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Right – This home uses a light-colored exterior wall to reduce solar heat gain

Right – This home uses a light-colored exterior wall to reduce solar heat gain
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Right – This home uses a white roof and walls to reduce solar heat gain

Right – This home uses a white roof and walls to reduce solar heat gain
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Right – This home uses light tan stucco and white trim to reduce solar heat gain.

Right – This home uses light tan stucco and white trim to reduce solar heat gain.
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Right – This metal roof is being coated with a cool (high SRI) coating to reduce solar heat gain

Right – This metal roof is being coated with a cool (high SRI) coating to reduce solar heat gain
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Right – This prototype home incorporates vertical trellises and retractable exterior blinds to control solar heat gain.

Right – This prototype home incorporates vertical trellises and retractable exterior blinds to control solar heat gain.
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Right: dedicated tank connections for HPWH inlet and outlet provide hydraulic separation

Right: dedicated tank connections for HPWH inlet and outlet provide hydraulic separation
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Right: Maintenance valves are installed at the inlet and outlet of this central heat pump water heater

Right: Maintenance valves are installed at the inlet and outlet of this central heat pump water heater
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Right: These central heat pump water heater storage tanks are plumbed in series

Right: These central heat pump water heater storage tanks are plumbed in series
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Right: This closet door for a heat pump water heater is louvered to allow warm air to enter and exhaust air to leave the closet

Right: This closet door for a heat pump water heater is louvered to allow warm air to enter and exhaust air to leave the closet
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Right: This heat pump water heater is in a basement within the thermal boundary but not actively conditioned. It has over 770 ft² of space with easy access to the control panel and clearance for airflow to the air intake (top) and exhaust (side)

Right: This heat pump water heater is in a basement within the thermal boundary but not actively conditioned. It has over 770 ft² of space with easy access to the control panel and clearance for airflow to the air intake (top) and exhaust (side)
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Right: This heat pump water heater is installed in a garage next to the furnace where there is a lot of space for accessing the unit, and for intake and exhaust; a foam pad insulates the base; the condensate line is correctly drained and pipe insulation

Right: This heat pump water heater is installed in a garage next to the furnace where there is a lot of space for accessing the unit, and for intake and exhaust; a foam pad insulates the base; the condensate line is correctly drained and pipe insulation
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Right: This heat pump water heater is installed in a laundry room with enough space for the control panel and vents to be clear of obstructions; The HPWH can use heat from the dryer to heat water, but the seismic straps should be lower

Right: This heat pump water heater is installed in a laundry room with enough space for the control panel and vents to be clear of obstructions; The HPWH can use heat from the dryer to heat water, but the seismic straps should be lower
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Right: This heat pump water heater is installed in a small space so the, intake air is ducted from an adjacent room; the water heater since on a pad of foam insulation and has a good drain line configuration but the waterpipes lack insulation

Right: This heat pump water heater is installed in a small space so the, intake air is ducted from an adjacent room; the water heater since on a pad of foam insulation and has a good drain line configuration but the waterpipes lack insulation
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Right: This heat pump water heater is installed in a utility closet where it can use heat from the clothes washer and heat pump clothes dryer and has access to a floor drain for condensate

Right: This heat pump water heater is installed in a utility closet where it can use heat from the clothes washer and heat pump clothes dryer and has access to a floor drain for condensate
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Roof penetrations are minimized to provide more space for PV panels.

Roof penetrations are minimized to provide more space for PV panels.
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Roof-mounted solar panels shade the roof below them (left), significantly reducing the roof’s surface temperature (thermal image on the right - yellow region under the panels is cooler than the red and white region on the exposed portion of the roof)

Roof-mounted solar panels shade the roof below them (left), significantly reducing the roof’s surface temperature (thermal image on the right - yellow region under the panels is cooler than the red and white region on the exposed portion of the roof)
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Roofing material and slope

Roofing material and slope
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Roofing membrane is installed over polyisocyanurate rigid foam insulation and insulation cover board that has been cut to fit around locations for blocking for the PV system rack

Roofing membrane is installed over polyisocyanurate rigid foam insulation and insulation cover board that has been cut to fit around locations for blocking for the PV system rack
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Rooftop portion of thermosiphon solar hot water system

Rooftop portion of thermosiphon solar hot water system
Video:

Securing your water heater

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Seven categories of exterior window shading attachments, identified on the DOE Efficient Window Coverings website.

Seven categories of exterior window shading attachments, identified on the DOE Efficient Window Coverings website.
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Shed roofs provide more space for PV panels in this multifamily project near Denver, Colorado.

Shed roofs provide more space for PV panels in this multifamily project near Denver, Colorado.
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Side by side comparisons of standard roofing colors (top row) and cool colors (bottom row) shows that solar reflectance (R) can be reduced significantly using special coatings with almost no change to the color

Side by side comparisons of standard roofing colors (top row) and cool colors (bottom row) shows that solar reflectance (R) can be reduced significantly using special coatings with almost no change to the color
Case Study:

Sitka Apartments Wastewater Heat Pump Measurement and Verification