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Insulating a crawlspace foundation with “cripple wall” in warm climates; in Climate Zones 5+ replace the foil- or plastic-faced fiberglass batt/roll insulation with impermeable rigid insulation or closed-cell spray polyurethane foam

Insulating a crawlspace foundation with “cripple wall” in warm climates; in Climate Zones 5+ replace the foil- or plastic-faced fiberglass batt/roll insulation with impermeable rigid insulation or closed-cell spray polyurethane foam
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Insulation does not cover boot and is not sealed

Insulation does not cover boot and is not sealed
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Insulation does not cover boot and is not sealed

Insulation does not cover boot and is not sealed
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Insulation does not cover boot and is not sealed

Insulation does not cover boot and is not sealed
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Interior Air Barrier

Interior Air Barrier
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Intermittent supply and exhaust fans rated at ≤ 3 sones by manufacturer, unless rated flow ≥ 400 CFM

Intermittent supply and exhaust fans rated at ≤ 3 sones by manufacturer, unless rated flow ≥ 400 CFM
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Karuna Passive House Air-To-Water Heat Pump

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Karuna Passive House HRV Supply Register

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Karuna Passive House Ventilation System

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Kitchen exhaust properly installed and sealed with mastic

Kitchen exhaust properly installed and sealed with mastic
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Kitchens should be equipped with an exhaust fan that vents directly outdoors

Kitchens should be equipped with an exhaust fan that vents directly outdoors
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Leaks at the air filter cover panel can draw in unconditioned or undesirable air

Leaks at the air filter cover panel can draw in unconditioned or undesirable air
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Locate the fresh air intake away from pollution sources and in an easily accessible location

Locate the fresh air intake away from pollution sources and in an easily accessible location
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Lower-cost local ERVs are usually installed in a ceiling to supply outdoor air to and exhaust air from the room in which they are located

Lower-cost local ERVs are usually installed in a ceiling to supply outdoor air to and exhaust air from the room in which they are located
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Madrona Passive House | CO2 Fired Heat Pump

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Make sure nearby air-moving equipment is not on during airflow measurements.

Make sure nearby air-moving equipment is not on during airflow measurements.
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Manual D details show duct size and chase path

Manual D details show duct size and chase path
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Manually seal around ceiling registers with foil tape

Manually seal around ceiling registers with foil tape
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Manually seal around ceiling registers with mastic

Manually seal around ceiling registers with mastic
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Manually seal around the return plenum

Manually seal around the return plenum
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Manually seal around the supply plenum

Manually seal around the supply plenum
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Manually seal seams in the air handler box with foil tape

Manually seal seams in the air handler box with foil tape
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Manually seal seams in the return plenum

Manually seal seams in the return plenum
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Manufacturer labeled controls

Manufacturer labeled controls