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A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance.

A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance.
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A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi-pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance

A central heat pump water heating system with a parallel loop tank temperature maintenance configuration uses a multi-pass heat pump water heater to provide all the heat for hot water circulation temperature maintenance
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A central heat pump water heating system with a temperature maintenance swing tank configuration uses the water from the primary storage tank to provide most of the heat for hot water circulation temperature maintenance

A central heat pump water heating system with a temperature maintenance swing tank configuration uses the water from the primary storage tank to provide most of the heat for hot water circulation temperature maintenance
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A central rooftop fan supplies outdoor air to all floors of a multistory multifamily building, pressurizing the corridors and providing make-up air for the elevator shaft, which is depressurized by an exhaust fan.

A central rooftop fan supplies outdoor air to all floors of a multistory multifamily building, pressurizing the corridors and providing make-up air for the elevator shaft, which is depressurized by an exhaust fan.
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A central rooftop fan supplies preconditioned outdoor air to every floor of a multistory multifamily building, pressurizing the corridors and providing make-up air for the elevator shaft, which is depressurized by an exhaust fan.

A central rooftop fan supplies preconditioned outdoor air to every floor of a multistory multifamily building, pressurizing the corridors and providing make-up air for the elevator shaft, which is depressurized by an exhaust fan.
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A ceramic panel provides the thermal break in the slab at the exterior wall of a multistory multifamily building; steel bolts provide structural support through the thermal break

A ceramic panel provides the thermal break in the slab at the exterior wall of a multistory multifamily building; steel bolts provide structural support through the thermal break
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A circuit breaker panel with space for two circuit breakers to support the installation of an L2 charger.

A circuit breaker panel with space for two circuit breakers to support the installation of an L2 charger.
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A coated OSB product with taped seams covers the walls to serve as both sheathing and weather-resistant barrier.

A coated OSB product with taped seams covers the walls to serve as both sheathing and weather-resistant barrier.
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A combination of brackets and self-locking drawers. Drawer closures should be used to protect the home during seismic events.

A combination of brackets and self-locking drawers. Drawer closures should be used to protect the home during seismic events.
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A common method of addressing significant groundwater leakage in the foundation is to line the entire foundation assembly, including the slab, with a drainage layer.

A common method of addressing significant groundwater leakage in the foundation is to line the entire foundation assembly, including the slab, with a drainage layer.
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A common method of addressing significant groundwater leakage in the foundation is to line the interior perimeter of the foundation with a drainage layer.

A common method of addressing significant groundwater leakage in the foundation is to line the interior perimeter of the foundation with a drainage layer.
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A comparison of a dirty furnace filter on left and clean filter on right. Dirty filters block airflow and make the furnace or air handler work harder.

A comparison of a dirty furnace filter on left and clean filter on right. Dirty filters block airflow and make the furnace or air handler work harder.
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A complete HVAC system includes ducted returns

A complete HVAC system includes ducted returns
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A concrete skirt provides pest resistance at the building perimeter

A concrete skirt provides pest resistance at the building perimeter
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A concrete slab floor can be elevated above local grade as a strategy to prevent flood damage.

A concrete slab floor can be elevated above local grade as a strategy to prevent flood damage.
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A concrete slab-on-grade foundation with exterior insulation, which can be elevated above the local grade as a flood-prevention strategy.

A concrete slab-on-grade foundation with exterior insulation, which can be elevated above the local grade as a flood-prevention strategy.
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A condensing boiler and indirect domestic hot water

A condensing boiler and indirect domestic hot water
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A cone or disc of plastic or sheet metal can be installed on pipes and downspouts to prevent rodents from climbing up the outside and gaining access to the roof

A cone or disc of plastic or sheet metal can be installed on pipes and downspouts to prevent rodents from climbing up the outside and gaining access to the roof
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A constant airflow regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels

A constant airflow regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels
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A constant airflow regulator is fitted into the neck of the supply duct to control air flow to deliver the design airflow regardless of pressure variations

A constant airflow regulator is fitted into the neck of the supply duct to control air flow to deliver the design airflow regardless of pressure variations
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A continuous bead of sealant is installed to air seal along the top and bottom plates at all exterior walls and intersecting interior walls as well as around windows in exterior walls

A continuous bead of sealant is installed to air seal along the top and bottom plates at all exterior walls and intersecting interior walls as well as around windows in exterior walls
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A continuous drainage mat rainscreen made from vacuum-molded plastic provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.

A continuous drainage mat rainscreen made from vacuum-molded plastic provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.
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A continuous layer of polyethylene covers the crawlspace floor and is attached to the wall with wood nailing strips

A continuous layer of polyethylene covers the crawlspace floor and is attached to the wall with wood nailing strips
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A continuous load path uses structural connections to transfer horizontal and vertical loads from the roof to the foundation to help keep the building intact in high-wind and seismic events

A continuous load path uses structural connections to transfer horizontal and vertical loads from the roof to the foundation to help keep the building intact in high-wind and seismic events