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1Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
WOODBURNING FIREPLACE
Fire Risk.
WARNING
For use with solid wood fuel only.Other fuels may overfire and generate poisonous gases (i.e. carbon monoxide).
Model(s):
Installation ManualInstallation and Fireplace Setup
WARNINGHOT SURFACES! Glass and other surfaces are hot during operation AND cool down.Hot glass will cause burns.• DO NOT touch glass until it is cooled• NEVER allow children to touch glass• Keep children away
• CAREFULLY SUPERVISE children in same room as fireplace.
• Alert children and adults to hazards of high temperatures.High temperatures may ignite clothing or other flammable materials.• Keep clothing, furniture, draperies and other flammable
materials away.
INSTALLER: Leave this manual with party responsible for use and operation.OWNER: Retain this manual for future reference.
BIR50-B
NOTICE: DO NOT discard this manual!
• DO NOTstoreorusegasolineorotherflam-mablevaporsandliquidsinthevicinityofthisor any other appliance.
• DO NOToverfire.Overfiringwillvoidyourwarranty.
• Comply with all minimum clearances to com-bustiblesasspecified.Failuretocomplymaycausehousefire.
WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death.
Installationandserviceofthisapplianceshouldbeperformedbyqualifiedpersonnel.Hearth&HomeTechnologiesrecomendsHHTFactoryTrainedorNFIcertifiedprofessionals.
2 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
Safety Alert Key:• DANGER! Indicatesahazardoussituationwhich,ifnotavoidedwill result in death or serious injury.• WARNING!Indicatesahazardoussituationwhich,ifnotavoidedcould result in death or serious injury.• CAUTION! Indicatesahazardoussituationwhich,ifnotavoided,couldresultinminorormoderateinjury.• NOTICE:Indicatespracticeswhichmaycausedamagetothefireplaceortoproperty.
Table of Contents
1 Product Specific & Important Safety Information A.ApplianceCertification 4B.Non-CombustibleMaterials 4C.CombustibleMaterials 4
2 Getting Started A.TypicalFireplaceSystem 5B. Design and Installation Considerations 6
1. Selecting Fireplace Locations 62.LocatingFireplace&Chimney 7
C.ToolsandSuppliesNeeded 8D.InspectFireplaceandComponents 8E.FireplaceSystemRequirements 8
3 Framing and Clearances A. Fireplace Dimensions 9B. Clearances 10
MinimumClearancestoCombustibles 10C. Construct the Chase 11D. Frame the Fireplace 12E.SecureandLeveltheFireplace 13F. ProtectiveMetalHearthStrips 13G.OutsideAirKit 13
4 Chimney and Termination Installation A.ChimneyRequirements 15B.Clearances 17C.InstallationNotes 17D.FrameOpenings 17E.CutRoofOpening 17F. InstallFirestop 17G.AssembleChimneySections 18H.UsingOffsets/Returns 18I. OffsetElbowInstallation 19J. SupplementarySupport&Stabilizer 19K. Install Attic Insulation Shield 20L. Install Roof Radiation Shields 20M.AttachFlashing 20
Field-ConstructedChaseTopFlashing 21N.FinishTop 22O.ChimneyTerminationRequirements 23
5 Shrouds A.ShroudRequirements 24B.HouseStyleShroud 25C.Arch/MailboxStyleShroud 26D. Pyramid Style Shroud 26
6 Finishing A.FinishingMaterial 27B.HearthExtension,BuildingandFinishing 29
1. Fireplace Installed Flush on the Floor andHearthExtensionRaisedto BottomofFireboxOpening 292.RaisedHearthExtensionandRaisedFireplace 303.FireplaceOpeningandHearthExtensionFlush withtheFloor 31
C.Non-CombustibleSealantMaterial 31D.Sidewalls/Surrounds 31E.MantelandWallProjections 32
7 Fireplace Setup A. InstallHearthMoldedBrickPanel 33B. InstallBackMoldedBrickPanel 33C.InstallSideMoldedBrickPanel 33D.InstallScreens 34E. InstallMortar(Optional) 34F.Grate 34G.GasLog/LighterProvision 35H.WoodBurningInserts 35
8 Reference Materials A.ChimneyComponents 36B.OptionalComponents 36
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3Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
Customer:Lot/Address
Model (circle one): BIR50-B
YES IF NO, WHY?
WARNING! Risk of Fire or Explosion! Failure to install fireplace acording to these instructions can lead to a fire or explosion.
Verifiedthatthechaseisinsulatedandventilated(Pg.11)Verifiedclearancestocombustibles.(Pg.10)Fireplaceisleveledandsecured.(Pg.13)
Hearthextensionsize/heightdecided.(Pg.29)Outsideairkitinstalled.(Pg.14)
Chimney configuration complies with diagrams.
Firestops installed.
Roof flashing installed.
Chimneyinstalled,lockedandsecuredinplacewithproperclearance.
Terminationsinstalled.
Installer:
Shrouds Section 5 (Pg. 24)Shrouds properly installed per instructions.
Dealer/Distributor Phone #Serial #:
Chimney Section 4 (Pg. 15)
Fireplace Install
Protectivehearthstripsinstalledpermanualrequirements.(Pg.13)
Attic insulation shield installed.
ATTENTION INSTALLER:Follow this Standard Work Checklist
Thisstandardworkchecklististobeusedbytheinstallerinconjuctionwith,notinsteadof,theinstructionscontainedinthis installation manual.
Date Installed:Location of Fireplace:
4059-704•RevC•4-17-13
Commentscommunicatedtopartyresponsible
Combustiblematerialsnotinstalledinnon-combustibleareas.Verifiedallclearancesmeetinstallationmanualrequirements.Mantelsandwallprojectionscomplywithinstallationmanualrequirements.
Allpackagingandprotectivematerialsremoved.Fireplace Setup Section 7 (Pg. 33)
__________________________by______________________on________
Moldedbrickpanelsinstalledcorrectly.Optionaldoorsproperlyinstalled.
•Photographingtheinstallationandcopyingthischecklistforyourfile.•Thatthischecklistremainvisibleatalltimesonthefireplaceuntiltheinstallationiscomplete.
Hearth & Home Technologies recommends the following:
Grate properly installedFirescreen installed properly.
(Builder/Gen.Contractor)(Installer)(Date)
Comments:Furtherdescriptionoftheissues,whoisresponsible(Installer/Builder/OtherTrades,etc.)andcorrectiveactionneeded:_________________________________________________________________________________________________
Manualbagandallofitscontentsareremovedfromthefireplaceandgiventothepartyresponsibleforuseandoperation.
________________________________________________________________________________________________________________________________________________________________________________________________________________
Hearthextensioninstalledpermanualrequirements.
Finishing Section 6 (Pg. 27)
4 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
WARNING! Risk of Fire! Hearth & Home Technologies disclaims any responsibility for, and the warranty and agency listing will be voided by the following actions.DO NOT:• installoroperatedamagedfireplace• modifyfireplace• install other than as instructed by Hearth & Home
Technologies• operate the fireplace without fully assembling all
components• overfire• install any component not approved by Hearth & Home
Technologies• install parts or components not Listed or approvedImproper installation, adjustment, alteration, service or maintenance can cause injury or property damage. For assistance or additional information, consult a qualifiedinstaller, service agency or your dealer.
B. Non-Combustible Materials• Materialswhichwillnot igniteandburn,composedof
anycombinationofthefollowing:- Steel - Iron- Brick - Tile- Concrete - Slate- Glass - Plasters
• MaterialsreportedaspassingASTM E 136, Standard Test Method for Behavior of Metals, in a Vertical Tube Furnace at 750° C
C. Combustible Materials• Materialsmadeoforsurfacedwithanyofthefollowing
materials:- Wood - Compressedpaper- Plantfibers - Plastic- Plywood/OSB - Sheetrock(drywall)
• Anymaterialthatcanigniteandburn;flameproofedornot, plastered or un-plastered
1 Product Specific & Important Safety Information
WARNING: This product and the fu-els used to operate this product (wood and wood pellets), and the products of combustion of such fuels, can expose you to chemicals including carbon black, which is known to the State of California to cause cancer and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov.
A. Appliance CertificationThisfireplacesystemhasbeentestedandlistedinac-cordancewithUL127standardsbyUnderwritersLabo-ratories Inc. for installation and operation in the United States.ThisfireplacemaybeinstalledinsleepingroomsEX-CEPTinmanufacturedhomes.Ifinstalledwithagaslogset,provisionsfortheNationalFuelGasCodemustbemet.Thisfireplacehasbeentestedandlistedforusewiththeoptionalcomponentsspecifiedinthismanual.Theseoptionalcomponentsmaybepurchasedseparatelyandinstalledatalaterdate.Theoutsideairkitsmustbeinstalledatthetimeoffireplaceinstallation.
5Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
2 Getting Started
Additional lateralsupport for chimneyabove roof (or enclosedin chase) if needed
Ceiling firestopon floor of attic
Support strapson rafter supportschimney (not shown)
Termination cap
Chimney penetrates roofpreferably without affectingroof rafters
Framing headed offin ceiling joists
Enclosed space aboveand around fireplace
Mantel and surround
Decorative facingand trim
Hearth extension
Factory-built fireplaceProtective metalhearth strip(s)
Combustibleframing/headeron top ofV-shaped standoffs(spacers)
Chimney system
Attic insulation shield must be usedhere to keep insulation away from chimney if attic is insulated
Attic Shield Collar
Storm Collar
Outside Air(both sides)
Chase Top Flashing
(4) Roof Radiation Shields
A. Typical Fireplace System
Figure 2.1 Typical Fireplace System
6 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
A*
F
D
BC
1/2 in. (13 mm) all configurations
1-1/2 in. min. air space from fireplace to combustible materials.1/2 in. min. air space at nailing flanges.
Note:
In an exterior chase or projecting into a garage
Across a corner
As a room divider Along a wall
92 in.(2337 mm)
G
B
E
48 in.(1219 mm)MINIMUM
24 in. (610 mm)from fireplace opening to
any perpendicular wall
A
B
G
G
B
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Model # A B C D E F Gin. 85 7/8 61 7/8 103 1/4 51 5/8 25 1/4 73 28 1/2
mm 2181 1572 2623 1311 641 1854 724BIR-50
* 12 in. (305 mm) extra space included for each outside air connection. If outside air duct has no bend, this dimension may be reduced as long as minimum clearances are met.
Figure 2.2 Fireplace Locations
NOTICE:• Illustrationsandphotosreflecttypicalinstallationsand
are FOR DESIGN PURPOSES ONLY.• Illustrations/diagrams are not drawn to scale.• Actual installation/appearance may vary due to individual
design preference.• Hearth & Home Technologies reserves the right to alter
its products.
NOTICE: In addition to these framing dimensions, also reference the following section:
• Framing and Clearances (Section 3).
NOTICE: A minimum 1-1/2 in. air clearance at the back and sidesofthefireplaceassemblymustbemain-tained.Chimney sections at any level require a 2 in. minimum air space clearance between the framing and chimney sections.
B. Design and Installation Considerations
NOTICE: Check building codes prior to installation.
• InstallationMUSTcomplywithlocal,regional,stateandnational codes and regulations.
• Consult insurancecarrier, localbuildinginspector,fireofficialsorauthoritieshavingjurisdictionoverrestrictions,installation inspection and permits.
• Before installing, determine the following:- Wherethefireplaceistobeinstalled.- Theventsystemconfigurationtobeused.- Gas supply piping.- Electrical wiring.- Framingandfinishingdetails.- Whetheroptionalaccessories-devicessuchasa
fan, wall switch or remote control - are desired
1. Selecting Fireplace LocationsThisfireplacemaybeusedasaroomdivider,installedalongawall,acrossacornerorusedinanexteriorchase.See Figure 2.2.Locatingthefireplaceinabasementshouldbeavoided.Locatingnearfrequentlyopeneddoors,centralheatoutletsorreturns,orotherlocationsofconsiderableairmovementcanaffecttheperformance.
Considerationshouldbegiventothesefactorsbeforedeciding on a location.
7Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
2. Locating Fireplace & Chimney
Locationofthefireplaceandchimneywillaffectperfor-mance. • Installwithinthewarmairspaceenclosedbythebuilding
envelope.Thishelpstoproducemoredraft,especiallyduringlightinganddie-downofthefire.
• Installingthefireplaceinabasementisnotrecommended.• Penetratethehighestpartof theroof.Thisminimizes
theeffectsofwindloading.• Locate termination cap away from trees, adjacent
structures,unevenrooflinesandotherobstructions.• Minimizetheuseofchimneyoffsets.• Considerthefireplacelocationrelativetofloorandceiling
and attic joists.• Takeintoconsiderationtheterminationrequirementsin
Section4.
Marginal Location:• Below peak
Location NOT recommended:• Not the highest point of the roof• Wind loading possible
Multi-level Roofs
Windward
Leeward
Recommended Location:• Above peak
Recommended:• Insulated exterior chase
in cooler climates
Recommended Location:• Above peak• Inside heated space
Location NOT recommended:• Too close to tree• Below adjacent structure• Lower roof line• Avoid outside wall
Marginal Location:• Wind loading possible
Not recommended in basement due to high negative pressure concerns that effect draftFigure 2.3 Recommended Chimney Locations
• Installtheoutsideairkitwiththeintakefacingprevailingwinds during the heating season.
• Ensure adequate outdoor air for all combustionappliancesandexhaustequipment.
• Ensurefurnaceandairconditioningreturnventsarenotlocatedintheimmediatevicinityofthefireplace.
• Avoid installingthefireplaceneardoors,walkwaysorsmall isolated spaces.
• Recessedlightingshouldbea“sealedcan”design.• Attic hatches weather stripped or sealed.• Atticmountedductworkandairhandlerjointsandseams
taped or sealed.
8 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
C. Tools and Supplies NeededBeforebeginningtheinstallationbesurethefollowingtoolsandbuildingsuppliesareavailable:Reciprocating saw Framing materialPliers Non-combustiblesealantHammer GlovesPhillipsscrewdriver FramingsquareFlatbladescrewdriver ElectricdrillandbitsPlumbline SafetyglassesLevel Tapemeasure1/2-3/4in.length,#6or#8self-drillingscrewsMisc.screwsandnails
D. Inspect Fireplace and Components
WARNING! Risk of Fire and/or Explosion! Damaged parts could impair safe operation. DO NOT install dam-aged,incompleteorsubstitutecomponents.Keepfire-place dry.
• Removefireplaceandcomponentsfrompackagingandinspect for damage.
• Vent system components and doors are shipped in separatepackages.
• Report to your dealer any parts damaged in shipment.• Read all the instructions before starting the
installation. Follow these instructions carefully during the installation to ensure maximum safety and benefit.
E. Fireplace System RequirementsTheHeatilatorfireplacesystemrequirementsconsistofthe following:• Fireplace
- Molded brick panels (hearth panel Includedwithfireplace,sideandbackpanelssoldseparately)
- Firescreen(includedwithfireplace)- HearthExtension(soldseparately)- Grate(includedwithfireplace)
• OutsideAirSystem- AirInletHoodx2(includedwithfireplace)- Flex(required,soldseparately)
• Chimney System- AtticInsulationShield(soldseparately)- Chimneyterminationcap(soldseparately)
• Non-combustiblefinishmaterial
9Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
3 Framing and Clearances
A. Fireplace Dimensions
16 1/8 in.408 mm
Gas LineKnockout
11 1/8 in.282 mm
6 7/8 in.175 mm
5 in.129 mm
50 in.1270 mm
60 7/8 in.1546 mm
3 3/4 in.97 mm
38 in.965 mm
54 in.1372 mm
74 1/8 in.1883 mm
70 3/4 in.1797 mm
16 1/8 in.408 mm
11 1/8 in.282 mm
6 7/8 in.175 mm
5 in.129 mm
45 1/8 in.1146 mm
11 in.281 mm
27 1/2 in.699 mm
74° TYP.
Gas LineKnockout
22 1/2 in.572 mm
61 7/8 in.1572 mm
5 1/2 in.140 mm
Outside AirOutside
Air
Figure 3.1 Fireplace Dimensions
10 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
1/2 in. air spaceestablished by
spacersChase TopFlashing
RoofRadiation Shield
1/2 in.Air Space
Spacers furnished withcomplete Chase Top Flashing
(May be field-fabricated)
1/2
Storm collar mustbe installed 1 in.
off chase top
CHASE TOP CLEARANCES
1 1/2” Ventilation Openingaround Chimney Pipe
(insulation)
0 in. to levelof standoffs
Attic Insulation Shield
(ceiling)
(roof)
(attic)
(ceiling)
Attic Shield Collar
Ceiling Firestop
Storm Collar
Chase Top Flashing
1-1/2 in. (38 mm) to back & sides
of appliance(except at nailing flanges where it is
1/2 in. [13 mm])
Must have 2 in. (51 mm)minimum clearance
to any combustible materialsincluding header
0 in.to floor
2 in. (51 mm) min.
Shaded areasrepresent
2 in. (51 mm) min.air space clearance
required around pipe
Com
bust
ible
Obj
ect
48 in.1219 mm
1 in.
B. ClearancesWARNING! Risk of Fire!
You must comply with all minimum air space clearances tocombustiblesasspecifiedinFigure3.2.DO NOT pack required air spaces with insulation or other materials. Framing or finishingmaterial used on the front of, or infrontof,thefireplacecloserthantheminimumslistedmustbe constructed entirely of non-combustible materials (i.e., steel studs, concrete board, etc.). Failure to comply may causefire.
Figure 3.2 Clearances to Combustible Materials
Minimum Clearances to Combustibles
WITHIN ENCLOSURE AREAFireplacetobackwall 1-1/2in.(38mm)Fireplace to sidewall 1-1/2in.(38mm)Topstandoffstoheader 0in.(0mm)Door opening to sidewall 24in.(610mm)MANTELMantelminimumheight 63-3/4in.(1619mm)Maximummanteldepth 12in.(305mm)
11Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
C. Construct the ChaseAchaseisaverticalboxlikestructurebuilttoenclosethefireplaceand/oritsventsystem.Verticalchimneysthatrunontheoutsideofabuildingmustbeinstalledinsideachase.Incoldclimates,Hearth&HomeTechnologiesrecom-mendsthatthechasebewellinsulatedusingbatttypeinsulationbetweenthejoists.Constructionofthechasemayvarywiththetypeofbuild-ing.Theseinstructionsarenotsubstitutesfortherequire-mentsoflocalbuildingcodes.LocalbuildingcodesMUSTbechecked.Chasesshouldbeconstructedinthemannerofalloutsidewallsofthehometopreventcoldairdraftingproblems.Thechaseshouldnotbreaktheoutsidebuildingenvelopeinanymanner.Allouterwallsneedtobeinsulated.Buildingcodesrequirefalseceilingandceilingfirestops/atticshieldsateachfloorofthechaseorevery10ft(3048mm)ofclearspacetocontrolspreadoffire.Walls,ceiling,baseplateandcantileverflooratthefirstlevelofthechaseshouldbeinsulated(seeFigure3.3.)Vaporandairinfiltrationbarriersshouldbeinstalledinthechase as per regional codes for the rest of the home. Ad-ditionally,Hearth&HomeTechnologiesrecommendsthattheinsidesurfacesbedrywalledandtaped(ortheuseofanequivalentmethod)formaximumairtightness.Holesandotheropeningsshouldbecaulkedwithhightemperaturecaulkorstuffedwithunfacedfiberglassinsulation.
Ceiling Firestop
Metal Chase Top
Round Termination Cap
False Ceiling
Insulation in the outside walls of the chase
Attic Insulation
Shield
Chimney
Ceiling Firestop
Tabs
False Ceiling False Ceiling Insulation Insulation
Storm Collar
Figure 3.3 Chase Assembly
1 2 3
All outside walls should be insulated.
Figure 3.4 Chase Constructions
1. Fireplaceandchimneyenclosedinanexteriorchase. 2. Chimneyoffsetthroughexteriorwallandenclosedinchase. 3. Chaseconstructedonroof.• Thechaseisconstructedusingframingmaterialsmuch
thesameasthewallsinyourhome.Avarietyofsidingmaterialsmaybeused includingbrick, stone, veneerbrick,orstandardsidingmaterials.
• In constructing the chase, several factorsmust beconsidered:- Maintain a 2 in. (51mm) air space around the
chimney.- The chase top must be constructed of non-
combustiblematerial.- Incoldclimates,afirestopspacerandatticinsulation
shieldshouldbeinstalledinaninsulatedfalseceilingat the 8 ft. (2438mm) level above the fireplaceassembly.Thisreducesheatlossthroughthechase.
- Incoldclimates, thewallsof thechaseshouldbeinsulatedtothelevelofthefalseceilingasshowninFigure3.3.Thiswillhelpreduceheatlossfromthehomearoundthefireplace.
ThreeexamplesofchaseapplicationsareshowninFig-ure3.4.
WARNING! You must install false ceilings and ceil-ing firestops at each floor of the chase or every 10 ft (3.05 m) to control spread of fire.
WARNING! Risk of Fire! DO NOT sealareabetweenfirestop opening and chimney pipe except where they enter the attic or leave the warm air envelope of the home (use 600° F sealant).
WARNING! Risk of Fire! You must maintain a minimum 2 in. (51 mm) air space clearance to insulation and oth-er materials surrounding the chimney system.• Insulationandothermaterialsmustbefirmlysecuredto
prevent accidental contact with chimney system.• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and makingcontactwithfireplaceorchimney.
• Failure to prevent contact between insulation or other materials and chimney system may cause overheating andfire.
12 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
WARNING! Risk of Fire! You must comply with all minimum air space clearances to combustibles. DO NOT pack required air spaces with insulation or other materi-als.
WARNING! Risk of Fire! Comply with all minimum clear-ancesspecified.• A minimum 1-1/2 in. (38 mm) air clearance must be
maintained at the back and sides of the fireplace assembly.
• Chimney sections at any level require a 2 in. (51 mm) minimum air space clearance between the framing and chimney section.
CAUTION! Risk of Cuts/Abrasions. Wear protective gloves and safety glasses during installation. Sheet metal edges are sharp.
B
C
A
2 in. (51 mm)min. air spaceclearancefrom chimney.
Note: Framing must beextended straight up,all the way to the ceiling.
Header MUST NOT be notched!
D
D = extra space needed for outside air connection. If outside air duct has no bend, this dimension may be reduced as long as minimum clearances are met.
D
E
A B * C ** D E min.in. 61 7/8 28 3/8 74 1/2 12 21
mm 1572 721 1892 305 533
Model #
** Adjust header height for raised floor under fireplace.
BIR-50
* If interior of chase will be drywalled, add the thickness to this meaurement.
The header cannot be positioned until after the fireplace assembly is in place.
Figure 3.5 Framing the Fireplace
D. Frame the Fireplace
NOTICE: Hearth extensiondesignmust be determinedbeforeinstallationoffireplace.
Ifthefireplaceisplacedonthefloor,themaximumheightofafinishedraisedhearthis3-3/4”,ifyouwantahigherraisedhearththefireplacemustbeplacedonaplatform.Figure3.5showsatypicalframing(using2x4lumber)ofthefireplace,assumingcombustiblematerialsareused.Allrequiredclearancestocombustiblesaroundthefire-placemustbeadheredto.SeeFigure3.2.Anyframingacrossthetopofthefireplacemustbeabovethelevelofthetopstandoffs.(Norecessabovestandoffs.)Thefinishedcavitydepthmustbenolessthan28-1/2in.(673mm)fromthefinishedbackwalltotheoutsideoffrontwallframing.Framingmustextendstraightupallthewayto the ceiling.
Note: Before framing up the chase, consider where andhowthechimneywillrun.Ifthereareobstaclesthatmightbeintheway,itmaybenecessarytomakethechaselargerthanshowntoallowoffsetstobeused.Refertooffsetchartonpage18.
13Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
E. Secure and Level the FireplaceThis fireplacemaybeplacedoneither a combustible ornoncombustiblecontinuousflatsurface.Slidethefireplaceintoposition.Besuretoprovidetheminimum1-1/2in.airclearanceatthesidesandbackofthefireplace.Thefireplaceshouldbepositionedsothefaceofthenon-combustiblematerialonthefireplacewillbeflushwiththeface of the drywall on the walls. Levelthefireplaceandshimasnecessary.
1 in. (25 mm) overlap
Protective metal strips are placed 2 in. (51 mm) under the front of the fireplace and must extend beyond the front and sides of fireplace opening by 2 in. (51 mm).
Raised Platform
Floor
2 in.(51 mm)
1 in. (25 mm) min.overlap
2 in.(51 mm)
Top piece must overlapbottom piece
Figure 3.7 Protect the Front of an Elevated Platform
F. Protective Metal Hearth Strips
Figure 3.6 Position the Protective Metal Hearth Strips
• Locatethetwoprotectivemetalhearthstripsmeasuringapproximately26in.x4in.(660mmx102mm)includedwiththisfireplace.
• Slideeachmetalstrip2in.(51mm)underfrontedgeoffireplace.
• Overlapstripsinthemiddleoffireplaceopeningby1in. (25mm)minimum.
• Metal stripsmust extendbeyond the front and sidesof the fireplace opening by at least 2 in. (51mm),Figure3.6).
• Protectthefrontofaplatformelevatedabovethehearthextensionwithmetalstrips(notincludedwithfireplace)per Figure 3.7. See Section 6 for hearth extensioninstructions.
WARNING! Risk of Fire! Protective metal hearth strips MUST be installed on combustible surfaces. DO NOT cover metal strips with combustible materials. Sparksorembersmayigniteflooring.
WARNING! Risk of fire! High temperatures, sparks, embers or other burning material falling from the fireplacemayigniteflooringorconcealedcombustiblesurfaces.• Protective metal hearth strips MUST be installed.• Hearth extensions MUST be installed exactly as
specified.
WARNING! Risk of Fire! Prevent contact with sagging, loose insulation. • DO NOT install against vapor barriers or exposed
insulation.• Secure insulation and vapor barriers.• Provide minimum air space clearances at the sides and
backofthefireplaceassembly.
G. Outside Air Kit (Required on both sides)Outsideairkitsmustbeusedforcombustionandtopro-vide cooling air to prevent overheating. Hearth & HomeTechnologiesrecommendsyouutilizetheshortestductruntooptimize theperformanceof theoutsideairkitand in-stallaP-Trap(seeFigure3.10).Theoutsideairinlethoodsshouldbepositionedinamannerthatwillnotallowsnow,leaves,etc.toblocktheinlet.Insomeinstallationstheairductmayneedtoberunvertically.Insuchaninstallation,a3ft(914mm)heightdifferencemustbemaintainedfromthe top of the uppermost chimney section to the outside combustionairinlethood.
Note: Maximumlengthis40feet.►
14 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
3 ft min. fromtop of uppermost chimney section to air inlet.
CAUTION! Risk of Cuts/Abrasions. Wear protective gloves and safety glasses during installation. Sheet metal edges are sharp.
CAUTION! Risk of Fire or Asphyxiation! DO NOT draw outsidecombustionairfromwall,floororceilingcavity,orenclosed spaces such as an attic or garage. • DO NOT place outside air inlet hood close to exhaust
vents or chimneys. Fumes or odor could be drawn into theroomthroughthefireplace.
• Locate outside air inlet hood to prevent blockage from leaves, snow/ice, or other debris. Blockages could cause combustion air starvation.
Figure 3.8 Outside Air Inlet Locations
Outlet placedhigher than 3 ft
below thetermination cap
Attic space
Garage orcombustible
liquids storageOutlet blocked bysnow, leaves, etc.
Clear area outside
house or in ventilated
crawl space
YES
NONO
NO
NO
Factory-builtfireplace
• Use UL181 Class 1 or Class 0 rigid or flexible ducting. • Install with short run and add a P-trap which will help
prevent flow of cold air.• Secure flex duct with screws or wire ties.
Figure 3.8 Outside Air Installation
Outside air is re-quired to be in-stalled on both sides (right side not shown)
NOTICE: The fireplace provides some outside air for combustion. Other methods may be necessary if more air is required.
RefertoFigures3.8and3.9whenplacingtheoutsideairinlet hood.
WARNING! Risk of Fire! The outside air kits are in-stalledonthebothsidesofthefireplacetopreventover-heatingandfire.• Cuta6in.(152mm)holeinoutsidewalltoaccommodate
air piping. • Use6in.(152mm)flex(notsupplied)todirectlyconnect
outsideairtofireplaceintake.Insulatethepipetopreventfrost condensation.
• Use the supplied outside air inlet hoods.• Seal between thewall and the pipewith silicone to
preventmoisturepenetrationandairleaks.• Sealbetweentheoutsideairinlethoodsandthehouse
withsiliconetopreventairinfiltration.
Typical Outside Air Installation
Typical CAK Installation
Seal
Seal
24” (610 mm) min.48” (1220 mm) max.
Note: The pipe cannot lay on top of the unit.
4” Duct-Use UL181 Class 0 or Class 1 ducting Recommend
around 24 inchesfor a minimum bend
Figure 3.10 P-Trap
15Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
4 Chimney and Termination Installation
NOTICE: Chimney performance may vary.
• Trees,buildings,roof linesandwindconditionsaffectperformance.
• Chimney height may need adjustment if smoking or overdraft occurs.
A. Chimney RequirementsMeasureverticaldistancesfromthebaseofthefireplace.
WARNING! Risk of Fire! You must maintain 2 in. (51 mm) air space clearance to insulation and other com-bustible materials around the chimney system. Failure to do so may cause overheating and fire.
Feet Meters• Minimumoverallstraightheight 18 5.49
• Minimumheightwithoffset/return 18.5 5.64
• Maximumheight 50 15.24
• Maximumchimneylengthbetweenanoffsetand return
20 6.10
• Maximumdistancebetweenchimneystabilizers
25 7.62
• Maximumunsupportedchimneylengthbetweentheoffsetandreturn
6 1.83
• Maximumunsupportedchimneyheightabovethefireplace
25 7.62
• Maximumunsupportedchimneyaboveroof 6 1.83
• Minimumheightwithdoubleoffset/return 22.5 6.86
Height of Chimney Components in. mm
Stabilizer
14DCA-ST
Firestop
14DCA-FS
Elbows
14DCA-E15-15°Elbow
14DCA-E30-30°Elbow
Miscellaneous
14DCA-ES-ElbowStrap
14DCA-SS-SupplementarySupport
14DCA-IS-InsulationShield
14DCA-RRS-RoofRadiationShield
14DCA-CTF-ChaseTopFlashing
14DCA-CTC-ChaseTopCollar
14DCA-VC1-ChimneyCap
14DCA-SC-StormCollar
14DCA-WS-WallStrap
Chimney Sections*
14DCA-12 101/2 267
14DCA-18 161/2 419
14DCA-36 341/2 876
14DCA-48 461/2 1181
*Dimensionsreflecteffectiveheight.
Table 4.1
16 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
(4) Roof Radiation Shields
Chimney Section
Chimney Section
Attic InsulationShield & Collar
Square Frame
Firestop
Square Frame
Firestop
Chimney Section
74 1/8 in.(1883 mm)EffectiveHeight
Termination Cap
Storm Collar
Chase Top Flashing
The chimney must be enclosed from the fireplace to the attic maintaining the 2 inch clearances.
Figure 4.1
Determine the chimney components needed to complete your particular installation:• Measure the total vertical height of the fireplace
installationfromthebaseofthefireplaceassemblytotheapproximatelocationofthebottomoftheterminationcap.
• Subtracttheeffectiveheightofthefireplaceassembly(seeFigure4.1)fromthetotalverticalheighttodeterminetheoverallheightofthechimneyinstallation.
• Create a schematic for your application similar to Figure 4.1showingcomponentsrequired(referringtoTable4.1).
• Installaceilingfirestopwheneverthechimneypenetratesafloor/ceiling.
NOTICE: Amaximumoftwooffsetandreturnmaybeused.
CAUTION! Risk of Fire and/or Asphyxiation! DO NOT connectthisfireplacetoachimneyflueservicinganother appliance. Do NOT connect to any air distribu-tion duct or system. These actions could cause over-heating/fire in thechimneyflue,orreleaseofexhaustfumes into the living areas.
17Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
A MAJOR CAUSE OF VENT RELATED FIRES IS FAIL-URE TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES) TO COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST IMPORTANCE THAT DURACHIMNEY II BE INSTALLED ONLY IN ACCORDANCE WITH THESE INSTRUCTIONS.
B. ClearancesAlwaysallowatleasta2-inchclearancebetweenDura-ChimneyIIPipeandanycombustiblematerials.• Neverfillanyrequiredclearancespacewithinsulation
or any other materials. • Combustible materials include lumber, plywood,
sheetrock,plasterandlath,furniture,curtains,electricalwiring,andbuildinginsulation.
C. Installation NotesProper planning for your DuraChimney II installation will resultingreatersafety,efficiency,andconvenience,aswellassavingtimeandmoney.Youmust use only autho-rized DuraChimney II parts to maintain a listed chimney system. Do notmixpartsortrytomatchwithotherprod-uctsoruseimprovisedsolutions.• Do notinstalldamagedormodifiedparts.• Practice good workmanship. Sloppy work could
jeopardize your chimney’s safety. • Keep electrical wiring and building insulation away
from all chimneys. • When deciding the location of your chimney, try to
avoidmodificationstoroofbeamsandotherstructuralcomponentsofthebuilding.
Ifyouhaveanyquestions,contacteitheryourdealerorSimpson Dura-Vent directly.
D. Frame Openings• Fromtheceiling,dropaplumbbobtothecenterofthe
fireplace’sflueoutletandmarkthiscenterpointontheceiling.
• Markappropriatecuttinglinesaroundthecenterpoint.Cutasquareholeintheceiling.Framealevel,square,21in.x21in. (533mmx533mm)openingcenteredovertheholethatyouhavecut.
• Frameopeningsateachfloorlevelabovethefireplace(Figure4.1).Theseopeningsaretoholdthefirestopandattic insulation shield.
• Locateeachopeningbydroppingaplumbbobtothefourcornersoftheopeningbelow.
• Maintain theminimum 2-inch clearance/air space.Maintain theminimumclearancesanddimensionsasspecifiedinTable4.1.
E. Cut Roof OpeningDetermineandcutanopeningintheroofdirectlyabovetheopeningbelow,andatleast4-incheslargerthanthechimney’soutsidediametertoprovideatleasta2-inchclearance all around the chimney. • Thechimneymustbecenteredwithinthisopeningand
maintaintheminimum2-inchclearancetocombustibles.
F. Install FirestopAfirestopisrequiredoneachfloorpenetrationinmultisto-ryinstallation.BuildingCodesrequireafirestopateveryfloor/ceilinglevel,includingwherethechimneypenetratesintotheattic.Figure4.1showsatypical2-storyinstalla-tion with an attic. Note:afirestopisnot installed where the chimney pen-etrates through the roof. • Thefirestopisinstalledontheundersideoftheceiling/
floorframing(Figure4.2).• Useaminimumofone8pennynailorone1-1/4”wood
screw per corner.
Framing
Figure 4.2
18 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
G. Assemble Chimney Sections• Attach the first chimney sectionor offset onto
thetopofthefireplace(Figure4.3).Sheetmetalscrewsarerequiredtoconnectchimneysectionto the fireplace starter collar.Continue to addadditional sections of chimney as needed.
• Use awall strap every eight feet of chimneyheight.
• For each additional chimney section use four of thesheetmetalscrewsprovided tomakeasecureconnectionbetweenthechimneysections(Figure4.4).Donotpenetratetheinnerlinerofthe chimney.
Figure 4.3
Figure 4.4
H. Using Offsets/Returns• Useanoffset/returntobypassoverheadobstructions.• Anoffsetandreturncanbeusedasasingleentityorseparated
bychimneysection(s).WARNING! Risk of Fire! DO NOT useoffset/returnsgreaterthan30 ft. Chimney draft will be restricted and could cause overheating andfire.• Measure the shift required to avoid theoverheadobstruction
(Offset,Figure4.5).• FindtheappropriateoffsetdimensionlistedinTable4.2.• The rise (seeFigure4.5)coincidingwith theoffsetdimension
measurement in Table 4.2 represents the required verticalclearanceneededtocompletetheoffset/return.
Table 8.2
Elbow Angle from
Vertical
Chimney Length
Between Elbows
Offset Inches
Rise Inches
Offset Millimeters
Rise Millimeters
15° 0 25/8 215/8 67 549
15° 12in./305 mm 51/2 321/4 140 819
15° 18in./457 mm 71/8 38 181 965
15° 36in./914 mm 113/4 553/8 298 1407
15° 48in./1219 mm 147/8 67 378 1702
30° 0 61/4 241/2 159 622
30° 12in./305 mm 113/4 34 298 864
30° 18in./457 mm 143/4 391/4 375 997
30° 36in./914 mm 233/4 547/8 603 1394
30° 48in./1219 mm 293/4 651/4 756 1657
RISE
OFFSET
Figure 4.5
19Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
Elbow Strap
30° or 15°Elbow
Figure 4.6
Elbow Strap
1 perSection
Figure 4.7
I. Offset Elbow InstallationA30°Elbow(measuredfromthevertical)isthelargestthatcanbeusedinanoffset.A30°ElbowmaynotbecombinedwithanotherElbowtomakeasteeperoffset(e.g.two30°Elbowsarenotallowedtobeputtogethertoforma60°elbow.).AvoidElbowsifpossible.Atotallyver-ticalchimneyismoreefficient.WhenElbowsareneces-sarytoavoidobstructionssuchasrafters,ridgepoles,orjoists,youareonlyallowedtouse2pairofElbowsinanyonechimneysystem.Horizontalrunsofchimneyviolatebuildingcodeandarenotallowed.• Attachelbows Attach elbow to chimney section or other elbow by
mating the male and female ends with each other and using four sheetmetal screws provided.Attach oneelbowtothechimneysectionbelow,andalignitfortheoffset.Determinetherequiredoffsetlengthandattachanappropriatelength(orlengths)ofchimneysection(s)abovetheelbow.Attachthesecondelbowabovethechimneysectiontocompletetheoffset(Figure4.6).
• Secureoffset Useanelbowstrap to secure theoffset.Secure the
elbowstrap’sbandtochimneyaroundtheupperportionofthetopelbow,thentightenthenutandboltuntiltheclampisfirm.Wraptheelbowstrapendoveranadjacentjoistorrafterandsecureitwithatleasttwo8-pennynailsortwo#8,1-1/2”screws.Addadditionalelbowstrapsforeachsectionofchimneyintheoffset(Figure4.7).Everychimneysectionintheoffsetmustbesupported.Donotaddmorechimneysectionsuntiltheelbowsandoffsetaresupported.Besurethatthechimneyremainsvertical.
ChaseFrame
Stabilizer
PlumbersTape
Install supplementarysupport if height exceeds50 ft or if required by fireplace manufacturer
Each supplementarysupport holds up to25 ft. of chimney
Maintain 2 in. clearancefrom chimney to framing
Figure 4.8
Figure 4.9
J. Supplementary Support & StabilizerInstall a supplementary support if total chimney height isgreaterthan50-feet,orifthefireplacemanufacturerrequiresit.Ifadditionalsupportisneeded,installoneormoresupplementarysupportswhichcaneachsupport25-feetofchimney(Fig.4.8).• Clampthesupplementarysupportbandaroundthepipe
usingthenutandboltprovided,andanchorthesupporttonearbybuildingframing.
• Alwaysmaintainthe2”clearancetocombustiblesfromthe chimney pipe.A stabilizer is available andmaybe requiredby somefireplacemanufacturers to keepthe chimney vertical andhelpmaintain clearances tocombustibleswithinachase.
• Clampthestabilizertothepipeusingthenutandboltprovided, and secure legs to nearby framing usingplumber’stapeorguy-wires(Fig.4.9).
Note: The stabilizer does not support theweight of thechimney, it isonlyused tokeepchimneycenteredwithina chase.
20 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
K. Install Attic Insulation ShieldTheatticinsulationshieldmustbeinstalledwherethechimneypassesintoanattic.Itspurposeistopreventde-brisandinsulationfromgettingtooclosetothechimney.Inatticareaswherethisshieldcannotfit,orisnotusedyou must enclose the attic portion of the chimney in a framed enclosure. If the chimney is fully enclosed through theattic,anatticinsulationshieldisnotrequired.Installthe attic insulation shield as follows:• Removeanyinsulationfromatticflooraroundtheframed
opening.• Assemblechimneysectionsuntilatleast18inchesof
chimneyextendsabovethefirestop.• Sliptheatticinsulationshieldoverthechimneyuntilthe
basesitssquarelyontheframedopening(Figure4.10).• Secure the attic insulation shield to the top of the framed
opening using at least two 8-penny nails or two #8,1-1/2in.woodscrewsperside(Figure4.11).
• Wrapthecollaroftheatticinsulationshieldaroundthechimney and fasten it loosely. Slide the collar down tomeettheatticinsulationshield.Tightentheboltstosecurethecollarinplace(Figure4.11).
• Combustiblematerialmaycomeintocontactwiththeatticinsulationshieldaslongastherequiredclearancesaremaintained to the chimney pipe.
AtticInsulation
Shield
Firestop
Attic
Figure 4.10
AtticAttic ShieldCollar
FirestopFigure 4.11
L. Install Roof Radiation ShieldsRoofradiationshieldsmustbeusedtoprovideprotectionforrooforchaseframingmembers.Note: Roof radiation shields do not allow for a reduced clearancetocombustibles.Clearancetocombustiblesmustbeaminimumof2”away from the chimney pipe. • Install roof radiation shields at either the top of the chase
orwherethechimneypenetratestheroof,whicheveristhe top of the installation.
• Roofradiationshieldsarebuiltwitha1/2”airgapstandofffromthejoistface(Figure4.12).Thecornersoftheroofradiationshieldsoverlapeachother toensureproperposition.
• Secure the roof radiation shields to the top of the framing membersusingscrewsornailsinthecorners.
• Ifframingmembersarefurtherawayfromthechimneythan 2 in., center the roof radiation shield to the chimney ontheframingmemberandsecureinplacewithscrewsor nails.
(4) RoofRadiationShields
ChaseEnclosure
Figure 4.12
M. Attach FlashingForchaseenclosures,usethechasetopflashing.Thechasetopflashingallowsfora1-1/2in.clearancemain-tainedfromthechimney(Figure4.14)andprovidesrequiredventilationair.• Chase top flashings (includes chase top collars and
spacingclips)areavailablefromyourHHTdealer.• Additionalnon-combustiblestructuralsupportscanbe
field-fabricatedtohelpsupportthechasetopflashingifneeded,providedtheairventilationrequirementsaremaintained.SeeFigure4.15.
• Ifthechasetopflashing(40in.x40in.)doesnotensuretheminimum1/2in.spacingandperimeterventilationrequirementsasshowninFigure4.13.,useachasetopcollarandfield-constructtheflashingasneededforthechasedimensions.SkiptoField-Constructed Chase Top Flashing.
21Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
1/2"
Chase top flashing
Roof radiation shields
Required spacing clips
Spacing Clips
1/2 in. air spaceestablished byspacing clips
1/2 in. Air Space
Storm collar mustbe installed 1 in.
off chase top
1 1/2 in. ventilation opening around chimney pipe
Figure 4.13
Figure 4.14
Chase TopCollar
Sealant
AdditionalStructural Support
Screw orPop-rivet
InsectScreen
Roof Radiation Shieldsplaced here
Screwsto hold
flashing tochase top
Figure 4.15
1 1/2 in. ventilation opening around chimney pipe Chase Top Collar
Turn-down
Slope downward
Drip edge
Insect-guard screening may be added between chase and chase top flashing.
Figure 4.16
Field-Constructed Chase Top Flashing• Field-constructedflashingmustbeconstructedof24GA
minimumsheetmetalorothersuitablenon-combustiblematerials.
• Theflashingmustbeoversizedtoallow1/2in.airgaparound all four sides.
• Includeaminimum1 in. turndownanda1/2 in.dripedge(optional)topreventwaterfromseepingintothechase.RefertoFigure4.16.
• Additionalnon-combustiblestructuralsupportscanbefield-fabricatedtohelpsupportthechasetopflashingifneeded,provided theair ventilation requirementsaremaintained.SeeFigure4.15.
• Spacingclipscanbefield-fabricatedasneededoutof24GAsheetmetalorothersuitablenon-combustiblematerial(refertoFigure4.13),orpurchasedfromHearth&HomeTechnologies.
• Securethechasetopcollarsectiontothefield-fabricatedflashingwithsheetmetalscrewsorrivets(Figure4.15).
• Seal chase top collar section to flashing with non-hardening waterproof sealant to ensure a weather tight connection.SeeFigure4.15.
• Insect-guard screeningmay be added between thechaseandflashing.
• Installthechasetopflashingatthetopofthechasewitha1/2in.minimumairclearanceoffthetopofthechaseconstruction(Figure4.13).
• Spacingclipscanbefield-fabricatedasneededoutof24GAsheetmetalorothersuitablenon-combustiblematerial(refertoFigure4.13)
• Insect-guard screeningmay be added between thechaseandchasetopflashing.
• Securethechasetopflashingtothechasewithatleastthree screws or nails per side.
• Wheninstalled,thebottomofthechimneycapmustbeatleast6in.abovethechasetopflashing.
• Securethechasetopflashingtothechasewithatleastthree screws or nails per side.
• Wheninstalled,thebottomofthechimneycapmustbeatleast6in.abovetheflashing(Figure4.16).
Note: 30spacingclipsand20 ft insert-guard screening are included with the unit.
22 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
Sealant
6 in. min.
1 in.min.
StormCollar
3 ft. minimumabove roof
opening
N. Finish Top• Slidethestormcollardownoverthechimneytothetop
oftheflashing.Thestormcollarmustbeinstalled1in.offthechasetopflashingtoprovideproperventilation(Figure4.17).
• Tightentheboltsofthestormcollarandsealthestormcollar against the chimney with sealant. Be sure chimney andoffsetsareproperlysupported.
• Apply a non-hardening waterproof sealant around the chimney at the point where the storm collar will meet thechimneyjustabovetheflashing(Figure4.17).
• Attachthechimneycapontothetopofthechimneybysetting the female end of the cap onto the male end of thelastchimneysection.Securethecapbyusingfoursheetmetalscrews(provided,Figure4.18.)
• Do not push down from the top portion of the cap as this may damage the cap. Push from the lower section of the cap if needed.
• The chimney cap top can be removed for chimneycleaning.
TerminationCap
Figure 4.17
Figure 4.18
23Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
O. Chimney Termination Requirements• Installacapapprovedandlistedforthisfireplacesystem.• Locatecapwhereitwillnotbecomepluggedbysnoworothermaterials.• Locate cap away from trees or other structures.• Thebottomoftheterminationcapmustbeatleast3ft(.91m)abovetheroofANDatleast2ft(.61m)aboveanyportion
ofroofwithin10ft(3.05m)asshowninFigure4.19.• SeeFigure4.19fordistancerequiredbetweencaps.
Slanted Roofs
Flat Roofs
Chimney mustextend 3 ft (.9 m)above the roof
Chimney must extend 2 ft (.6 m)above any portion of the roof oradjacent structures within 10 ft (3 m) of the chimney
Chimney mustextend 3 ft (.9 m)above the roof
Chimney must extend 2 ft (.6 m)above any portion of the roof oradjacent structures within10 ft (3 m) of the chimney
Multiple Chimney Locations
A B6 in. (minimum) up to 20 in.
152 mm/508 mm18 in. minimum
457 mm20 in. and over 0 in. minimum
Gas, Wood or Fuel OilTermination Cap
WoodMinimum
(Seeillustration
above)
B
GasTermination
Cap **
A *
Per
pend
icul
ar W
all
* If using decorative cap cover(s), this distance may need to be increased. Refer to the installation instructions supplied with the decorative cap cover.
** In a staggered installation with both gas and wood terminations, the wood termination cap must be higher than the gas termination cap.
Figure 4.19 Multiple Chimney Locations
24 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
Roof radiation shields
Allow a 1 in. (25 mm) air gap between storm collar and chase top flashing
1/2 in. (13 mm) air space established by spacers
1/2 in.overhang
14 in. (345 mm) diameter chimney must extend at least 6 in. (152 mm) above chase top flashing.
DuraChimney IIPipe
1/2 in.(13 mm)
Spacers for chasetop flashing
Chase TopFlashing
Storm Collar
20 in. diameteropening
Chimney Cap
Maintain 2 in. (51 mm)clearance betweenDuraChimney II and
chase enclosure
• Chase top shroudsmay be field constructedwherepermittedbyregionalbuildingcodes.
WARNING! Risk of Fire! Shrouds must be constructed as specified.Improperconstructionmayoverheatchasetop.
NOTICE: Some regional codes require an agency-Listed shroud.Consultyourlocalbuildingofficials.
5 Shrouds
• Hearth&HomeTechnologiessuppliesULlistedshrouds.See your dealer for details.
A. Shroud Requirements
Figure 5.1 Shroud Requirements
Shroudscaneitherbefield-fabricatedorfactory-fabri-cated,buttheymustmeettherequirementsasspecifiedintheseinstructions.Shroudsmustbeconstructedofaminimum24ga(.024in.)stainlesssteel,aluminizedsteel,galvanizedsteel,orcopper.Othermaterialsmayalsobeused,suchasbrick,mortar,stucco,stone,etc.providedtheyarecompletelynon-combustible.Checkwithyourlocalbuildingcodeauthoritiesforanyadditionalshroudrequirements.Shroudsmustbeabletoberemovedtoal-low chimney access to properly clean the chimney. Dura-Chimney II installations which include the use of a shroud mustcomplywiththefollowingrequirements(Figure5.1)
• DuraChimney IImustmaintainat least2 in. (51mm)clearancefromcombustiblematerials.
• Thechaseenclosuremustbeventilated.• Thechasetopflashingorfield-fabricatedchasepanmust
beused.Field-fabricatedchasepansareacceptableiftheymeettheserequirements:- Materialmustbe24ga(.024in)galvanizedsteelor
equivalent.- Chasepanmusthaveopening3in.(76mm)larger
than outside diameter of chimney pipe with at least a1/2in.(13mm)upturnedflange/collar.
- Chasepanmustoverhangchaseby1/2in.(13mm)persideforproperairflow.
- Chasepanmusthavea1in.(25mm)downturnedoutsideedge(weatherprotection).
25Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
• Field-fabricated spacing clips (1/2 in./13mm tall, 24ga/.024in.galvanizedsteel)mustbeusedtosupportthechasetopflashingorchasepan,inordertoprovideairflow.
• 14in.(345mm)DuraChimneyIIpipemustextendatleast6in.(152mm)abovethechasepan/flashing.
• ADuraChimneyIIcapmustbeusedinsidetheshroud.• Theshroudmustnotbeindirectcontactwithanyofthe
DuraChimneyIIcomponents(otherthanthechasetopflashing).
• Allopenareasoftheshroudmustbecoveredwith1/2in.(13mm)stainlessorgalvanizedsteelmeshscreentopreventdebrisfromenteringtheshroud.
• Shroudsmust follow the dimensional requirementsspecified inTables5.1,5.2or5.3,dependingon thestyleofshroudused.Thethreebasicshroudstylesare1)House, 2)ArchorMailbox, and3)Pyramid.Mostfactory-fabricatedshroudswill fallunderoneof thesebasicstylecategories.
B. House Style ShroudThehouse-styleshroudisroughlysquareorrectangularwithaclosedtopandexhaustopeningsonfoursides(Figure5.2).Table5.1liststheminimumshrouddimen-sions, the minimum open area per side, and the minimum total open area for the shroud.
H
W L
Shaded area represents screened open area. Actual shape of shroud may vary as long as minimum dimen-sions and minimum open area requirements are met.
H: Minimum height of shroudL: Minimum length of shroudW: Minimum width of shroud
Figure 5.2 House-Style Shroud Minimum Dimensions
House Style Shroud Minimum DimensionsChimney Diameter Chimney Area Min Height H Min Length L Min Width W
Min Open Area per side
Min Total Open Area
in mm in mm in mm in mm in mm sq in sq in
14 355.6 154 3911.6 24 609.6 32 812.8 32 812.8 260 1040
Table 5.1
26 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
C. Arch / Mailbox Style ShroudThearchormailboxstyleshroudgenerallyhastwosolidsidesandasolidtop.Theexhaustopeningsareonthetwoopenendsofthearch(Figure5.3).Table5.2liststheminimumshrouddimensions,theminimumopenareaperside,andtheminimum total open area for the shroud.
Shaded area represents screened open area. Actual shape of shroud may vary as long as minimum dimen-sions and minimum open area requirements are met.
H
W L
H: Minimum height of shroudL: Minimum length of shroudW: Minimum width of shroud
Figure 5.3 Arch/Mailbox-Style Shroud Minimum Dimensions
Table 5.2
Arch / Mailbox Style Shroud Minimum DimensionsChimney Diameter Chimney Area Min Height H Min Length L Min Width W
Min Open Area per side
Min Total Open Area
in mm in mm in mm in mm in mm sq in sq in
14 355.6 154 3911.6 24 609.6 32 812.8 32 812.8 520 1040
D. Pyramid Style ShroudThepyramidstyleshroudisroughlysquareorrectangularwithanopentopforexhaustaswellasopeningsalongthebaseofthefoursides(Figure5.4).Table5.3liststheminimumshrouddimensions,includingtheminimumheightandlengthofthebaseopening.
Shaded area represents screened open area. Actual shape of shroud may vary as long as minimum dimen-sions and minimum open area requirements are met.
H2
W
B
H1
L
L: Minimum length of shroud top openingW: Minimum width of shroud top openingH1: Minimum total height of shroudB: Minimum length of opening along baseH2: Minimum height of opening along base
Figure 5.4 Pyramid-Style Shroud Minimum Dimensions
Table 5.3Pyramid Style Shroud Minimum Dimensions
Chimney Diameter Min Height H1 Min Length L Min Width W Min Base B Min Height H2in mm in mm in mm in mm in mm in mm
14 355.6 24 609.6 32 812.8 32 812.8 22 558.8 2 50.8
27Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
6 Finishing
A. Finishing MaterialRefertoSections1.B.andSections1.C.forcombustible/non-combustiblematerials.RefertoFigure6.1fornon-combustiblezone.
WARNING! Risk of Fire! You must maintain clearances. • DO NOT covermetalfireplace frontwithcombustible
materials. • Installcombustiblematerialsonlytospecifiedclearances
on top front and side edges.
Metal strips are placed 2 in. (51 mm)under the front of the fireplace and must extend beyond the front and sides offireplace opening by 2 in. (51 mm)
Continuous, non-combustible sealant
Floor constructed of wood or other combustible material
1 in. Micoreor equivilent insulation & 1/2 in. Durock
Bottom of fireplace opening and finished hearth may bethe same height
Finished combustible wall
Combustible material
Non-combustibledecorative facing
Tile, stone or othernon-combustible material
HearthRefractory
2 x 4 header, flush withfront of stand-offs
2 x 4 stud wall
Figure 6.2 Decorative Facing
Note: We recommend mor-tar be applied after facing materials are installed.
• Applymetal lathtothemetalfaceornon-combustibleboardwithcorrosion-resistant,self-drilling,self-tappingscrewscapableofpenetratingthemetalsurfaceofthefireplacefaceinpreparationforfinalfinishingmaterial.
• Completeframingandapplydrywalloverframing.• A bead of 300° Fminimumnon-combustible sealant
mustbeusedtocloseoffanygapsatthetopandsidesbetween the fireplaceanddrywall to prevent cold airleaks.
• Largegapscanbebridgedwithfiberglassropegasket.
These metal surfacesmust be coveredwith non-combustiblematerial. High temperature
sealant around edge of fireplace and drywall.
Figure 6.1 Non-combustible Facing
28 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
The noncombustible finishing material across the top of fireplace opening will be even with lower edge of metal face.
Noncombustible finishing materials MUST overlapside faces by 1 1/4 in. (32 mm) to cover the edges of the panels. Finished opening should be 50 x 38 in. (1270 mm x 965 mm) to allow for door installation.
If Mortar is applied, it should be applied after finishing material is installed. Mortar will be applied between finishing materials and molded brick edges, bottom and sides.
The seam between finishing materials and firebox top must be sealed with non-combustible sealant.
The surface of the finished hearth extension and the surface of the hearth panel should be level.
Figure 6.3 Facing Materials and Mortar
VERY IMPORTANT: Allow the mortar 72 hours to cure before operating the fireplace.
29Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
B. Hearth Extension, Building and Finishing
Table 6.1
R = 1/k x inches of thickness
Table 6.2
WARNING! Risk of Fire! High temperatures, sparks, em-bers or other burning material falling from the fireplacemayigniteflooringorconcealedcombustiblesurfaces.• Protective metal hearth strips MUST be installed.• Hearth extensions MUST be installed exactly as
specified.
Ahearthextensionmustbeinstalledwithallfireplacestoprotectthecombustiblefloorinfrontofthefireplacefrombothradiantheatandsparks.• YouMUSTuseahearthextensionwiththisfireplace.• RefertoFigure6.4forminimumdimensions.• Thisfireplacehasbeentestedandapprovedforusewith
ahearthextensioninsulatedtoaminimumRvalueof2.06.
• ThehearthextensionmaterialMUSTbecoveredwithtile,stoneorothernon-combustiblematerial.
• Manufactured hearthmaterials will usually have apublishedR value (resistance to heat) or k value (conductivityofheat).RefertotheformulainTable6.1toconvertakvaluetoanRvalue,
• Refer to Table 6.2 for hearth extension insulationalternatives.
74 in.(1880 mm)
50 in.(1270 mm)
12 in.(305 mm)
12 in.(305 mm)
20 in. (508 mm) Minimum
Figure 6.4 Standard Hearth Extension Dimensions
* 2 in. (51 mm)
Continuous, non-combustible sealant
Tile, stone or othernon-combustible material
Floor constructed of wood or other combustible material
1 in. Micore and 1/2 in. Durock or equivalent insulation (see Table)
Fire
plac
e
ProtectiveMetal HearthStrip
Durock
**
Note: The bottom of the fireplace opening is 3-3/4 in. (95.3mm) above the bottom of the fireplace. Finished hearth must NOT extend above this level.
Figure 6.5 Standard Hearth Extension Construction
1. Fireplace Installed Flush on the Floor and Hearth Extension Raised to Bottom of Firebox OpeningNon-combustibleflooringaminimumof20in.(508mm)infrontofand12in.(305mm)toeachsideofthefuelopeningisrequired.Thehearth framingmust be constructedof non-com-bustiblematerials(suchasmetalframingorequivalentmaterial)andplacedonHX3(s)orHX4(s)and1/2 in.Durock,orequivalentmaterial.SeeFigures6.4and6.5.When creating the platform, allow for the thickness of the non-combustible finishing materials.Sealgapsbetweenthehearthextensionandthefrontofthefireplacewithabeadofnon-combustiblesealantor grout.
Hearth Extension Insulation Alternatives, R Value = 2.06
Materialk per inch
thickr per inch
thick
Minimum thickness required
Hearth&HomeHX3,HX4 0.49 2.06 1 in.
USGMicore300™ 0.49 2.06 1 in.
USGDurock™CementBoard 1.92 0.52 4in.
CementMortar 5.0 0.20 101/2in.
CommonBrick 5.0 0.20 101/2in.
CeramicTile 12.50 0.08 253/4in.
Armstrong™PrivacyGuardPlus 0.46 2.18 1 in.
Marble 14.3-20.0 0.07-0.05 29 1/2 - 41 1/4 in.
30 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
Note: The bottom of the fireplace opening is 3-3/4 in. (95.3mm) above the bottom of the fireplace. Finished hearth must NOT extend above this level.
Bottom of fireplace opening
Platform must be built to raise the bottom of the fireplace opening to the level of the desired hearth height.
Protective MetalHearth Strips
Floor and platform constructed of wood or other combustible material
Continuous, non-combustible sealant
Tile, stone or othernon-combustible finishing material
Non-combustibleFraming Material
1 in. Micore orequivalent insulation
& 1/2 in. Durock
20 in. minimum Hearth Extension
Noncombustible Framing Material HX4 or
equivalent
Figure 6.7 Raised Platform Hearth Extension-Framing
Non-combustibleFinishing Materials
Figure 6.8 Raised Platform Hearth Extension-Finishing
Figure 6.6 Raised Platform Hearth Extension Detail
2. Raised Hearth Extension and Raised Fire-placeNon-combustibleflooringaminimumof20in.(508mm)infrontofand12in.(305mm)toeachsideofthefuelopeningisrequired.Thehearth framingmustbeconstructedofnon-com-bustiblematerials(suchasmetalframingorequivalentmaterial)andplacedonHX3(s)orHX4(s)and1/2 in.Durock,orequivalentmaterial.SeeFigure6.9.When creating the platform, allow for the thickness of the non-combustible finishing materials.Sealgapsbetweenthehearthextensionandthefrontofthefireplacewithabeadofnon-combustiblesealantor grout.
Figure 6.9 Raised Hearth Extension and Fireplace Framing Materials
Floor
NoncombustibleFraming Material
NoncombustibleFinishing Material
Protective MetalHearth Strips
1 in. Micore and 1/2 in. Durockor equivalent
insulation
20 in. Min.Hearth Extension
Note: The bottom of the fireplace opening is 3-3/4 in. (95.3 mm) above the bottom of the fireplace. Finished hearth must NOT extend above this level.
3. Fireplace Opening and Hearth Extension Flush with the Floor
Non-combustibleflooringaminimumof30in.(762mm)infrontofand12in.(305mm)toeachsideofthefuelopeningisrequired.Thehearth framingmustbeconstructedofnon-com-bustiblematerials(suchasmetalframingorequivalentmaterial)andplacedonHX3(s)orHX4(s)and1/2 in.Durock,orequivalentmaterial.SeeFigure6.10.When creating the platform, allow for the thickness of the non-combustible finishing materials.Sealgapsbetweenthehearthextensionandthefrontofthefireplacewithabeadofnon-combustiblesealantor grout.
31Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
Non-combustible Finishing Material Protective MetalHearth Strip
30 in. Min.Hearth Extension
1 in. Micore and1/2 in. Durockor equivalent
insulation
FinishedFloor
Note: The bottom of the fireplace opening is 3-3/4 in. (95.3mm) above the bottom of the fireplace. Finished hearth must NOT extend above this level. Bottom of
FireplaceOpening
Figure 6.10 Flush Hearth Extension Side View
C. Non-Combustible Sealant Material After completing the framing and applying the facing
materialsovertheframing,abeadofnon-combustiblesealantmustbeusedtocloseoffanygapsatthetopandsidesbetweenthefireplaceandhearth
WARNING! Risk of Fire! • Maintain clearances. • Useonlynon-combustiblematerialbelowstandoffs,
material such as cement board is acceptable. • Framingorfinishingmaterialusedonthefrontof
thefireplacecloserthantheminimumslisted,mustbe constructed entirely of non-combustible materi-als (i.e., steel studs, concrete board, etc.).
WARNING! Risk of Fire! Hearth & Home Technologies is not responsible for
discoloration, cracking or other material failures of finishingmaterialsduetoheatexposureorsmoke.
• Choosefinishingmaterialscarefully.
Non-combustible Sealant
Figure 6.11 Place Non-combustible Sealant
D. Sidewalls/Surrounds• Locateadjacentcombustiblesidewallsaminimumof
24in.(305mm)fromthefireplaceopening.• Mantellegs,surround,stubwall,whethercombustible
ornon-combustible,maybeconstructedasshown inFigure 6.12.
18 1
/2 in
.[4
70 m
m]
19 3
/4 in
.[5
00 m
m]
4 in
.[1
02 m
m]
50° angle
39° a
ngle
24 in
.[6
10 m
m]
BRIC
KFR
ON
TFL
USH
FRO
NT
24 in
.[6
10 m
m]
22 3
/8 in
.[5
68 m
m]
60-7
/8 in
.(1
546m
m)
50 in
.[1
270m
m]
Not
e: G
rid d
epic
ts 1
inch
squ
ares
.
Figure 6.12 Mantel Leg, Surround or Wall Projections (ac-ceptable on both sides of opening)
32 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
7 ft (2134 mm)minimum
base of fireplaceto ceiling
Combustible Wall
2 x 4 stud wall
Standoffs
Measured from top of fireplace opening
12 in./305 mm
1 1/2 in./38 mmmaximum
Mantel
22 in./559 mmminimum
Combustible Decorative Facing
6 in./152 mmminimum
12 in./305 mmminimum
Grid represents1 in. squares
Non-combustibleDecorative Facingsuch as:Steel, iron, brick,tile, concrete, slate,glass, plasters. DO NOT cover any air openings in the faceof the fireplace.
Seal joint with non-combustiblesealant to prevent heat from beingdrawn into the wall cavity.
E. Mantel and Wall ProjectionsAcombustiblemantelmaybepositionednolowerthan63-3/4in.(1619mm)fromthebaseofthefireplace.Thecombustiblemantelmayhaveamaximumdepthof12in.(305mm).Combustibletrimpiecesthatprojectnomorethan1-1/2in.(38mm)fromthefaceofthefireplacecanbeplacednocloserthan6in.(152mm)fromthetoporsideofthedecorativefront.Combustibletrimmustnotcover:• themetalsurfacesofthefireplace,• where the non-combustible board is placedover the
metal surfaces,• thespacebetweenthemetalfaceofthefireplaceand
framingmembers.
Figure 6.13 Mantel Specifications
WARNING! Risk of Fire! • Youmustsealaroundthefinishingmaterialtofireplace.
Non-combustible mantel may be positioned anywhere within the shaded area.
7 ft (2134 mm)minimum
base of fireplaceto ceiling
Non-Combustible Wall
Metal stud wall
Standoffs
Measured from top of fireplace opening
12 in./305 mm
22 in./559 mmminimum
Combustible Decorative Facing
12 in./305 mmminimum
Non-CombustibleDecorative Facingsuch as:Steel, iron, brick,tile, concrete, slate,glass, plasters.
Seal joint with non-combustiblesealant to prevent heat from beingdrawn into the wall cavity.
Non-combustible Mantel
12 in.(305 mm)
Deep
Non-Combustible Decorative Facing to top of standoffs
above the fireplace up to ceiling (7 ft. min.)
Metal support to stablize wall and mantel
Figure 6.14 Mantel Specifications - Non-Combustible
33Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
LH Traditional Refractory
Back Traditional Refractory
Hearth
Grate Retainer
Refractory Clips
LH HerringboneRefractory
Back HerringboneRefractory
Hearth
Grate Retainer
Refractory Clips
7 Fireplace Setup
A. Install Hearth Molded Brick Panel• Placehearthpanelintothefireplace.
B. Install Back Molded Brick Panel• RemoveScreenRods• RemoveSmokeshield• RefertoFigure7.1.• Setthegratebracketsinplace,26.5in.(673mm)center
to center. • Installthebackpanel.Centerfromsidetoside.• Install two refractory clips in the mortar lines across the
top.Tightentheseandallpreviouslyinstalledbrackets.
C. Install Side Molded Brick Panel• Ifagaslineistobeinstalled,removetheknockoutsin
the innerfireboxand in theoutershellon thesideofyour choice. Refer to dimension drawings for location ofknockoutsandSection7.I.forgasprovisions.
• Install side panel, tapered edge to the front. Align the frontedgewiththefrontofthecolumn(orbuttedtothesurroundifinstalled).
• Install two refractory clips in the mortar lines across the top.Tightentheseandallpreviouslyinstalledbrackets.
• Installsecondsidepanelfollowingthestepsabove.• Replacesmokeshield.
Figure 7.1 Traditional Molded Brick Panel Figure 7.2 Herringbone Molded Brick Panel
34 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
D. Install Screens• Layonescreenpanelflatandslide the roundendof
the rod through the rings starting at the handle side of screen.Leavethelastringofftherod.
• Inserttherodthroughtheholeinthebracket.Slipthelastringovertherodontheothersideofthebracket.
• Fastentheflatendofthescreenrodbackinplaceusingthescrewremovedearlier.
• Repeat for the other screen panel.
Cen
ter o
f Fire
plac
e O
peni
ng
Round end of Rod through rings, then into Screen Rod Clip
Rod ScreenClip
InsideFirebox
Top of Fireplace
E. Install Mortar (Optional)Thebrickpanelshavebeendesigned for installationwithouttheuseofmortarbeingnecessary.Ifthelookofmortarispreferred,itisavailableandcanbeinstalled.Followthedirectionsonthecontainerformixing.
F. Grate• Installthegrateifagaslogsetisnotgoingtobeinstalled.• PositionthereargratebarintheGrateRetainer.• Positionthetopofthegrateretaineroverthereargrate
barandfasteninplacewithscrewprovided.
Figure 7.3 Install Screens
Note: Herringbonerefractorymayrequiretwobucketsofmortar.TheTranditionalrequiresonlyone.
35Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
G. Gas Log/Lighter ProvisionWARNING! Fire and/or Asphyxiation Risk! Use with solidwoodfuelordecorativegasapplianceonly.Gasfiregenerates fumes.• Damper must be locked fully open when gas logs are
installed
Firebox
Repackinsulationknockout
Combustible materials
Maintain air clearance to combustibles.
Gas line
Combustible materials may be located at zero clearance to gas line beyond 4 in. (102 mm) from fireplace side.
Gas line
1 1/2 in. (38 mm)air space aroundpipe
Refractory
Seal withfireplace mortaror non-combust-ible sealant
4 in. (102 mm)
Outer shellof fireplace
Figure 7.4 Gas Line Installation
H. Wood Burning InsertsWARNING! Risk of Fire! Improper installation of wood in-sertsmaycausefireplaceorchimneysystemtooverheat.
Ifawoodburninginsertisbeinginstalledinthisfireplace,Hearth&HomeTechnologiesrecommendsfullrelineofthe chimney.• Cooling air openings at the top of the chimney must not
beobstructedinanymanner.• Hearth&HomeTechnologiesrecommendssecuringthe
relineatthetopoftheflueandusingthecapcertifiedforusewiththisfireplacesystem.
Figure 7.5 Gas Line Dimples
Acertifiedgasloglighterordecorativegaslogsetcanbeinstalledinthisfireplace.
Vented Gas Logs
Unvented Gas Logs CAUTION! Ifanunventedgasapplianceisinstalledin
thefireplace,thegasappliancemustonlybeoperatedwith the fireplace glass door fully open (if included).Onlyunventedgaslogsetswhichhavebeenfoundtocomplywith thestandard forunventedroomheaters,ANSIZ211.11.2,aretobeinstalledinthisfireplace.Ifanunventedgasapplianceisinstalleditmustincorpo-rateanautomaticshutoffdevice,andmustbeinstalledinaccordancewiththeNationalFuelGasCodeZ223.1,Latest edition.
• Maximuminputis100,000BTU/hr.• Decorative gas appliancemust be certified toANSI
Z21.60/CSA 2.26 “Standard for Decorative GasAppliancesforInstallationinVentedFireplaces”.
• MustbeinstalledinaccordancewiththeNational Fuel Gas Code, ANSI Z223.1 and Natural Gas Installation Code, CAN/CGA-B149.1-M95 or the Propane Installation Code, CAN/CGA-B149.2-M95.
• Agaslogsetmustincorporateagasshutoff.• GasLogsetrequiresthedampertobelockedfullyopen.• Alistedautomaticdampersystemwithsafetyinterlock
may be used in this fireplacewith only compatible,listed gas log sets. See damper system manufacturer’s instructions.
• Knockoutsareprovidedonbothsidesofthefireplaceandinrefractoriesfor1/2in.(13mm)ironpipe.
• Seal refractoryaroundpipewithfireplacemortaroranon-combustiblesealant.
WARNING! Do Not operate an unvented gas log set in this fireplacewiththechimneyremoved.
Gas Line Dimple
Gas Line Dimple
36 Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
8 Reference Materials
B. Optional Components
20 in.(508 mm)
66 in.(1676 mm)
1/2 in.(13 mm)
HX4 Hearth Extension
UD6 Uninsulated Duct
42 in.(1067 mm)
42 in.(1067 mm)
6 in. (152 mm) i.d.
ID6 Insulated Duct
6 in. (152 mm) i.d.
(Required/shipped separately)
DFG4050 Series Glass Doors(optional)
DFS4050 Series Screen Doors(optional)
A. Chimney Components
Catalog # Description14DCA-12 Pipe 12 inch
14DCA-18 Pipe18inch
14DCA-36 Pipe36inch
14DCA-48 Pipe48inch
14DCA-E15 15degreeElbow
14DCA-E30 30degreeElbow
14DCA-ES ElbowStrap
14DCA-SS Supplementary Support
14DCA-ST Stabilizer
14DCA-FS Firestop
14DCA-IS Insulation Shield
14DCA-RRS Roof Radiation Shield
14DCA-CTF ChaseTopFlashing
14DCA-VC1 Chimney Cap
14DCA-SC Storm Collar
14DCA-WS WallStrap
14DCA-CTC ChaseTopCollar
CT14-A Adapter-mayonlybeusedwiththefollowing copper caps
CT-King
CT-BishopI
DTO146-CP DecorativeCap
DTS146-CP DecorativeCap
14 in.(356 mm)
-i.d.-
17 in.(432 mm)
-o.d.-
Duravent Pipe Dimensions
B
A
C
B
C
A
DTS146 DTO146Decorative Caps
A B CDTO146in 46 22.7 26mm 1168 576 660
DTS146 A B Cin 46 21.18 26mm 1168 538 660
►
37Heatilator • Birmingham BIR50-B Installation Manual • 4059-701• Rev U • 07/20
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