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This damper located at the top of a stairwell in a multistory building is automatically kept closed to reduce energy loss; it automatically opens during a smoke event.

This damper located at the top of a stairwell in a multistory building is automatically kept closed to reduce energy loss; it automatically opens during a smoke event.
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This energy recovery ventilator (ERV) provides balanced ventilation to a dwelling unit in a multifamily building

This energy recovery ventilator (ERV) provides balanced ventilation to a dwelling unit in a multifamily building
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This EV charger is located near the home’s electrical panel and a time-of-use (TOU) meter.

This EV charger is located near the home’s electrical panel and a time-of-use (TOU) meter.
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This EV charger was properly installed with clear floor and wall access for charging.

This EV charger was properly installed with clear floor and wall access for charging.
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This experimental earth tube is 220 ft long, 8 inches in diameter, and is buried 10 feet deep

This experimental earth tube is 220 ft long, 8 inches in diameter, and is buried 10 feet deep
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This experimental radiative/evaporative hybrid cooling system uses water to reject heat at night through radiation and evaporation

This experimental radiative/evaporative hybrid cooling system uses water to reject heat at night through radiation and evaporation
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This fully packaged/skid-mounted central heat pump water heating system was shipped to the building on a truck and craned into location

This fully packaged/skid-mounted central heat pump water heating system was shipped to the building on a truck and craned into location
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This fully specified central heat pump water heating system has four individual outdoor heat pump units plumbed in parallel to indoor storage tanks

This fully specified central heat pump water heating system has four individual outdoor heat pump units plumbed in parallel to indoor storage tanks
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This home’s balanced fresh air system includes a filtered fresh air intake that is wired to the central HVAC system with timer controls while exhaust fans in the kitchen, bathrooms, and laundry room pull stale and moist air from the home.

This home’s balanced fresh air system includes a filtered fresh air intake that is wired to the central HVAC system with timer controls while exhaust fans in the kitchen, bathrooms, and laundry room pull stale and moist air from the home.
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This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home

This HRV, installed in a conditioned attic, provides balanced ventilation to the whole home
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This HVAC air filter slot contains a 1-inch-thick filter but the slot is designed to accept either a 1-inch or a 4-inch air filter.

This HVAC air filter slot contains a 1-inch-thick filter but the slot is designed to accept either a 1-inch or a 4-inch air filter.
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This HVAC air filter slot is covered with a door that is held in place with spring clips and tabs.

This HVAC air filter slot is covered with a door that is held in place with spring clips and tabs.
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This mechanical room contains both the storage tanks (right) and heat pumps (left) of a central heat pump water heating system

This mechanical room contains both the storage tanks (right) and heat pumps (left) of a central heat pump water heating system
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This multistory stairwell has an automatic damper that is integrated with the engineered smoke control system.

This multistory stairwell has an automatic damper that is integrated with the engineered smoke control system.
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This new filter is inserted into furnace filter slot on the return side of the furnace with the arrow on the side of the filter frame pointing in the direction of airflow, which is toward the furnace.

This new filter is inserted into furnace filter slot on the return side of the furnace with the arrow on the side of the filter frame pointing in the direction of airflow, which is toward the furnace.
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This night ventilation cooling system is timer-controlled and ducted to the home's HVAC ducts to bring in filtered fresh air at night.

This night ventilation cooling system is timer-controlled and ducted to the home's HVAC ducts to bring in filtered fresh air at night.
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This outdoor air intake grille provides a safe and accessible location for measuring whole-house ventilation air flow

This outdoor air intake grille provides a safe and accessible location for measuring whole-house ventilation air flow
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This packaged central heat pump water heating system has the heat pumps on the exterior of the blue enclosure, and the storage tanks, temperature maintenance equipment, mixing valve, and control modules on the inside

This packaged central heat pump water heating system has the heat pumps on the exterior of the blue enclosure, and the storage tanks, temperature maintenance equipment, mixing valve, and control modules on the inside
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This range hood has been vented through the cabinet then through the wall to the outside.

This range hood has been vented through the cabinet then through the wall to the outside.
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This retrofit central heat pump water heater system utilizes the existing water heater as a swing tank to provide temperature maintenance for the hot water circulation loop

This retrofit central heat pump water heater system utilizes the existing water heater as a swing tank to provide temperature maintenance for the hot water circulation loop
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This return grille is located in a central hallway in the home and stale air is pulled through this grille and the air filter located behind it to return to the HVAC system for heating or cooling.

This return grille is located in a central hallway in the home and stale air is pulled through this grille and the air filter located behind it to return to the HVAC system for heating or cooling.
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This room has several passive and low-energy cooling features including a ceiling fan, fully operable French doors, window shading, an outdoor water feature, and light-colored hard-scaping.

This room has several passive and low-energy cooling features including a ceiling fan, fully operable French doors, window shading, an outdoor water feature, and light-colored hard-scaping.
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This solar powered attic fan runs when the sun is shining and does not draw any power from the home’s electrical system

This solar powered attic fan runs when the sun is shining and does not draw any power from the home’s electrical system
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This traditional whole-house fan uses uninsulated gravity dampers.

This traditional whole-house fan uses uninsulated gravity dampers.