W Our Classic offers you an alternative that will save...

Welcome to Central Boiler! We have been in businesssince 1984 and are one of North America's largestmanufacturers of outdoor wood furnaces. Our productsare continually improved and refined. We make it ourgoal to provide our customers with the finest outdoorwood furnaces available anywhere. For you as a consumer,wood heat offers many advantages. Wood is renewable,inexpensive and often free. Conventional sources of heatsuch as propane, natural gas, fuel oil and electricitydeplete our irreplaceable fossil fuels. They are also subjectto constant price fluctuations. Our Classic outdoor woodfurnace takes the age-old idea of burning wood andmodernizes it. By keeping the fire outside the home, iteliminates the dangers and mess associated with traditional

indoor wood stoves. Our innovative, industry-leadingdesign maximizes efficiency. It provides a heat sourcefree of foreign nation influence and “the grip of big oil.”Our Classic offers you an alternative that will save youmoney. In these pages you will find the latest models inour Classic line of outdoor wood furnaces and the PalletBurner model as well. You will get answers to questionsyou may have about our clean, efficient approach to woodheat. Please browse through this brochure to learn howyou can benefit from a Classic outdoor wood furnace foryour home or business.

Please note thatwood should beplaced no closer than 18 inches from the furnace.

2

Model CL 5648

CentralFlex™ insulated pipe can also be used aboveground for quick, temporary winter installs.

For illustration purposes only.

Testimonial-

“I have been a volunteer fireman for 8 years.

Many people in this area heat with wood, most

still indoors. This stove can surely save lives and

homes.”

Michael, Minnesota

3

The Classic Outdoor Wood Furnace Can Work for You

The Classic outdoor wood furnace is installed outside, typically 100to 200 feet (but as far as 500 feet) away from your home or business,and works with any existing heating system. A water jacketsurrounds the furnace firebox and heated water is pumped to thehome or building through insulated underground tubes. Water-to-airor water-to-water heat exchangers or direct circulation conveys theheat into the structure’s forced-air furnace, boiler or radiant floorheating system. This allows for normal thermostatic control oftemperature for safe, even and comfortable heat. The ability to heatmultiple buildings and domestic water can eliminate your heatingbills. Outside burning removes the threat of devastating chimneyfires and the dangerous carbon monoxide buildup or oxygen depletionwhich affects your indoor air quality. It also eliminates the smoke,ashes, odors and soot buildup on walls and ceilings inside your homethat indoor burning creates.

Hot

Water toWater Heat Exchanger

Hot Supply from Pump on Outdoor Wood Furnace

WaterHeaterReturn

Optional Bypass Valve

Bypass Line

Plenum

Forced AirFurnace

1" Central PEX

Tempering Valve(Anti-Scald)

Heat Exchanger for outdoor wood furnace

For illustration purposes only, water heater styles may vary.

This horizontal assembly must not exceed a height of 4 inches above topof water heater.

NOTEInstaller must complywith all applicable local,state and federal codes.

Forced Air System with Water Heater

Testimonial-

“Since installing the Central Boiler, I’ve saved

between $300-$400 per month by not having to

purchase propane.”

Don, Connecticut

System IllustrationWelcomeSystem Installation View Forced Air Illustration . . . . . . . . . . . . . . . . . 2, 3

Classic CutawayDetail Drawing . . . . . . . . . . . . . . . . . . . . . . . 4

Classic QualityCast Iron DoorInsulation ComparisonRevolutionary Firebox DesignCompetitors’ Inefficiency . . . . . . . . . . . . . . . . . 5

Test LabFuel Cost Comparison . . . . . . . . . . . . . . . . . . 6

Dual Fuel SystemDetailed ViewsGeneral Information . . . . . . . . . . . . . . . . . . . 7

Classic FeaturesDetailed ViewSide Panel Pump Cover . . . . . . . . . . . . . . . . . 8

Parts and AccessoriesHydronic Forced Air HeatersSample Parts List . . . . . . . . . . . . . . . . . . . . . 9

Models & SpecificationsDimensions and Specs for Specific ModelsBurn Time FactorsFurnace Sizing WorksheetFoundation DimensionsColor Options . . . . . . . . . . . . . . . . . . . 10, 11

IllustrationsForced Air vs. Radiant In-Floor ChartRadiant Heat-Multi Zone In-FloorSingle Zone 8-Loop with Water Heater . . . . . . . 12

Greenhouse/Suspended Space HeaterMultiple Buildings . . . . . . . . . . . . . . . . . . . . 13

Pools/Hot TubsExisting Boiler Directly PlumbedExisting Boiler Pressurized . . . . . . . . . . . . . . 14

Baseboard/Forced AirIn-Floor Radiant/Forced Air . . . . . . . . . . . . . . 15

Central Boiler Classic®

General Information . . . . . . . . . . . . . . . . . . 16

What’s InsideWhat’s Inside

For a closer look at other heating applications, refer to pages 12-15.

4 centralboiler.com

Vent CapDesign eliminates evaporation.

High Capacity Water JacketReceives multiple tests to ensure weldingintegrity. Certified high quality steel used -no mixed metals.

Ripple Top DesignFor increased heat transfer area andlower maintenance.

Water-Filled HeatLock BaffleCreates secondary combustion area. Trapsheat in firebox - won’t warp or burn out withextreme heat.

Large, Insulated Cast-Iron DoorErgonomically designed with a large doorfor easy loading. Door is insulated formaximum efficiency. Door parts are powdercoated for increased paint durability.

Automatic Draft ControlThermostatically controls water temperaturein system.

Skid Base FrameworkMakes installation easy with or withoutcement foundation. Only the CL 7260 andPallet Burner require a slab.

Welded Steel FrameworkHeavy-gauge framework engineered forenhanced strength of side panels and roof.

Insulated ChimneyThe chimney is a certified factory-builtchimney for wood burning appliances. Two4-foot chimney sections are standard.

Rear Exhaust OutletIncreases efficiency and eliminates leakyseal of chimney through roof. Designed tobe easy to inspect. Reduces heat loss byover 50%.

Urethane Foam InsulationInsulation is sprayed on and forms a 100% air tightseal around the water jacket.

Rectangular FireboxEngineered with stay pins - won’t collapse likeround designs can.

Ash Pan3/8" thick, formed ash pan is durable and easy toclean (1/4" thick, formed ash pan on stainlesssteel models.)

At Central Boiler, Inc., we created the standard that others wish they

could meet, and we build it everyday. We rely on scientific testing to

accurately verify the performance of our furnaces, which continues to

set the highest performance levels in the industry. Our line of outdoor

wood furnaces is unmatched! We have a better design and a more

efficient firebox thanks to our exclusive Ripple Top® construction and

water-cooled HeatLock Baffle™. We spray on waterproof urethane

insulation to keep the heat in and we use industrial-quality siding to

withstand the elements and time. That all adds up to faster recovery

times and less wood consumption. The large, insulated cast-iron door

has the Central Boiler name proudly embossed on it. Our furnaces

offer more surface area between the water and the fire to achieve better

heat transfer. Better design, more insulation, more heat and the best

recovery time...there is only one company that can deliver it all:

Central Boiler.

Testimonial-

“We are very happy with our Central Boiler furnace.

The wood and mess are all outside, also the house is

very comfortable.”

Bruce, Ontario

Secondary Combustion Areawith intense heat collection

and transfer surfaces.

Secondary Combustion Areawith intense heat collection

and transfer surfaces.

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Most Efficient Firebox DesignOur water-filled HeatLock Baffle traps heat and gases in the top of thefirebox for the most complete combustion and heat extraction. TheRipple Top design provides optimum heat transfer surfaces in the mostintense heat collection area.

2

Creating the Standard

1

7Model CL 5648

There is no match for the urethane insulation we use on our furnaces.The sprayed-on urethane foam insulation provides a waterproof, airtightbarrier that does not degrade or compress like fiberglass batt insulationdoes. The urethane foam provides 2-3 times the effective “R” value ofconventional fiberglass batt insulation. Consider that the most efficientwater heaters use urethane foam.

Dry BafflesCan Warp and

Burn Out

Intense HeatEscaping

Intense HeatEscaping

Batt InsulationSettles




Rain LeakageCauses Corrosion

Rain LeakageCauses Corrosion

Exhaust Flue -High Maintenance,Must Be CleanedRegularly

Barrel Stove (drum)

Boiler Flue

Barrel stove (drum) and boiler flue firebox designs donot gasify, collect and burn the combustion gases likethe Ripple Top and HeatLock Baffle firebox design. Achimney in the top of the firebox (or exhaust flues usedfor heat transfer) can leave the fire behind tryingto catch up to the unburned gases. In some cases,combustion actually occurs either in the chimney or inareas where the heat is not recoverable. This meansincreased wood consumption, more frequent fillings andhigher emission rates. Inefficient firebox designs canincrease wood consumption, yet deliver less heat. Drybaffles reach temperatures over 1000°F, resulting inwarping and burn out.

Competitors’ Inefficiency

The Ripple Top® and HeatLock Baffle™ producemaximum heat transfer. This design “raised the bar”and created a new standard for the wood heatingindustry. The Classic is unmatched in efficiency andease of use. Our exclusive HeatLock Baffle alsocreates a secondary combustion area by trappinggases in the firebox for optimum combustion and heattransfer. A water jacket surrounding the entirefirebox allows heat transfer from all sides includingthe coal bed. The chimney exits out the rear ofthe firebox eliminating corrosion that competitorsexperience from top-exiting chimneys.

Revolutionary Firebox Design

HeatLockBaffle

TrappedGasesCreate

SecondaryCombustion

Sprayed-onUrethane

Insulation

Insulated Cast Iron DoorThe Classic offers an insulated door that is built to last. Each door is a moldedpiece of cast iron with hinges measuring 5/8" thick. The door is molded witha recessed cavity which holds 2 inches of high quality insulation. The dooralso houses the draft opening. Each door’s draft seat is machine milled to1/1000" to ensure the proper seal of the damper. The damper is connected toan electronic solenoid using a steel linkage. The linkage is held in place byhardened cotter pins.

The door’s outside steel cover and louvered draft enclosure are cut and formedusing state-of-the-art production machinery for the best fit and finish.

The casting provides a uniform groove for the door gasket. The gasket performance is further enhanced with the unique Cam Loc® door latching system.This latching system guarantees a tight seal each time the door is closed.

5

6 centralboiler.com

Central Boiler’s Test Laboratory

Testimonial-

“Before, with our two indoor wood stoves, we

had problems with smoke in the house, soot,

and dirt. We were concerned about how safe

they were, and we had to load them every three

hours. With our Central Boiler Classic outdoor

wood furnace, we feel much safer, and we only

have to load it about every two days. Also, my

son has asthma, and since we got the outdoor

furnace, he’s had fewer problems. I think it’s

because the air is much cleaner inside now.

That was a real unexpected benefit. Probably

the best one of all.”

Amy, Vermont

Fuel Cost ComparisonCost Heat and Hot Water

Fuel Per Unit* Annual Fuel Cost

Wood (Free) . . . . . . . . . . . . . . .$0.00 . . . . . . . . . . . . . . . . . . . . . . . . . . . .$0.00

Wood (Oak) . . . . . . . . . . . . . . . .$50.00 Cord . . . . . . . . . . . . . . . . . . . . .$479.00

Fuel Oil . . . . . . . . . . . . . . . . . . .$2.07 Gallon . . . . . . . . . . . . . . . . . . . .$2583.41

Natural Gas . . . . . . . . . . . . . . .$1.26 Therm . . . . . . . . . . . . . . . . . . .$2,781.60

Propane . . . . . . . . . . . . . . . . . .$1.99 Gallon . . . . . . . . . . . . . . . . . . .$3,845.54

Electricity . . . . . . . . . . . . . . . . .$0.11 KWh . . . . . . . . . . . . . . . . . . . . .$4,716.25

The average home uses 100 million Btu annually for heating.

*New Hampshire Office of Energy and Planning

Within Central Boiler’s Research and Development Department lies the mostcomplete testing laboratory in the industry. Over the years, Central Boiler hasdeveloped many industry firsts including the exclusive Ripple Top® design,HeatLock Baffle™ and a long awaited, reliable dual fuel system. Since 1984, ourR&D Department has been developing and testing products before the changesreach the assembly line. This facility has the ability to collect and analyze a widerange of data, including emissions and efficiency. This state-of-the-art TestLaboratory allows our highly skilled engineers to develop the best. At CentralBoiler, research, development, testing and refining are part of the everyday process- not a one time event.

The Dual Fuel System gives the consumer the choice of four different

modes of operation.Central Boiler, known for their innovations in woodheating technology, has developed a Dual Fuel Readymodel which allows the furnace to be fitted with a FuelOil, Natural Gas or Propane burner. The Dual FuelSystem has four modes of operation; Wood Only, CleanStart™, Dual Fuel Backup and Fuel Oil/LP/NG.Laboratory tests have shown efficiencies over 85%with these fuels. This flexible Dual Fuel System allowsyou to adapt the furnace to your individual heatingneeds. The Dual Fuel Ready furnace allows for easyinstallation of the oil or gas burner (not included infurnace price).

Model CL 5648

Dual Ready Models

Dual FuelBurnerInstalled

Ripple Top® Design

HeatLock Baffle™

The Dual Fuel System control switch is located on theexterior of the side panel pump cover. Pertinentinformation for the Dual Fuel System is mountedinside the panel.

7

Wood The most economical choice. The woodmode allows the user to operate the furnace burningonly wood. Heating with wood is endorsed by theU.S. Forestry Service and the Union of ConcernedScientists.

Clean Start This wood burning mode allows theDual Fuel burner to operate for a selected periodof time at the beginning of each burn cycle tocreate immediate high temperature in the secondarycombustion area of the Ripple Top and HeatLockBaffle firebox design. This mode also providesautomatic backup with alternate fuel.

Dual Fuel Backup This mode automaticallyinitiates the Dual Fuel burner as a backup if theoperator does not refuel the furnace with wood.

Fuel Oil - LP/NG This mode allows operation ofthe furnace when not firing with wood. The LiquidPropane, Natural Gas and Fuel Oil burners are shippedwith a 150,000 Btu rating and may be increased forcertain applications.

For more information about this option, please contact your local dealer. Please reviewthe owner’s manual for installation andoperation specifications.

Dual Fuel BurnerAvailable in your choice of

LP, NG or Fuel Oil.

Draft Controlled Fuel NozzleUS patent number 6718889 B1

Fuel oil must be at proper viscosity to operate correctly.

1. Lift Tab Braced and welded directly to firebox and water jacket.2. Vent Cap Eliminates evaporation.3. Two 4-Foot, Certified, Factory-Built, Durable Chimney

Sections Easy extensions.4. Front Night Light5. Urethane Foam Insulation Best R value.6. Molded Plastic Corners Installed for safety, fit and a great

finished look.7. High Capacity Water Jacket Made of heavy-gauge steel or

titanium enhanced stainless steel.8. Water Level Sight Gauge Located in front for easy monitoring

of water level. Valve to collect water for testing.9. Ripple Top® Design Ultimate heat transfer.

10. Adjustable Digital Temperature ControllerAdjustable temperature settings.

11. HeatLock Baffle™ Traps gases for secondary combustion.12. Side Light Mounted on side panel pump cover.13. Large, Insulated Cast-Iron Door 14. Cam Loc® Door Closure The specially designed curved ends

of the door latch fit precisely around the adjustable, sealed roller bearings, to guarantee a tight seal each time the door is closed.

15. Side Panel Pump Cover16. Automatic Draft Control Solenoid is protected by louvered

draft cover.17. 3/8-Inch Thick Easy Clean Ash Pan18. All-Weather Steel Siding All siding is overlapped for tighter

weather seal. All panels and corners are fastened with high- quality coated screws for greater durability.

19. Skid Base Framework For easy installation with or without cement foundation (CL 7260 and Pallet Burner require a slab).

20. Instruction Labels For operating, installation and maintenance instructions and wiring schematics.

21. Power Disconnect Switch To shut off main power to furnace.22. Convenient Holder For water test kit and owner’s manual.

Testimonial-

“I am heating two homes and a shop all from my Central

Boiler furnace. My home is an estimated 4000 square feet

and my father’s home is 2000 square feet and I also heat

a shop that is 1000 square feet. I get 24 to 48 hour burn

times heating all three buildings.”

Charles, Arkansas

The Classic comes standard with an adjustable temperature controllerwith a digital temperature gauge and a multi-function light switch.

The light switch allows both lights to be manually controlled in the ON or OFFpositions and also provides an automatic setting that controls the front light witha photo sensor. The adjustable temperature controller allows the user to adjust theoperating temperature of the furnace within a specific range of operation.

Adjustable digital temperature controller with LED display

Central Boiler has developed a side panel pump cover formore convenient installation and easy access to pumps andpower disconnect. It also provides a convenient location forthe owner’s manual and water test kit. The hinged cover hasa handle that can be locked for safety and security.

Shown withoptionsinstalled.

Side Panel Pump Cover

Model: CL 5648

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87

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13

18

5

14

2021

22

19

17

16

10

8 centralboiler.com

For the maximum performance and life of your furnace, always insiston using Central Boiler authorized system parts and accessories.

There is no need to chase from here to there for your parts, accessories and maintenance tools. Central Boiler has them all.Central Boiler has thousands of square feet of space dedicated toinventory which our dealer network may access. Overnight, second day, three day, and ground delivery are available to our dealers five days a week.

To locate your nearest Central Boiler dealer, either visit our website at centralboiler.com and use the dealer locator or call 1-800-248-4681.

Testimonial-

“I can place an order with Central Boiler

and it gets shipped the same day.”

Scott

Central Boiler Dealer

Sample Parts List For Forced Air Heating System

Qty p/n Description1 107 125,000 Btu Heat Exchanger Coil1 2053 Domestic Water Heater Fittings Kit1 591 Domestic Water Heater Pipe, 40"1 171 Circulation Pump1 223 Flange Set1 189 24 V Thermostat1 118 3/4" Close Nipple2 198 3/4" Ball Valve6 1330 3/4" MPT x 1" Pex Adapter8 5926 Crimp Rings* CentralFlex™ Insulated Pipe1 396 Spark Arrestor (Optional)1 296 Check Valve

165 Rust Inhibitor1 297 Ashtrol1 308 Hoe1 300 Rake1 299 Shovel1 6593 Ground Rod Kit

Illustration for forced air heating system is located on page 3.

* Installation distance to the furnace will determine the quantities.Consult dealer on insulation options available.

A perfect solution to warm up those cold spots in your home.Whether it is your entry, kitchen or patio door area these fanforced hydronic heaters will provide comfort that's efficient,quick and easy to control. They are quiet, elegant, stylish, anddesigned to blend in making the best possible use of space.

A Complete Line of Parts and AccessoriesFan Forced Hydronic HeatersAll-Around Comfort That's Quick and Easy to Control

Kickspace Hydronic HeatersDesigned to fit under cabinets or in other spaces.

Fan Unit

Hooks up toCentral PEX®

Heat Exchanger

9

Hot WaterSupply and

Return Pipes

Fuel Type

Furnace Sizing Worksheet - Using Previous Heating History Including Water Heater

New, Well-Insulated Homes & Buildings**New, Well-Insulated Homes & Buildings**

Fuel Oil

Units gallons

Propane

gallons

Natural Gas

cubic feet, therms

Electricity

kilowatts

Wood*

cords

Units per Month

Suggested Sizing RangeFurnace

250-450

250-600

500-1800

SCL 5636

0-300CL 4436

CL 5648/SCL 5648

CL 7260, Pallet Burner

Compare your Total Sizing Value to the Suggested Sizing Range for the listed models.

Many people choose the next larger model for extended burn times.

* Full cords of medium to high-quality wood.

**Improperly insulated radiant slab heating can dramatically affect sizing requirements and heat load.

Be sure to consult your dealer when sizing. Previous heating efficiencies and heat loss need to be considered when sizing a furnace. This is only a guideline.

New well-insulated buildings with R28 walls, R40 ceilings, insulatedbasement walls. Normal sizing allows for one picture window and one patiodoor. Calculation does not allow for extremely large glass or air exchangeheat losses. Homes that are not well insulated are not applicablein this calculation. Use previous heating history to determine sizing.

Multiplier x 1.18 x 0.78 x 0.87/therm x 0.037 x 150x 0.0087/cu.ft

Sizing Value

Total sq. ft.

Multiplier x 0.06

Total Sizing Value

Total Sizing Value

10 centralboiler.com

SCL 5636 (Titanium Enhanced Stainless Steel)Maximum Btu . . . . . . . . . 350,000Door . . . . . . . . . . . . . . . 23" x 23"Firebox . . . . . . . . 56" x 36" x 30"Heat Transfer Area . . . . . 72 sq. ft.Weight . . . . . . . . . . . . . 1,410 lbs.Water Capacity . . . . . 225 GallonsReplaces up to 350 gallons of fuel oil per month.

Firebox size is between the CL 4436and the CL 5648. Applications willperform accordingly.

Testimonial-

“It cut my wood usage to

less than half. Two people I

work with each have a

Classic. We are all totally

satisfied.”

William, Wisconsin

CL 4436Maximum Btu . . . . . . . . . 250,000Door . . . . . . . . . . . . . . . 23" x 23"Firebox . . . . . . . . 44" x 36" x 30"Heat Transfer Area . . . . . 64 sq. ft.Weight . . . . . . . . . . . . . 1,580 lbs.Water Capacity . . . . . 185 Gallons

Replaces up to 250 gallons of fuel oil per month.

Actual Classic Owner Testimonials-

• Poorly insulated home with high heat loss- 12 hour burn time at -20°F.

• Well insulated home with minimal heat loss- 48 hour burn time at -20°F.

• Home, workshop and domestic hot water- 24-48 hour burn times.

• Home, garage, swimming pool- 24 hour burn time.• Well insulated low heat loss home- 96 hour burn time.(Burn times per load will vary based on heat demand and furnace size.)

Central Boiler Has AFurnace For You

CL 5648Maximum Btu . . . . . . . . . 500,000Door . . . . . . . . . . . . . . . 23" x 31"Firebox . . . . . . . . 56" x 48" x 36"Heat Transfer Area . . . . 114 sq. ft.Weight . . . . . . . . . . . . . 2,360 lbs.Water Capacity . . . . . 385 GallonsReplaces up to 500 gallons of fuel oil per month.

SCL 5648 (Titanium Enhanced Stainless Steel)Maximum Btu . . . . . . . . . 500,000Door . . . . . . . . . . . . . . . 23" x 31"Firebox . . . . . . . . 56" x 48" x 36"Heat Transfer Area . . . . 114 sq. ft.Weight . . . . . . . . . . . . . 1,920 lbs.Water Capacity . . . . . 385 GallonsReplaces up to 500 gallons of fuel oil per month.

Performance is equal to the CL 5648.

11

Charcoal

* Cement slab foundation optional on these models.

72"

50"

Front 6"

24"

15"

2"

Optio

nal

60"

50"

Front 6"

24"

15"

2"

Optio

nal

CL 4436*Foundation Dimensions

72"

62"

6"

15"

Front

24"

2"

Optio

nal 91"

73"

Front

24"

8"

5"

2"

Optio

nal

CL 5648*and

SCL 5648*Foundation Dimensions

CL 5636*Foundation Dimensions

The Pallet Burner and

CL 7260 Foundation Dimensions

Forest Green

Brown

Red

Mocha Tan

Ocean Blue

Black

White

Foundation Dimensions(All foundation dimensions are shown in inches)

Select the color that best coordinates with your landscape.

A Wide Range of Color Options

Furnace must be installed on a non-combustible surface or foundation thatincorporates an enclosure that will prevent supply and return lines from anypossible exposure to sunlight, fire, or physical damage that may be causedby an occurrence outside the furnace enclosure.

CL 7260Door . . . . . . . . . . . . . . . 30" x 40"Firebox . . . . . . . . 72" x 60" x 40"Heat Transfer Area . . . . 170 sq. ft.Weight . . . . . . . . . . . . . 3,910 lbs.Water Capacity . . . . . 764 GallonsReplaces up to 1,500 gallons of fuel oil per month.

Dual Fuel Ready Standard.

This is an outdoor wood furnace intended for more than residential heating.

Pallet BurnerThe business solution for high-capacity commercial or industrial use. Burns pallets, wood remnants, cord wood, non-treated woodpacking crates and more. Forklift or hand-loading.

Door . . . . . . . . . . . . . . . . . 54" x 50"Firebox . . . . . . . . . . 72" x 66" x 54"Weight . . . . . . . . . . . . . . . 4,880 lbs.Water Capacity . . . . . . 556 GallonsOne year warranty.Dual Fuel Ready Standard.

CL 7260 and Pallet Burner models are shipped with fan draft as standard equipment.Fan draft option available for all models.Skid base frame under CL 7260 and Pallet Burner does not provide enclosed access areaunder furnace.CL 7260 and Pallet Burner are to be installed on a concrete foundation.

Specifications and design may change without notice. Talk to your local dealer aboutproper furnace sizing.

Testimonial-

“We own a CL 5648 and to say that the furnace has

made a difference in our lives would be a huge

understatement. Our first [electric heat] bill for

the house, the computer rejected it and I had to call

them to see what was wrong. The lady explained

that there had to be something wrong with the

meter. Well for the next five weeks they came to my

house to read the 'defective' meter every three days

to finally realize that the furnace was making all

the difference.”

Jean, Quebec

From supply pump on furnace

This horizontal assemblymust not exceed a heightof 4 inches above top ofwater heater.

TopView

TopView

Domestic WaterHeater

Supply

Return

Return

Water to WaterHeat Exchanger

1" Central PEX

1" CopperTubing

Cold

RW

ZoningPump

Mixing Valve

W

W

W

R

R

R

Mix

Hot

Zoning Pump

ON

1 2 3 424 Volt Thermostat

1/2" Central PEX

NOTE

NOTE

For this system to work properlyit must be installed as shown.

NOTE4 x Pipe Dia. Max.

If heating loops are above manifolds additional controls may be needed to

prevent ghost flow.

ON / OFF switch mustbe in the "ON" position

for this install.

NOTE

TopView

(e.g., for 1" pipe, fittings mustnot be more than 4" apart)

Radiant HeatSingle Zone 8-Loop with Water Heater

Reflective Insulation

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80

86102

7667676565

Radiant In-FloorForced Air VS.

Central Boiler outdoor wood furnaces can be used in a

variety of heating applications.

Multi Zone In-Floor with

Snow Melting Loop


© 2004 Central Boiler

Heat For Multiple BuildingsForced Air System

Suspended Space Heater

Greenhouse Heating OptionsSuspended Space Heater

OUT

IN

Radiant PEX Tubing under the table

Forced Air

ReturnSupply

When using mesh styletables - PEX tubing must be protected from UV rays.

ie: 4 mil. black poly

NOTE

Fin Tube


Testimonial-

“We had been using propane to heat

our greenhouse for the past few years.

Since installing our Central Boiler

outdoor wood furnace, we’re saving

over $600 per month.”

Bob, Wisconsin

Testimonial-

“We purchased [a CL 4436] and have

been very happy with the results, our

water heater and the gas furnace haven’t

run since...and the house is very warm.”

Tony, Wisconsin

centralboiler.com 13

Wraparound Pump-runs continuously, circulatingthrough the water to waterheat exchanger maintainingthe water temperaturein the existing boiler.

ExistingBoiler

ExistingPump


Existing BoilerPressurized

ExistingBoiler

WaterHeater

Return

HotSupply

Hot Supplyfrom Outdoor Wood Furnace

1" Central PEX


Hot Supply must enter top of existing boiler.Return must exit bottom of existing boiler.

NOTEFor illustration

purposes only, waterheater styles may vary.

This horizontal assemblymust not exceed a height of 4 inches above top of water heater.


NOTEInstaller must comply with all applicable local, state and federal codes.


Existing BoilerDirect Plumbed

Water FromPool or HotTub Pump

HeatedWater to Pool

or Hot Tub

Adjust flow from pool

pump.

Hot Supply fromOutdoor Wood Furnace

Return

3-Way Zone Valve

Main

Unit

Bypass

24 VTransformer

Pool Aquastat(with Well)

123

CENTRAL PEX

CENTRAL PEX

PVC or ABSPipe and Accessories

These valves must be closedwhen "shocking" your pool.

110 VPower Source

BW

W R

W

R

R

W W

W


Testimonial-

“It’s efficient, easy to load and clean out. Has the best

warranty coverage of all outdoor furnaces that we

checked. We’re very happy with the furnace, have no

complaints, and love the design. We heat our water as

well as the house, and the house has nice, steady, even

heat.”

Ron, New York


Pool/Hot Tub Application

CIRCU

LA

T

ING TACO

CA

RT

R

IDGE

Hot

WaterHeater

OptionalBypass

Valve

Bypass Line

Plenum

Forced AirFurnace

1" Central PEX

Return

Zoning Pump

Hot Supply from Pumpon Outdoor Wood Furnace


This horizontal assembly must not exceed a height of 4 inches above top of water heater.

NOTE4 x Pipe Dia. Max.(e.g., for 1" pipe,

fittings must not bemore than 4" apart)

NOTEIf heating loops are above manifolds additional controls may be needed toprevent ghost flow.



For illustration purposes only:• Water heater styles may vary.• Size of incoming line may vary (depending on application).• Location of thermostat may vary.

Water to WaterHeat

Exchanger

Testimonial-

“By installing Central Pex radiant floor

heat in the family room we got away from

the hassle of duct work and have a more

constant and comfortable heat source. The

entire home is more comfortable. The kids

love to play on the floor in the family room

and soak up the radiant heat.”

James, North Dakota

Dual Heat SystemIn Floor Radiant / Forced Air

3-WayZone Valve

Return

BaseboardHeater

Bleeder Elbow

Hot Supply from Pumpon Outdoor Wood Furnace

WaterHeater

OptionalBypass Valve

Bypass Line Plenum

Forced AirFurnace

1" Central PEX


For illustration purposes only:• Water heater styles may vary.• Size of incoming line may vary (depending on application).• Location of thermostat may vary.

This horizontal assembly must not exceed a height of 4 inches above top of water heater.




Dual Heat SystemBaseboard / Forced Air

centralboiler.com 15

“Leaders in product quality,design and innovation.”

Qualified Individuals Working Together for a CommonPurpose: A High Quality Finished Product

Using wood as a heating fuel isendorsed by the U.S. ForestryService.

25 Year Limited WarrantyCentral Boiler leads the industry withits commitment to stand behind itsoutdoor wood furnaces. A 25 yearlimited warranty is available on outdoorwood furnaces that are registered at thetime of purchase. 25 year warranty notavailable on Pallet Burner model.

See Warranty Registration form fordetails.

Your Authorized Central Boi ler Dealer

Why You Should Choose The Central Boiler Classic®

Outdoor Wood FurnaceIt’s an alternative that eliminates the problems and increases the advantages of wood heat. It’s a choice that can improve your family’s living environment and standard of living while eliminating the fire hazards and time-consuming chore of tending a traditional wood stove.

The Central Boiler Classic outdoor wood furnacecan heat 100% of your home and hot water. By virtually eliminating your heating costs, the Classic can often pay for itself in the first two yearsof use. Over a ten year period, a homeowner or business may save $10,000 to $50,000 or more inheating costs. And generally the Classic uses 25% to 50% less wood compared to traditional woodfurnaces or other brands of outdoor wood furnaces.

The Classic saves you time and means less workbecause it burns larger pieces of wood. There’s lesssplitting which significantly reduces the time youspend preparing the wood. The large firebox isdesigned for easy loading of wood and removal of ash.

The Classic is beneficial for the environment becauseburning wood is natural. Wood is a totally renewableresource and, when burned, results in no net increasesin carbon dioxide. On the other hand, fossil fuelswhen burned, release carbon dioxide which wouldotherwise be trapped in the earth. The burning offossil fuels causes a net increase in carbon dioxidewhich is believed to be responsible for the heat trapping greenhouse effect.

Authorized Central Boiler Dealerslocated across the U.S. and CanadaWhen you’re looking for a wood heating system for any need, your Central Boiler dealer is there to serve you. Your Central Boiler dealer can answer your questions, provide you with literature aboutthe Classic outdoor wood furnace and help youchoose the model right for your heating needs. To locate a Central Boiler dealer in your area, reference the dealer locator on the internet at centralboiler.com.

F I N A N C I N G TM

Start Saving on YourHeating Bills Today Central Financing is a quick and easyfinancing program that offers competitiverates. By installing a Central BoilerClassic outdoor wood furnace you caneliminate your heating costs and startputting more money into your pockettoday.

For more information, call your localparticipating Central Boiler dealer.

20502 160th Street • Greenbush, MN 567261-800-248-4681 or (218)-782-2575

centralboiler.com© 2005 Central Boiler

® ™ Trademarks of Central Boiler, Inc.

Printed in the United States 12/04

Consider location and direction smoke may travel with prevailing winds before installing your furnace.

Wood smoke can be a nuisance to others.Some applications may not be appropriate.

Content of this brochure is information in possession of Central Boiler at the time of the design of this publication and may not represent what was previously manufactured. Product specifications and appearance subject to change.

p/n 2300

Ask your dealer about Outdoor Furnace Best Burn Practices.

Central Boiler was established in 1984 and is the premier manufacturer of qualityoutdoor wood furnaces in North America. Central Boiler, in Greenbush, Minnesota,is one of the largest manufacturers of outdoor wood furnaces. Based upon a desireto create safer and more efficient heating products, the company’s innovationsand patents have established Central Boiler as a leader in product quality. Theuncompromising attitude to manufacture the best and always strive to make itbetter is at the core of the company’s growth. Central Boiler has a dealer network thathas now established itself throughout the United States and Canada.

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