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NORTH CAROLINA ENERGY STAR SUMMITNORTH CAROLINA ENERGY STAR SUMMITOCTOBER 28, 2008OCTOBER 28, 2008
ENERGY STAR for Homes Version 3ENERGY STAR for Homes Version 3
Oh No, Oh No, ,,Not Another Change!Not Another Change!gg
WHICH BEGS THE QUESTION:WHICH BEGS THE QUESTION:QQWHY CHANGEWHY CHANGE
• Code Changes• Standard Practice Improvementsp• Value Proposition Opportunities
…in other words,…in other words, protect the ‘Brand’!
Goal: AffordableComfortable
< Risk> Customer Satisfaction
Diff ti ti == Better Home==METHOD TO ENERGY STAR MADNESSMETHOD TO ENERGY STAR MADNESS
ControlControlControlHow:
ComfortableHealthyDurable
> Differentiation> Environmental Protection> National Security
== Better HomeLower Cost==
ControlMoisture Flow
ControlThermal Flow
ControlAir Flow
Loads/QA/QC
Driving Forces Fans Conduction Convection Radiation Vapor Bulk
Air Sealing
Tight Ducts
Air Sealing
Tight Ducts
EfficientHVAC
Verification
Air Sealing Air Sealing
Tight DuctsV.1Low-E
Windows
Air Barriers
Low-EWindows
Air/VaporBarriers
Low-EWindows
Air Barriers Air BarriersEfficientWH
Proper Insulation
RadiantBarriers
Barriers
Water Man.Roofs
Right-SizingProperInsulation
PressureBalancing
Min.ThermalBridging
WH
HVACQuality Inst
EfficientLgtg./Appl.V.2
PressureBalancingBarriers Roofs
Ventilation
Balancing Bridging
Dehumid. inHot/Humid
Quality Inst.Hot WaterDistribution
HouseSize
V.3 Water Man.Walls
Water Man.Foundation
Balancing
METHOD TO INDOOR AIR PLUS MADNESSMETHOD TO INDOOR AIR PLUS MADNESS
Why:AffordableComfortHealth
< Risk> Customer Satisfaction ==< Risk of IAQ Problems ==
How:
HealthDurability
> Customer Satisfaction> Differentiation ==
Source FiltrationDilution
Trivial Extra Cost ==
MoistureBulk
MoistureVapor Radon Biological Combustion Chemical
Control FiltrationDilution
Ventilation Filters/Air Cleaning
RadonResist. Con.
Test KitsZones 1 & 2
Air Sealing
Air BarriersMoistureResist. Mat.
Water Man.Construc.
MERV 8Filter
No OzoneGenerators
Whole-HseVentilation
SpotVentilationG
PressedWood
Inter. Paints Finishes
Direct/PowerVent Equip.FPL/Stove
Vented/Stds.
SealFoundation
ScreenOpenings
Tight Ducts
G
CO AlarmsGarage
VentilationCarpets
No SmokingCom. Areas
ProtectMaterials
HVACQuality Inst.P V
What:
GarageIsolation
Dehum. InHot/Humid
Proper Vap.Barriers
MARKET TRANSFORMATION:MARKET TRANSFORMATION:ONE BUNDLE AT A TIMEONE BUNDLE AT A TIME
Safe Size/SpaceSize Penalty
CombustionSafety Techs.
Materials
Super Eff. orSolar WH
pEfficiency
HVAC QualityInstallation
Size Penalty
Tight Ducts
High Eff.HVAC Equip.
Radon Resist.C t ti
Pest Barriers
Super Eff.HVAC E i
Dehumid. InWarm/Humid
High Eff.W t Ht
High Eff.Lgtg./Appl.
Min. ThermalB id i
Water HeatingDistribution
E
Air Sealing
g
VentilationField Verified
Construction
S
Ducts in Condit. Space
HVAC Equip
P
Right-Sizing
Water Htr.
P
VentilationField Verified
Bridging
Verification
Low-EWindows
Water Man.Construction
PressureBalancing
Insulation50%> Code
Super Window
Air Barriers
ProperInsulation
Water Man. Construction
PressureBalancing
Construction
V.1V.1 V.2V.2 V.3V.3 ANHCANHC
50%> CodeConstruction
EFFECTIVE SQUARE FEETEFFECTIVE SQUARE FEETEFFECTIVE SQUARE FEETEFFECTIVE SQUARE FEET
• Open Layouts• Remaining Circulation Generousg• Built-in Furniture• Varying Ceiling Heights• Varying Ceiling Heights• Outdoor/Indoor Linkages• Finish and Trim• Good Designg• Landscape Architecture
Open layoutOpen layoutGenerous CirculationGenerous Circulationp yp y
BuiltBuilt--in Furniturein FurnitureVarying Ceiling HeightVarying Ceiling HeightOutdoor/Indoor LinkagesOutdoor/Indoor LinkagesOutdoor/Indoor LinkagesOutdoor/Indoor Linkages
1,150 sq. ft.1,150 sq. ft.
$20 000$20,000
$40 000$40,000
ENERGY STAR QUALIFIED HOMES VERSION 3:ENERGY STAR QUALIFIED HOMES VERSION 3:
SIZE PENALTYSIZE PENALTY
Current HERS Index ThresholdCurrent HERS Index ThresholdCurrent HERS Index ThresholdCurrent HERS Index ThresholdBOP ThresholdBOP Threshold
BOP Threshold with Size Penalty BOP Threshold with Size Penalty
87888990
ex
84858687
HER
S In
d
80818283H
801,100 2,200 3,300 4,400
House Size [CFA in sq.ft.]
HVAC EQUIPMENT RIGHT SIZINGHVAC EQUIPMENT RIGHT SIZINGHVAC EQUIPMENT RIGHT SIZINGHVAC EQUIPMENT RIGHT SIZING
78
4567
ER
~~30% > eff.30% > eff.
ER
1234
EE
Increase cycle time Increase cycle time from 3 to 8 min.from 3 to 8 min.
EE
01
0 1 2 3 4 5 6 7 8 9 10 11
Run-Time (minutes)Run-Time (minutes)
ENERGY STAR QUALIFIED HOMES VERSION 3:ENERGY STAR QUALIFIED HOMES VERSION 3:
HVAC QUALITY INSTALLATIONHVAC QUALITY INSTALLATION
Right-Sizing Equipment (ACCA Manual J/S)Ducts (ACCA Manual D)
Terminals (ACCA Manual T)
Air Distribution
Terminals (ACCA Manual T)
Duct LeakageStatic Press reStatic Pressure
Flow Across CoilRoom-by-Room Air Flow
Refrigerant Charge TestingTXV Valve
EFFICIENT WATER HEATING SYSTEMEFFICIENT WATER HEATING SYSTEMEFFICIENT WATER HEATING SYSTEMEFFICIENT WATER HEATING SYSTEM
• Energy Factor• Distribution• Distribution• Insulated Piping• Heat Trap Above Tank/Heater
ENERGY STAR QUALIFIED HOMES VERSION 3:ENERGY STAR QUALIFIED HOMES VERSION 3:
WATER HEATING DISTRIBUTIONWATER HEATING DISTRIBUTION
• Core System (Wet Walls)Manifold System• Manifold System
• Demand Pumping System
MANIFOLD HOT WATER DISTRIBUTIONMANIFOLD HOT WATER DISTRIBUTIONMANIFOLD HOT WATER DISTRIBUTIONMANIFOLD HOT WATER DISTRIBUTION
DEMAND PUMPING SYSTEMDEMAND PUMPING SYSTEMDEMAND PUMPING SYSTEMDEMAND PUMPING SYSTEM
EFFECTIVE INSULATION SYSTEMEFFECTIVE INSULATION SYSTEMEFFECTIVE INSULATION SYSTEMEFFECTIVE INSULATION SYSTEM
• Zero-Tolerance (Gaps, Voids, Compression)
• Air Tight Assemblies• Air-Tight Assemblies• Six-Sided Air Barrier (Thermal Bypass Checklist)
• Minimal Thermal Bridging
Where 4 5 must and 9 isWhere 4 is good;
5 must be better;
and 9 is Great!
Courtesy of Building Science Corp.
Effective Insulation ‘System’:Effective Insulation ‘System’:Uninsulated Corners/IntersectionsUninsulated Corners/Intersections
uninsulated corner uninsulated wall intersection
~48 wall corners and intersections~48 wall corners and intersectionsalong with boxed out framingalong with boxed out framingalong with boxed out framingalong with boxed out framing
= ~ 80 feet Uninsulated Wall!
FRAMING PROBLEM EXPOSEDFRAMING PROBLEM EXPOSEDFRAMING PROBLEM EXPOSEDFRAMING PROBLEM EXPOSED
ENERGY STAR QUALIFIED HOMES VERSION 3:ENERGY STAR QUALIFIED HOMES VERSION 3:
MINIMAL THERMAL BRIDGINGMINIMAL THERMAL BRIDGING
Choose One System:• Optimum Value Engineered Framing (OVE)• Insulated Sheathing• Structural Insulated Panels (SIPS)( )• Insulated Concrete Forms (ICF)
Plus:• Raised Heel Trusses• Raised HVAC Attic Platform Framing
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
OVE FRAMINGOVE FRAMING
Courtesy of Building Science Corp.
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
OVE FRAMINGOVE FRAMING
Courtesy of Building Science Corp.Courtesy of Building Science Corp.
Courtesy of Southface InstituteCourtesy of Southface Institute
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
OVE FRAMINGOVE FRAMING
Ladder T Ladder T ––Allows insulation Allows insulation i t i ll i t i ll in exterior wall in exterior wall cavity at wall cavity at wall intersectionsintersectionsintersectionsintersections
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
INSULATED SHEATHINGINSULATED SHEATHING
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
STRUCTURAL INSULATED PANELSSTRUCTURAL INSULATED PANELSSTRUCTURAL INSULATED PANELSSTRUCTURAL INSULATED PANELS
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
INSULATED CONCRETE FORMSINSULATED CONCRETE FORMS
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
RAISED HEEL TRUSSESRAISED HEEL TRUSSES
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
RAISED HEEL TRUSSESRAISED HEEL TRUSSES
MINIMAL THERMAL BRIDGING:MINIMAL THERMAL BRIDGING:
RAISED HVAC PLATFORM FRAMINGRAISED HVAC PLATFORM FRAMING
VENTILATION
WHOLE-HOUSE VENTILATION
FRESH AIR FRESH AIR DUCTED FRESH AIR SUPPLYDUCTED FRESH AIR SUPPLYCONTINUOUS EXHAUSTCONTINUOUS EXHAUST FRESH AIR FRESH AIR DAMPERDAMPER
DUCTED FRESH AIR SUPPLYDUCTED FRESH AIR SUPPLYCONTINUOUS EXHAUSTCONTINUOUS EXHAUST
VENTILATION:
WHOLE-HOUSE VENTILATION
ERVERV
VENTILATION:
SPOT VENTILATION
Maintenance required
Leaves can get sucked into grilles
Ah, another stuck damper,
The saga continues !
Testing findings
Screw pinning damper closed- No airflow
Only testing will find these things
# 2 problem: Very restrictive ductwork
Exit grille is over here !g
Poor ducting installation
Soffitt guy doesn’t do pipe
Any problem with a little extra ?
This is the reading from a 110 cfm fan: OUCH !
Testing tells the story
PRESSURE BALANCING: PROBLEMPRESSURE BALANCING: PROBLEM
PRESSURE BALANCING: SOLUTIONSPRESSURE BALANCING: SOLUTIONS
JUMP DUCTJUMP DUCTTRANSFER GRILLETRANSFER GRILLE
MOISTURE CONTROL:MOISTURE CONTROL:
WATER MANAGED ROOFSWATER MANAGED ROOFS
BITUMINOUS MEMBRANE AT VALLEYSBITUMINOUS MEMBRANE AT VALLEYS
MOISTURE CONTROL:MOISTURE CONTROL:
WATER MANAGED ROOFSWATER MANAGED ROOFS
MORE ROOF FLASHING DETAILSMORE ROOF FLASHING DETAILSMORE ROOF FLASHING DETAILSMORE ROOF FLASHING DETAILS ……
MOISTURE CONTROL :MOISTURE CONTROL :
WATER MANAGED WALLSWATER MANAGED WALLS
DRAINAGE PLANE DESIGNDRAINAGE PLANE DESIGN
MOISTURE CONTROL:MOISTURE CONTROL:
WATER MANAGED WALLSWATER MANAGED WALLS
BEST PRACTICE INSTALLATIONBEST PRACTICE INSTALLATIONBEST PRACTICE INSTALLATIONBEST PRACTICE INSTALLATION
WINDOW/DOOR PAN FLASHINGWINDOW/DOOR PAN FLASHING
MOISTURE CONTROL:MOISTURE CONTROL:
WATER MANAGED WALLSWATER MANAGED WALLS
WINDOW/DOOR PAN FLASHINGWINDOW/DOOR PAN FLASHINGWINDOW/DOOR PAN FLASHINGWINDOW/DOOR PAN FLASHING
MOISTURE CONTROL:MOISTURE CONTROL:
WATER MANAGED FOUNDATIONSWATER MANAGED FOUNDATIONSWATER MANAGED FOUNDATIONSWATER MANAGED FOUNDATIONS
FOUNDATION DRAINAGE SYSTEMFOUNDATION DRAINAGE SYSTEMFOUNDATION DRAINAGE SYSTEM FOUNDATION DRAINAGE SYSTEM WITH CAPILLARY BREAKSWITH CAPILLARY BREAKS
FreeFree--draining backdraining back--fillfillPerforated drainage pipe in gravel Perforated drainage pipe in gravel with fabric filterwith fabric filter
FreeFree--draining backdraining back--fillfill
Poly vapor retarder/capillary breakPoly vapor retarder/capillary break
Course gravel granular drainageCourse gravel granular drainage
Pipe connection to granular drainagePipe connection to granular drainage
MOISTURE/RADON CONTROL:MOISTURE/RADON CONTROL:
WATER MANAGED FOUNDATIONSWATER MANAGED FOUNDATIONS
UNVENTED CRAWLSPACEUNVENTED CRAWLSPACEUNVENTED CRAWLSPACEUNVENTED CRAWLSPACE
POLY UNDER SLABPOLY UNDER SLABVAPOR AND RADON BARRIERVAPOR AND RADON BARRIER
PATH TO NO/LOW CARBONPATH TO NO/LOW CARBONPATH TO NO/LOW CARBONPATH TO NO/LOW CARBON
RenewableENERGY
STAR ENERGY
STAR ENERGY
STAR Power
(Purchase orOn-site)
OccupantBehavior
Advanced Design
Advanced Technologies
for HomesV.3
~2010Specs
for HomesV.2
2006Specs
for HomesV.1
1995 Specs
Advanced New Home Construction
ADVANCED NEW HOME CONSTRUCTIONADVANCED NEW HOME CONSTRUCTIONADVANCED NEW HOME CONSTRUCTIONADVANCED NEW HOME CONSTRUCTION
• Builds upon existing ENERGY STAR id liprogram guidelines
• Acts as “farm system”• Expedites a very specific bundle of
technologies that don’t yet meet g yENERGY STAR criteria
ANHC BOP: THERMAL ENVELOPEANHC BOP: THERMAL ENVELOPEANHC BOP: THERMAL ENVELOPEANHC BOP: THERMAL ENVELOPE
Thermal Insulation:Thermal Envelope
Insulation:• Prescriptive R-value requirements >
(or overall UA <) 50% IECC 2006Th l b k ll (f i f t 12%)• Thermal break wall (framing factor < 12%)
• RESNET Level 1 Insulation (gaps, voids, compression <2%)
• Complete air barrier assembly (ENERGY STAR TBC)p y ( )
Windows:• Climate Zones 1 - 3: SHGC < .2• Climate Zones 3 - 5: SHGC < 27;• Climate Zones 3 - 5: SHGC < .27;
U-Value < .3• Climate > Zones 6 : U-Value < .2
~$9,000 - $14,000 Incremental Cost
ANHC BOP: HVAC PROPER INSTALLANHC BOP: HVAC PROPER INSTALLANHC BOP: HVAC PROPER INSTALLANHC BOP: HVAC PROPER INSTALL
HVAC Proper Ducts (alternate is ductless HVAC system):HVAC Proper Installation
Ducts (alternate is ductless HVAC system):•Ducts inside conditioned space•ACCA Manual D and T duct and terminal sizing or equiv.•Compact duct layouto pa du ayou•Total duct leakage < 3% of fan flow•Verified room-by-room air flow •Verified air flow across coil/heat exchanger per man. specPressure balancing in bedrooms (transfer grills cross over•Pressure balancing in bedrooms (transfer grills, cross-over
ducts, or dedicated returns)Ventilation:•Verify whole-house ventilation air flow meets ASHRAE min.y•Verify spot ventilation air flow meets ASHRAE minimumEquipment:•ACCA Manual J and S equipment sizing or equivalent•Ensure proper refrigerant charge
~$200 - $1,000 Incremental Cost•Ensure proper refrigerant charge
ANHC BOP: HVAC EQUIPMENTANHC BOP: HVAC EQUIPMENTANHC BOP: HVAC EQUIPMENTANHC BOP: HVAC EQUIPMENT
HVAC Climate Cold (CZ > Warm (CZ 3- Hot (CZ 1-HVAC Equipment
Climate Cold (CZ >6)
Warm (CZ 35)
Hot (CZ 12)
AFUE > 94% > 90% > 80%
SEER > 13 > 15 > 18HSPF > 10 > 9 > 8.2COP (GHP) > 5 > 5 > 5Ventilation HRV Supply-only ERV or
supply-onlypp y y
Multiple or variable speed equipment all climates with high-efficiency fan and air-tight cabinet
Dehumidification with either low SHR (< .7) or stand-alone
~$2,500 - $7,500 Incremental Cost
Dehumidification with either low SHR (< .7) or stand alone dehumidifier for Hot/Humid Climate (IECC 2006 Map):
ANHC BOP: WATER HEATING SYSTEMANHC BOP: WATER HEATING SYSTEMANHC BOP: WATER HEATING SYSTEMANHC BOP: WATER HEATING SYSTEM
Water Heating System
Efficient Equipment;•heat pump electric > 2.0 COP, or •direct-vent gas > .8 EF, or•direct vent gas > .8 EF, or •Solar hot water system or•desuperheater in Climate Zones 1-3Efficient Distribution:•Insulate hot water piping minimum R-4•Low-flow faucets and showerheads•Efficient demand pumping manifold or core layout•Efficient demand pumping, manifold, or core layout
~$1,000 - $6,000 Incremental Cost
ANHC BOP: LIGHTING/APPLIANCESANHC BOP: LIGHTING/APPLIANCESANHC BOP: LIGHTING/APPLIANCESANHC BOP: LIGHTING/APPLIANCES
Lighting 100% ENERGY STAR Qualified Fixtures
Appliances ENERGY STAR Qualified Refrigerator, Dishwasher, Clothes Washer
• ~$1,000 - $2,000 Incremental Cost
ANHC BOP: WATER MANAGED CONSTANHC BOP: WATER MANAGED CONSTANHC BOP: WATER MANAGED CONST.ANHC BOP: WATER MANAGED CONST.
Moisture Control
Water-managed roof, walls, foundation (see EPA IAP specifications)
~$0 Incremental Cost
NICHE OR MAINSTREAM PRODUCT?NICHE OR MAINSTREAM PRODUCT?NICHE OR MAINSTREAM PRODUCT?NICHE OR MAINSTREAM PRODUCT?
ENERGY STAR vs ANHCENERGY STAR vs ANHC
ENERGY STAR ENERGY STAR Advanced New Home Advanced New Home
ENERGY STAR vs. ANHCENERGY STAR vs. ANHC
ENERGY STAR ENERGY STAR Qualified HomeQualified Home
Advanced New Home Advanced New Home ConstructionConstruction
Mainstream BuildersMainstream Builders Innovative BuildersInnovative Builders
Cost Effective Cost Effective CostCost Effective Effective Cost Effective Cost Effective TodayToday
CostCost--Effective Effective FutureFuture
Market Ready Market Ready Near Market Ready Near Market Ready Market Ready Market Ready InfrastructureInfrastructure
Near Market Ready Near Market Ready InfrastructureInfrastructure
Maximum Maximum Restricted Restricted Maximum Maximum ParticipationParticipation
Restricted Restricted ParticipationParticipation
THE ELEPHANT IN THE ROOMTHE ELEPHANT IN THE ROOMTHE ELEPHANT IN THE ROOMTHE ELEPHANT IN THE ROOM
Min SpecsMin Specs Builders ChallengeBuilders Challenge ANHCANHCMin. SpecsMin. Specs Builders ChallengeBuilders Challenge ANHCANHCMax SizeMax Size NoneNone SpecifiedSpecified
InsulationInsulation HERS 70HERS 70 50% > Code50% > CodeInsulationInsulation HERS 70HERS 70 50% Code50% Code
WindowsWindows ENERGY STARENERGY STAR Super WindowsSuper Windows
Duct EfficiencyDuct Efficiency 5% outdoors/10% total5% outdoors/10% total In Cond. Space/5% tot.In Cond. Space/5% tot.Duct EfficiencyDuct Efficiency 5% outdoors/10% total5% outdoors/10% total In Cond. Space/5% tot.In Cond. Space/5% tot.
HVAC InstallationHVAC Installation RightRight--SizingSizing ACCA QI StandardACCA QI Standard
VentilationVentilation WholeWhole--house/Spothouse/Spot ASHRAE 62.2 VerifiedASHRAE 62.2 VerifiedV nt at onV nt at on WhoWho hous /Spothous /Spot SH E 6 . V r fSH E 6 . V r f
Water Heating Sys. Water Heating Sys. HERS 70 (Equip. only)HERS 70 (Equip. only) Super Eff Htr + DistribSuper Eff Htr + Distrib
Lighting/AppliancesLighting/Appliances HERS 70HERS 70 100% ENERGY STAR100% ENERGY STARg g ppg g pp
Moisture ControlMoisture Control Water Man. Construc.Water Man. Construc. Water Man. Construc.Water Man. Construc.
TIMELINETIMELINETIMELINETIMELINE
2008 2009 2010 20112008 2009 2010 2011
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
V 3 Init Vet:V.3 Init. Vet:Draft V.3 SpecV.3 Init. VettingRevise V.3 Spec V.3 2nd Vet:
Broad VettingRevise V 3 SpecRevise V.3 SpecAddit. Vetting
if reqd.
ANHC Design:Draft ANHC Spec
V.3 Implementation:Launch 1/1/10 with 12 month grace periodEnforce V.3 in states w/rigorous codesPromote V.3 where ES is local codeEnforce V 3 everywhere 1/1/11p
Vet ANHC Spec
ANHC Implementation:Launch ANHCBuilder SelectionDevelop marketing messages and tools
Enforce V.3 everywhere 1/1/11
Develop marketing messages and tools Ongoing Construct, label, promote, eval. HomesFine tune spec and messaging
HOW TO GET MORE INFORMATIONHOW TO GET MORE INFORMATIONHOW TO GET MORE INFORMATIONHOW TO GET MORE INFORMATION
On the Web at:Whttp://www.energystar.gov/homeshttp://www.energystar.gov/homes