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This wall-mounted high-efficiency condensing gas tankless water heater has PVC vent pipes and insulated water pipes

This wall-mounted high-efficiency condensing gas tankless water heater has PVC vent pipes and insulated water pipes
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This water filter from a tankless water heater is very clogged with debris.

This water filter from a tankless water heater is very clogged with debris
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This water heater drain valve is operated by hand.

This water heater drain valve is operated by hand.
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This water heater drain valve is operated using a flat-head screwdriver.

This water heater drain valve is operated using a flat-head screwdriver.
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This water heater has the temperature settings on a control box attached to the front of the water heater.

This water heater has the temperature settings on a control box attached to the front of the water heater.
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This water heater is hidden behind stored items in the basement.

This water heater is hidden behind stored items in the basement.
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To adjust this water heater’s temperature, turn the dial to 120°F with a flathead screwdriver.

To adjust this water heater’s temperature, turn the dial to 120°F with a flathead screwdriver.
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To adjust this water heater’s temperature, turn the knob on the controller; refer to the owner’s manual to determine what setting corresponds to 120°F.

To adjust this water heater’s temperature, turn the knob on the controller; refer to the owner’s manual to determine what setting corresponds to 120°F.
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To close the valve on the cold water inlet, turn it so the lever is perpendicular to the pipe.

To close the valve on the cold water inlet, turn it so the lever is perpendicular to the pipe.
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To improve solar power production, builders and developers can plan subdivision lot lines and roads for predominantly north and south orientations.

To improve solar power production, builders and developers can plan subdivision lot lines and roads for predominantly north and south orientations.
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To move a water heater off a platform, wrap one end of a ratchet strap around the top of a hand truck and the other end to the water heater drain valve, tighten the strap, tip the water heater, and when the tank clear the platform, tighten the strap.

To move a water heater off a platform, wrap one end of a ratchet strap around the top of a hand truck and the other end to the water heater drain valve, tighten the strap, tip the water heater, and when the tank clear the platform, tighten the strap.
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To move a water heater, you can use two pieces of PVC or ABS pipe to roll it or a hoisting net lift to lift and carry it.

To move a water heater, you can use two pieces of PVC or ABS pipe to roll it or a hoisting net lift to lift and carry it.
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To test the water heater’s temperature, draw hot water from a faucet near the water heater for three minutes, then fill a mug with hot water from the tap and check the temperature with a meat thermometer.

To test the water heater’s temperature, draw hot water from a faucet near the water heater for three minutes, then fill a mug with hot water from the tap and check the temperature with a meat thermometer.
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Tubular pipe insulation sleeves come with a precut seam

Tubular pipe insulation sleeves come with a precut seam
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Turn a fixture on in the hot-water-only position prior to draining the water heater tank.

Turn a fixture on in the hot-water-only position prior to draining the water heater tank.
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Turn on power to the water heater from the circuit breaker.

Turn on power to the water heater from the circuit breaker.
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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 basement foundation and safe room.

Typical basement foundation and safe room.
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Typical ground-source plumbed system

Typical ground-source plumbed system
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Typical roof truss top chord bracing

Typical roof truss top chord bracing
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Uninsulated, unsealed, or missing rim joists allow attic air and heat into the floor cavity

Uninsulated, unsealed, or missing rim joists allow attic air and heat into the floor cavity
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University of Minnesota-NorthernSTAR: A Natural Gas-Fired Combi System for Space Heating and Hot Water

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Unsealed, uninsulated rim joists allow outside air and heat into the floor cavity

Unsealed, uninsulated rim joists allow outside air and heat into the floor cavity
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Unvented air-sealed crawlspace is insulated along the perimeter walls with rigid foam

Unvented air-sealed crawlspace is insulated along the perimeter walls with rigid foam