Green Remodeling and Energy - Portland, Oregon
Transcript of 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
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
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)
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
Spray-in foamSpray-in foam
Fiberglass battsFiberglass batts
Portland Office of Sustainable Development
Which side is insulated with batts? Spray-in foam?Which side is insulated with batts? Spray-in foam?
Portland Office of Sustainable Development
Recycled denim fiberRecycled denim fiber
Wet-spray celluloseWet-spray cellulose
Portland Office of Sustainable Development
Integrated Structures SIPs
Rastra Durisol and Faswall
ICFs Other panel systems
Integrated Structures SIPs
Rastra Durisol and Faswall
ICFs Other panel systems
DurisolDurisol
RastraRastra
Portland Office of Sustainable Development
CONTINUITY:
Insulatinghard-to-reach
spots
CONTINUITY:
Insulatinghard-to-reach
spots
Portland Office of Sustainable Development
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)
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
Smoke pencilSmoke pencil
Finding and sealing air leaksFinding and sealing air leaks
Portland Office of Sustainable Development
Continuousair barrier
ADA“AirtightDrywall
Approach”
Continuousair barrier
ADA“AirtightDrywall
Approach”
www.buildingscience.com/resources/walls/Air_Barriers.pdf
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
High-efficiencysealed-combustionfurnaces
Efficientblower motor
Tight ducts
High-efficiencysealed-combustionfurnaces
Efficientblower motor
Tight ducts
Portland Office of Sustainable Development
‘Home Comfort Zones’ forced-air zoning system‘Home Comfort Zones’ forced-air zoning system
Portland Office of Sustainable Development
Space heating optionsSpace heating options
High-efficiency boilerPEX plumbingRadiant heatingRadiatorsFan-forced wall units
High-efficiency boilerPEX plumbingRadiant heatingRadiatorsFan-forced wall units
Hydronic systemsHydronic systems
Portland Office of Sustainable Development
Green RemodelingGreen RemodelingRadianthydronicheating
Radianthydronicheating
Radiant hydronic heatingRadiant hydronic heating
Portland Office of Sustainable Development
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% +
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
Solar water heating and photovoltaic systemsSolar water heating and photovoltaic systems
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
Quiet < 1 sone
Durable
70 – 100 CFM
Timer control
Quiet < 1 sone
Durable
70 – 100 CFM
Timer control
Exhaust fansExhaust fans
Portland Office of Sustainable Development
Make-up air for exhaust ventilationMake-up air for exhaust ventilation
Portland Office of Sustainable Development
Fresh air inlet
Located incloset onoutside wall
Fresh air inlet
Located incloset onoutside wall
Portland Office of Sustainable Development
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’
Portland Office of Sustainable Development
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
Portland Office of Sustainable Development
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 1,360Multnomah 2,953Washington 1,783
Clackamas 87Multnomah 73Washington 149
Clackamas 8,855Multnomah 12,291Washington 12,050
FurnacesFurnaces
Heat pumpsHeat pumps
AppliancesAppliances