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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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Make sure the ground bonding wire is securely fastened to the pump’s bonding lug

Make sure the ground bonding wire is securely fastened to the pump’s bonding lug
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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
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Manufacturer labeled ventilation switch

Manufacturer labeled ventilation switch
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Measure the air filter space in the return grille of the HVAC system to determine the thickest air filter the space will accommodate, in this case two inches.

Measure the air filter space in the return grille of the HVAC system to determine the thickest air filter the space will accommodate, in this case two inches.
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Mechanical damper installed

Mechanical damper installed
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Mechanically fastened and sealed

Mechanically fastened and sealed