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The very high efficiency (4.7 COP) ground-source heat pump provides hot water to a tank for radiant floor heat and domestic hot water.

The very high efficiency (4.7 COP) ground-source heat pump provides hot water to a tank for radiant floor heat and domestic hot water.
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There is a filter installed to filter outdoor air

There is a filter installed to filter outdoor air
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There is no filter installed in the HVAC system

There is no filter installed in the HVAC system
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There is no filter installed to filter the outdoor air

There is no filter installed to filter the outdoor air
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Thermal mass causes a time lag in the transfer of heat as well as a dampening of peak temperatures, as shown by this plot

Thermal mass causes a time lag in the transfer of heat as well as a dampening of peak temperatures, as shown by this plot
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Thermal mass stained concrete slab absorb solar heat during the day and release it into the rooms at night.

Thermal mass stained concrete slab absorb solar heat during the day and release it into the rooms at night.
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Thermometer used to measure dry-bulb temperature

Thermometer used to measure dry-bulb temperature
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Thermostatic radiator valve operation

Thermostatic radiator valve operation
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Thermostatic radiator valve schematic

Thermostatic radiator valve schematic
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These ducts were installed within the home's conditioned space in a central chaise down the main hallway.

These ducts were installed within the home's conditioned space in a central chaise down the main hallway.
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These plots compare sizing approaches in terms of the approximate annual heating load a heat pump might carry throughout the year for a hypothetical home in Minneapolis, MN.

These plots compare sizing approaches in terms of the approximate annual heating load a heat pump might carry throughout the year for a hypothetical home in Minneapolis, MN.
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These two schematics show the plan-view of the same duct system; the upper schematic shows all supply and return outlets and inlets uncovered for normal operation, and the lower schematic shows them covered before beginning a duct leakage test.

These two schematics show the plan-view of the same duct system; the upper schematic shows all supply and return outlets and inlets uncovered for normal operation, and the lower schematic shows them covered before beginning a duct leakage test.
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This “high static ducted cassette” heat pump system is similar to a traditional centrally ducted system, serving several areas of a home from one indoor unit

This “high static ducted cassette” heat pump system is similar to a traditional centrally ducted system, serving several areas of a home from one indoor unit
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This air filter is too big for the air filter slot; the filter should not be installed diagonally; it should lay flat against the opening.

This air filter is too big for the air filter slot; the filter should not be installed diagonally; it should lay flat against the opening.
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This air handler is located within the homes conditioned space in a closet on the main floor of the home (Source: Tommy Williams Homes).

This air handler is located within the homes conditioned space in a closet on the main floor of the home (Source: Tommy Williams Homes).
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This air handling unit provides outside air at the same rate as the air being exhausted from the bathroom exhaust fan; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake and dehumidification is provided by a separate unit

This air handling unit provides outside air at the same rate as the air being exhausted from the bathroom exhaust fan; local kitchen exhaust is provided by a range hood with a dedicated makeup air intake and dehumidification is provided by a separate unit
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This air register has noticeable gaps between it and the floor; use canned spray foam to fill in the gaps.

This air register has noticeable gaps between it and the floor; use canned spray foam to fill in the gaps.
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This awning came in a kit with the brackets, roof, and fasteners included; follow manufacturer instructions to ensure proper installation.

This awning came in a kit with the brackets, roof, and fasteners included; follow manufacturer instructions to ensure proper installation.
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This bath exhaust fan ventilation control can be set by the HVAC technician for continuous operation, delayed shut off, or a set amount of minutes each hour

This bath exhaust fan ventilation control can be set by the HVAC technician for continuous operation, delayed shut off, or a set amount of minutes each hour
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This building has a south facing Trombe wall to take advantage of passive solar heating.

This building has a south facing Trombe wall to take advantage of passive solar heating.
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This building is constructed using poured concrete walls

This building is constructed using poured concrete walls
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This central ventilation system uses an energy recovery ventilator to supply air to the corridor and exhaust air from the elevator shaft of a multifamily building

This central ventilation system uses an energy recovery ventilator to supply air to the corridor and exhaust air from the elevator shaft of a multifamily building
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This central ventilation system uses an energy recovery ventilator, pre-conditioning unit, and elevator shaft exhaust fan to supply air to dwelling units and corridors and to exhaust air from units and the elevator shaft in a multifamily building

This central ventilation system uses an energy recovery ventilator, pre-conditioning unit, and elevator shaft exhaust fan to supply air to dwelling units and corridors and to exhaust air from units and the elevator shaft in a multifamily building
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This depiction of a saddle installed window heat pump does not obstruct window use and provides fairly quiet 120 Volt operation

This depiction of a saddle installed window heat pump does not obstruct window use and provides fairly quiet 120 Volt operation