Cem 350 hud residential energy conservation 9 2016

Steven Winter Associates, Inc.

HUD Energy Action Plan

Building Energy Efficient Building Energy Efficient Homes:Homes:

New Construction and RehabNew Construction and RehabHERS 86 (EnergyStar) minimumHERS 86 (EnergyStar) minimum

30% Better Than the M.E.C.30% Better Than the M.E.C.

Other Considerations:Other Considerations:Affordable; Durable; HealthyAffordable; Durable; Healthy

William Zoeller, R.A.



Major Systems Affecting Building Major Systems Affecting Building Energy PerformanceEnergy Performance

Building EnvelopeBuilding Envelope Air-tightness, Insulation levelsAir-tightness, Insulation levels Water-managementWater-management

Windows and Glazing SystemsWindows and Glazing Systems Glazing SHGCGlazing SHGC Overall “U” ValueOverall “U” Value

Heating, Ventilation, and Air ConditioningHeating, Ventilation, and Air Conditioning Equipment sizing, efficiency and locationEquipment sizing, efficiency and location Duct tightness, distribution effectiveness, Duct tightness, distribution effectiveness,

and location and location



Major Systems Affecting Building Major Systems Affecting Building Energy PerformanceEnergy Performance

Domestic Hot WaterDomestic Hot Water GenerationGeneration DistributionDistribution Stand-by-lossesStand-by-losses

AppliancesAppliances Refrigerator, dishwasher, clothes Refrigerator, dishwasher, clothes

washer/dryerwasher/dryer Lighting and miscellaneousLighting and miscellaneous



Panelized Advanced FramingPanelized Advanced Framing Panelized Advanced Panelized Advanced

Framing 2 x 6 Walls @24” Framing 2 x 6 Walls @24” OCOC

Low-e WindowsLow-e Windows Foamed Stud Cavities with Foamed Stud Cavities with

Blown in Cellulose (R-23)Blown in Cellulose (R-23) Inside-The Envelope AHUInside-The Envelope AHU Foamed and Insulation Foamed and Insulation

Buried DuctsBuried Ducts Affordable and Starter Affordable and Starter

HomesHomes HERS 89HERS 89

Outlook ConstructionOutlook ConstructionAtlanta, GAAtlanta, GA



Panelized Advanced FramingPanelized Advanced Framing Reduces Framing Cost and increases Reduces Framing Cost and increases

Level of insulationLevel of insulation Reduces on-Site Labor and Reduces on-Site Labor and

Construction TimeConstruction Time Requires Additional Planning, But Requires Additional Planning, But

Improves Systems IntegrationImproves Systems Integration



Insulation-Buried DuctsInsulation-Buried Ducts

Computer Modeling of Heat Flow From Insulation Buried Duct

Section Through Foamed Over Insulation Buried Duct

All ducts fully All ducts fully buried with buried with

several inches of several inches of insulationinsulation

Larger trunks Larger trunks barely buried and barely buried and smaller branches smaller branches

fully buriedfully buried

Larger trunks Larger trunks partially buriedpartially buried

R-30R-30 R-15R-15 R-10R-10



Buried Duct BenefitsBuried Duct Benefits Improves air distribution Improves air distribution

efficiency efficiency Provides additional air-Provides additional air-

sealing at joints and sealing at joints and registersregisters

Reduces Peak load Reduces Peak load allowing a smaller allowing a smaller system to be usedsystem to be used

Cost of foam can be Cost of foam can be offset by reduced cost offset by reduced cost of HVACof HVAC



PANELIZED WALL AND PANELIZED WALL AND ROOF SYSTEMSROOF SYSTEMS

25 Home In-fill Development25 Home In-fill Development Panelized SIP ConstructionPanelized SIP Construction

R-24 WallsR-24 Walls R-40 RoofsR-40 Roofs

92 AFUE Furnaces92 AFUE Furnaces Mastic Sealed DuctsMastic Sealed Ducts 1.2-kW PV Solar Systems1.2-kW PV Solar Systems Low-e WindowsLow-e Windows EnergyStar AppliancesEnergyStar Appliances Compact Fluorescent Compact Fluorescent

LightingLighting Controlled VentilationControlled VentilationClaretian AssociatesClaretian Associates

South Chicago, IlSouth Chicago, Il



First SIP Project in ChicagoFirst SIP Project in Chicago $155,000 cost for 1700 SF $155,000 cost for 1700 SF

HomeHome 5% Increase in Cost of 5% Increase in Cost of

Standard ConstructionStandard Construction 50% Increase in Energy 50% Increase in Energy

EfficiencyEfficiency


HUD Energy Action PlanPanelized Wall and Roof Panelized Wall and Roof SystemsSystems

Cement Board Structural-Insulated-Panels Aluminum-Skinned SIP Roof Construction Structural-Steel Moment-Frame at Centerline Sold as Pre-Engineered Kit to Builder Standard and Custom Designs Available Low-Cost and Durable

Homefront Homes



Cement Board SIP PanelsCement Board SIP Panels• Hardie® 5/16” thick cement board laminated to both sides

of 4” thick polystyrene foam • Cuts construction time by up to 75%• High minimum R values with R-20 walls and R-30 roof• No wood used in the home construction to avoid moisture

and termite damage

Panelized Wall Construction System:

3 days to complete the building shell



Home FrontHome Front

Home Front homes proved exceptionally resilient when Hurricane Charley struck in

August, 2004

Before Hurricane

One mile away….

After Hurricane



Unvented CrawlspaceUnvented Crawlspace

Improved Energy EfficiencyImproved Energy Efficiency Improved Indoor-Air-QualityImproved Indoor-Air-Quality



Low-e Glass Low-e Glass WindowsWindows

Low-e glass blocks out Low-e glass blocks out most long-wave radiation most long-wave radiation (heat) while allowing (heat) while allowing most of the short-wave most of the short-wave radiation (light) to enter.radiation (light) to enter.



Typical CostsTypical Costs Extra cost for 300 SF low-e Extra cost for 300 SF low-e

coating on double glazing: $300.coating on double glazing: $300. Savings in downsizing AC by ½ Savings in downsizing AC by ½

ton: $275.ton: $275.

Net cost: $25.Net cost: $25.



Additional Benefits of Low-e Additional Benefits of Low-e WindowsWindows

Reduced cooling load needs smaller HVAC Reduced cooling load needs smaller HVAC systemsystem

Smaller HVAC system means lower air-flows, Smaller HVAC system means lower air-flows, and simpler pressure balancingand simpler pressure balancing

By being more closely matched to both peak By being more closely matched to both peak and non-peak cooling loads better and non-peak cooling loads better dehumidification is achieveddehumidification is achieved (Improves IAQ and inhibits mold growth)(Improves IAQ and inhibits mold growth)



HVAC OptimizationHVAC Optimization

““Right-Sized” HVAC Right-Sized” HVAC Manual J with no oversizeManual J with no oversize

Compact designCompact design avoids ducts in outside wallsavoids ducts in outside walls Less opportunity for leaks and lossesLess opportunity for leaks and losses Less costly to installLess costly to install Better able to achieve air-flowsBetter able to achieve air-flows



OPTIMIZED HVAC

Mercedes Homes Townhouses

Melbourne, Florida

Concrete and Panelized Concrete and Panelized ConstructionConstruction

Low-e windowsLow-e windows Integrated HVACIntegrated HVAC AHU in Conditioned-spaceAHU in Conditioned-space EnergyStar QualifiedEnergyStar Qualified



Down-Sized HVACDown-Sized HVAC

Single Zone 1.5 Ton Capacity HeatpumpsCompact DistributionFirst and Second Floor ReturnsFresh-Air Duct



OPTIMIZED HVAC COMFORT TESTING


HUD Energy Action PlanTankless Gas Water-Tankless Gas Water-HeaterHeater

ECO-Block WallsECO-Block Walls Fly-Ash ConcreteFly-Ash Concrete Low-e WindowsLow-e Windows Integrated Compact HVACIntegrated Compact HVAC SEER 17 A/CSEER 17 A/C Tankless Water-Heater Tankless Water-Heater

and Hydro-coil AHUand Hydro-coil AHU HERS 95HERS 95

Madera I Model Home, Gainesville, Florida

Takagi T-KD20



Cost and BenefitsCost and Benefits Saves Space: Much smaller than a storage tankSaves Space: Much smaller than a storage tank Saves Energy: Stand-by losses are eliminated. Saves Energy: Stand-by losses are eliminated.

Operating efficiency improves by 30% to 40%Operating efficiency improves by 30% to 40% Saves Energy: For space heating, .84 AFUE is Saves Energy: For space heating, .84 AFUE is

higher than standard furnace at .80 AFUEhigher than standard furnace at .80 AFUE Incremental cost increase is about $600. Very Incremental cost increase is about $600. Very

short initial pay-back, and immediate positive short initial pay-back, and immediate positive cash flow.cash flow.



Heat Pump Water HeaterHeat Pump Water Heater

Installed in a home in Installed in a home in Melbourne, FloridaMelbourne, Florida

WatterSaver Integrated HPWH WatterSaver Integrated HPWH by ECR International, Inc. by ECR International, Inc. (product introduced Fall 2002)(product introduced Fall 2002)

Monitoring began in April 2002 Monitoring began in April 2002 3-person household (2 adults 3-person household (2 adults

& toddler)& toddler)



Preliminary FindingsPreliminary Findings

Reliable Reliable PerformancePerformance

Homeowners very Homeowners very pleasedpleased

62% kWh savings62% kWh savings $10/month savings $10/month savings

at local electric at local electric rates of $.077/kWhrates of $.077/kWh



Energy-Efficient Lighting, Appliances, and ControlsEnergy-Efficient Lighting, Appliances, and Controls

Takoma Village, Washington, DC



Takoma VillageTakoma VillageWashington, D.CWashington, D.C..

Other Sustainable FeaturesOther Sustainable Features Energy Efficient LightingEnergy Efficient Lighting Low-VOC Paints and FinishesLow-VOC Paints and Finishes Fiber-Cement SidingFiber-Cement Siding Recycled-Content CarpetsRecycled-Content Carpets Horizontal-Axis Clothes WasherHorizontal-Axis Clothes Washer Tubular SkylightsTubular Skylights



Putting It All TogetherPutting It All Together

Warwick Grove,Warwick Grove,Warwick, NYWarwick, NY



Putting It All TogetherPutting It All Together Advanced FramingAdvanced Framing Unvented CrawlspaceUnvented Crawlspace Low-E WindowsLow-E Windows Optimized HVACOptimized HVAC

92% Condensing Furnace92% Condensing Furnace 13 SEER Air-Conditioning13 SEER Air-Conditioning

Tankless Gas Water-HeaterTankless Gas Water-Heater EnergyStar AppliancesEnergyStar Appliances HERS 89 -90!HERS 89 -90!

Engineering

Cem 350 hud residential energy conservation 9 2016