Green Remodeling and Energy - Portland, Oregon

Portland Office of Sustainable Development

Low-Impact RemodelingLow-Impact RemodelingLow-Impact Remodeling

Building envelopeSolar heating & coolingSpace heatingWater heatingVentilationMoisture controlCombustion safetyPerformance testing

Building envelopeBuilding envelopeSolar heating & coolingSolar heating & coolingSpace heatingSpace heatingWater heatingWater heatingVentilationVentilationMoisture controlMoisture controlCombustion safetyCombustion safetyPerformance testingPerformance testing

Mike O’Brien, OSD Green Building SpecialistMike O’Brien, OSD Green Building Specialist


Building EnvelopeBuilding EnvelopeInsulation is:

Continuous—no thermal breaksFull-R—not compressedHigher R--not code minimum

Air barriers tested to meet air leakagestandardsWindows

Select by: U, SHGC, VT

DoorsInsulated core

Insulation is:Continuous—no thermal breaksFull-R—not compressedHigher R--not code minimum

Air barriers tested to meet air leakagestandardsWindows

Select by: U, SHGC, VT

DoorsInsulated core



Insulation OptionsInsulation Options Fiberglass batts Recycled denim batts Spray-in foam

--Low density--High density

Spray-in cellulose Spray-in fiberglass Integrated systems (SIPs, ICFs)

Fiberglass batts Recycled denim batts Spray-in foam

--Low density--High density

Spray-in cellulose Spray-in fiberglass Integrated systems (SIPs, ICFs)


R-valuesR-values

Attic ceiling

Cathedral ceiling

Walls

Floors

Basement walls

Attic ceiling

Cathedral ceiling

Walls

Floors

Basement walls

1992 OregonEnergy Code1992 OregonEnergy Code

OptimumOptimum

R-38

R-30

R-21

R-30

R-11

R-38

R-30

R-21

R-30

R-11

R-42/49

R-33/38

R-25

R-30

R-19

R-42/49

R-33/38

R-25

R-30

R-19

Envelope assemblyEnvelope assembly


Spray-in foamSpray-in foam

Fiberglass battsFiberglass batts


Which side is insulated with batts? Spray-in foam?Which side is insulated with batts? Spray-in foam?


Foam + battsFoam + batts



Recycled denim fiberRecycled denim fiber

Wet-spray celluloseWet-spray cellulose


Wet-spray celluloseWet-spray cellulose


Spray-in fiberglassSpray-in fiberglass



Integrated Structures SIPs

Rastra Durisol and Faswall

ICFs Other panel systems

Integrated Structures SIPs

Rastra Durisol and Faswall

ICFs Other panel systems

DurisolDurisol

RastraRastra


StructuralInsulated

Panels

StructuralInsulated

Panels


CONTINUITY:

Insulatinghard-to-reach

spots

CONTINUITY:

Insulatinghard-to-reach

spots


WindowsWindowsU-value = 1 / R-valueU-value = 1 / R-value

Oregon EnergyCode:

U = 0.40 or lower(R-2.5)

Oregon EnergyCode:

U = 0.40 or lower(R-2.5)

Optimum:U = 0.33 or lower

(R-3)

Optimum:U = 0.33 or lower

(R-3)


Replacement sashReplacement sash


U-value =Rate of heat transfer

SHGC =Solar Heat Gain

CoefficientReflect incoming

solar heat

VT =Visible

Transmittance

U-value =Rate of heat transfer

SHGC =Solar Heat Gain

CoefficientReflect incoming

solar heat

VT =Visible

Transmittance






Air barriersAir barriers Blower door test

• Envelope tightness• Cost-effective air sealing• Combustion safety

Duct blaster

Carbon monoxide test

Blower door test• Envelope tightness• Cost-effective air sealing• Combustion safety

Duct blaster

Carbon monoxide test


Blower doorBlower door



Smoke pencilSmoke pencil

Finding and sealing air leaksFinding and sealing air leaks


Duct blasterDuct blaster


Continuousair barrier

ADA“AirtightDrywall

Approach”

Continuousair barrier

ADA“AirtightDrywall

Approach”

www.buildingscience.com/resources/walls/Air_Barriers.pdf


Space heating optionsSpace heating options

Replace furnaceLook for AFUE of 90% +Variable-speed blower motorSeal ductworkInsulate ductworkProgrammable thermostat

Replace furnaceLook for AFUE of 90% +Variable-speed blower motorSeal ductworkInsulate ductworkProgrammable thermostat

Forced air systemsForced air systems


High-efficiencysealed-combustionfurnaces

Efficientblower motor

Tight ducts

High-efficiencysealed-combustionfurnaces

Efficientblower motor

Tight ducts


‘Home Comfort Zones’ forced-air zoning system‘Home Comfort Zones’ forced-air zoning system



Space heating optionsSpace heating options

High-efficiency boilerPEX plumbingRadiant heatingRadiatorsFan-forced wall units

High-efficiency boilerPEX plumbingRadiant heatingRadiatorsFan-forced wall units

Hydronic systemsHydronic systems


Green RemodelingGreen RemodelingRadianthydronicheating

Radianthydronicheating

Radiant hydronic heatingRadiant hydronic heating






Water heatersWater heaters

Standard efficiency gas: 55%Good efficiency gas: 60%High efficiency gas: 80% +

Sealed combustion--safe!

Tankless gas: 80% +Electric: 93%Heat pump: 200% +

Standard efficiency gas: 55%Good efficiency gas: 60%High efficiency gas: 80% +

Sealed combustion--safe!

Tankless gas: 80% +Electric: 93%Heat pump: 200% +


TanklessWaterHeaters

TanklessWaterHeaters


Water Heater--120F--Wrap hot andcold lines--Wrap tank--Set tank oninsulation--Showerheads1.5 GPM--Faucetaerators 1.5GPM

Water Heater--120F--Wrap hot andcold lines--Wrap tank--Set tank oninsulation--Showerheads1.5 GPM--Faucetaerators 1.5GPM


Solar water heating and photovoltaic systemsSolar water heating and photovoltaic systems


SolarWaterHeating

SolarWaterHeating


Fresh air ventilationFresh air ventilation

Meets ASHRAE Standard 62.2

Whole house and spot ventilation

Durable equipment

Intelligent controls

Meets ASHRAE Standard 62.2

Whole house and spot ventilation

Durable equipment

Intelligent controls


Quiet < 1 sone

Durable

70 – 100 CFM

Timer control

Quiet < 1 sone

Durable

70 – 100 CFM

Timer control

Exhaust fansExhaust fans


Timer controlsTimer controls


Make-up air for exhaust ventilationMake-up air for exhaust ventilation


Fresh air inlet

Located incloset onoutside wall

Fresh air inlet

Located incloset onoutside wall


Remote exhaust fanRemote exhaust fan



Solar tubesSolar tubes


Before and afterdaylightingBefore and afterdaylighting


Contact G/RatedContact G/Rated

Mike O’Brien503-823-5494mobrien @ ci.portland.or.uswww. portlandonline. com/osdReThink class series March 1Download ‘Green Remodeling Guide’

Mike O’Brien503-823-5494mobrien @ ci.portland.or.uswww. portlandonline. com/osdReThink class series March 1Download ‘Green Remodeling Guide’



Oregon Energy TrustOregon Energy Trust

139,171 Compact fluorescent bulbs20,744 Home improvement projects15,526 Clothes washers4,002 Home energy audits491 ‘Energy Star’ new homes95 Solar water heaters70 Solar electric systems

139,171 Compact fluorescent bulbs20,744 Home improvement projects15,526 Clothes washers4,002 Home energy audits491 ‘Energy Star’ new homes95 Solar water heaters70 Solar electric systems

2005 incentive payments 2005 incentive payments


2005-6 Residential Tax Credits2005-6 Residential Tax CreditsClackamas 1,360Multnomah 2,953Washington 1,783

Clackamas 87Multnomah 73Washington 149

Clackamas 8,855Multnomah 12,291Washington 12,050


Clackamas 87Multnomah 73Washington 149


FurnacesFurnaces

Heat pumpsHeat pumps

AppliancesAppliances

Green Remodeling and Energy - Portland, Oregon

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