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These snow guards help to keep snow from sliding off the roof and injuring people below.

These snow guards help to keep snow from sliding off the roof and injuring people below.
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This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a multi pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance

This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a multi pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance
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This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a single pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance

This central heat pump water heating system with a hot water circulation loop that returns to the primary storage tank relies on a single pass heat pump to provide both primary DHW heating and hot water circulation temperature maintenance
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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 has heat loss through the roof, leading to ice dam formation and structural issues during winter months.

This home has heat loss through the roof, leading to ice dam formation and structural issues during winter months.
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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 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 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 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 thermal image of an interior storm window shows how much temperature change occurs between the interior storm window panel on the right, at 50F and the existing glass on left at approximately 0F

This thermal image of an interior storm window shows how much temperature change occurs between the interior storm window panel on the right, at 50F and the existing glass on left at approximately 0F
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Three inches of closed-cell spray foam (R-19) and 7.5 inches (R-28) of open-cell spray foam was installed below the roof sheathing in this cathedral ceiling.

Three inches of closed-cell spray foam (R-19) and 7.5 inches (R-28) of open-cell spray foam was installed below the roof sheathing in this cathedral ceiling.
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To increase surface area and reduce pressure drop for high MERV filters, the return duct can be constructed to permit the installation of two furnace filters side by side

To increase surface area and reduce pressure drop for high MERV filters, the return duct can be constructed to permit the installation of two furnace filters side by side
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Transfer grill sealed with mastic

Transfer grill sealed with mastic
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Transfer grille not sealed

Transfer grille not sealed
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Twisting and compressing flex duct will block air flow

Twisting and compressing flex duct will block air flow
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Types of heat pump water heaters commonly used in central heat pump water heating systems include single pass units, multi pass units, and integrated units

Types of heat pump water heaters commonly used in central heat pump water heating systems include single pass units, multi pass units, and integrated units
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Typical roof truss top chord bracing

Typical roof truss top chord bracing
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Unfaced fiberglass batt insulation is installed to completely fill the wall cavities and is sliced to fit around wiring, piping, and other obstructions in the wall cavities

Unfaced fiberglass batt insulation is installed to completely fill the wall cavities and is sliced to fit around wiring, piping, and other obstructions in the wall cavities
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Unvented Attic Insulation (1)

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Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas

Unvented concrete masonry unit crawl space with exterior insulation - designed for termite resistance in moderately infested areas
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Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and a fully adhered membrane seal at the top of wall-to-roof transition

Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and a fully adhered membrane seal at the top of wall-to-roof transition
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Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and taped top edge of existing house wrap or building paper

Unvented roof assembly at eave retrofitted with rigid foam, spray foam, and taped top edge of existing house wrap or building paper
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Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition

Unvented roof assembly at rake retrofitted with a filler piece and taped top edge of existing house wrap or building paper to seal the top of wall-to-roof transition