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Right – This home’s HVAC system consists of a ground source heat pump that provides heating and cooling with a rated efficiency of 5.0 COP.

Right – This home’s HVAC system consists of a ground source heat pump that provides heating and cooling with a rated efficiency of 5.0 COP.
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Right – This HRV is ducted separately from the home’s ductless heat pumps to provide filtered fresh air to sleeping and living areas and to exhaust stale air from the bathrooms and laundry.

Right – This HRV is ducted separately from the home’s ductless heat pumps to provide filtered fresh air to sleeping and living areas and to exhaust stale air from the bathrooms and laundry.
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Right – This HVAC condensing unit is elevated on a raised-slab

Right – This HVAC condensing unit is elevated on a raised-slab
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Right – This plug-in sensor detects indoor air quality issues in a home, including elevated levels of humidity, VOCs, smoke, carbon dioxide, or small particulates; if detected, the sensor can switch on the nearest exhaust fan to remove the pollutants.

Right – This plug-in sensor detects indoor air quality issues in a home, including elevated levels of humidity, VOCs, smoke, carbon dioxide, or small particulates; if detected, the sensor can switch on the nearest exhaust fan to remove the pollutants.
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Right (decent): For a relatively high-capacity ccASHP sized per Approach 3 or 4 to meet nearly 100% of the heating load, this heat pump’s modulating zone has a decent overlap with the home’s heating load line, reducing short-cycling.

Right (decent): For a relatively high-capacity ccASHP sized per Approach 3 or 4 to meet nearly 100% of the heating load, this heat pump’s modulating zone has a decent overlap with the home’s heating load line, reducing short-cycling.
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Right- An electronic controller operates an exhaust fan, a mechanical damper on a fresh air intake, and the central heat pump’s fan, which draws in fresh air through the damper and distributes it in sync with exhaust fan operation for balanced fresh air.

Right- An electronic controller operates an exhaust fan, a mechanical damper on a fresh air intake, and the central heat pump’s fan, which draws in fresh air through the damper and distributes it in sync with exhaust fan operation for balanced fresh air.
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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: Sized per Approach 1, this heat pump will have minimal short-cycling; since sized using Approach 1, it will require backup heat when temp is below 30°F but could still contribute significant heating down to heating design temp (-6°F) and lower

Right: Sized per Approach 1, this heat pump will have minimal short-cycling; since sized using Approach 1, it will require backup heat when temp is below 30°F but could still contribute significant heating down to heating design temp (-6°F) and lower
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Right: Sized per Approach 3 or 4, this heat pump’s modulating zone has a large overlap with the home’s heating load line, resulting in minimal short-cycling; the unit may require a small amount of backup heat during the very coldest hours of winter.

Right: Sized per Approach 3 or 4, this heat pump’s modulating zone has a large overlap with the home’s heating load line, resulting in minimal short-cycling; the unit may require a small amount of backup heat during the very coldest hours of winter.
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Right: Sized per Approach 3, this heat pump’s modulating zone has a large overlap with the home’s heating load line; it will require backup heating but could still contribute significant heating for all hours of the heating season

Right: Sized per Approach 3, this heat pump’s modulating zone has a large overlap with the home’s heating load line; it will require backup heating but could still contribute significant heating for all hours of the heating season
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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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Riprap is placed on a hillside to stabilize the ground and reduce erosion

Riprap is placed on a hillside to stabilize the ground and reduce erosion
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Roof supports for the awning that will cover the heat pump compressor are anchored through the siding into studs with long screws.

Roof supports for the awning that will cover the heat pump compressor are anchored through the siding into studs with long screws.
Case Study:

Show Home Targets Energy Efficiency in Hot-Humid Climates

Case Study:

Sitka Apartments Wastewater Heat Pump Measurement and Verification

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Size comparison between two 50-gallon water heaters: a traditional electric-resistance-only water heater on the left and a heat pump water heater on the right

Size comparison between two 50-gallon water heaters: a traditional electric-resistance-only water heater on the left and a heat pump water heater on the right
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Split-system air source heat pump

Split-system air source heat pump