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The sump pump is sealed to the subslab vapor barrier with sealing tape to prevent soil gas from leaking around the sump bucket.

The sump pump is sealed to the subslab vapor barrier with sealing tape to prevent soil gas from leaking around the sump bucket.
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The ultra-efficient air-to-water heat pump draws heat from the outside air to heat inside room air in winter and domestic hot water year-round.

The ultra-efficient air-to-water heat pump draws heat from the outside air to heat inside room air in winter and domestic hot water year-round.
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The ultra-efficient ground-source heat pump provides the home with forced-air heating and cooling, and hot water.

The ultra-efficient ground-source heat pump provides the home with forced-air heating and cooling, and hot water.
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The valve for the cold-water inlet pipe is a lever-style valve located up high; if there's an expansion tank, it is connected to the cold water line and the valve is typically upstream of the expansion tank (connected here by white horizontal pipe).

The valve for the cold-water inlet pipe is a lever-style valve located up high; if there's an expansion tank, it is connected to the cold water line and the valve is typically upstream of the expansion tank (connected here by white horizontal pipe).
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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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The wall hung boiler provides heat for the central air handler as hot water.

The wall hung boiler provides heat for the central air handler as hot water.
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The water heater and other appliances are located above the Base Flood Elevation.

The water heater and other appliances are located above the Base Flood Elevation.
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The water heater tank can drain to a floor drain (left) or the yard or curb drain (right).

The water heater tank can drain to a floor drain (left) or the yard or curb drain (right).
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The white arrows indicate the location of the air filters in two different tankless water heaters.

The white arrows indicate the location of the air filters in two different tankless water heaters.
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Thermosiphon solar hot water system

Thermosiphon solar hot water system
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Thermosyphon solar hot water heater (commercial application).

Thermosyphon solar hot water heater (commercial application).
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This ambient-drafted gas water heater has backdrafted in the past or is actively, as indicated by melted plastic rings around the gas pipes and soot spots on top of the tank; backdrafting brings dangerous carbon monoxide into the home.

This ambient-drafted gas water heater has backdrafted in the past or is actively backdrafting, as indicated by the melted plastic rings around the gas pipe and soot spots on the top of the tank; backdrafting brings dangerous carbon monoxide into the home.
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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 cold-water inlet valve has a wheel-style handle. It is closed by turning the wheel clockwise.

This cold-water inlet valve has a wheel-style handle. It is closed by turning the wheel clockwise.
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This flue pipe is sloping down rather than up so flue gases are likely to back up rather than exiting out of the house; this is a dangerous situation, call a plumber to make repairs as soon as possible.

This flue pipe is sloping down rather than up so flue gases are likely to back up rather than exiting out of the house; this is a dangerous situation, call a plumber to make repairs as soon as possible.
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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 gas water heater flue pipe is disconnected; this is a dangerous situation allowing carbon monoxide and other combustion emissions to escape into the home; call a plumber to make repairs as soon as possible

This gas water heater flue pipe is disconnected; this is a dangerous situation allowing carbon monoxide and other combustion emissions to escape into the home; call a plumber to make repairs as soon as possible
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This Heat Pump changes EVERYTHING | R290 Heat Pump

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This heat pump water heater has been fitted with ducts to exhaust its waste cooling into the occupied living area

This heat pump water heater has been fitted with ducts to exhaust its waste cooling into the occupied living area
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This Heat Pump Water Heater has Pipe insulation installed on the hot water line (on left) and on the cold water line (on right)

This Heat Pump Water Heater has Pipe insulation installed on the hot water line (on left) and on the cold water line (on right)
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This heat pump water heater is centrally located in a laundry room so that all hot water uses are less than 15 feet from the tank.

This heat pump water heater is centrally located in a laundry room so that all hot water uses are less than 15 feet from the tank.
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This Heat Pump Water Heater is Sitting on an Insulation Pad to Reduces Heat Losses

This Heat Pump Water Heater is sitting on an insulation pad to reduces heat losses