Description of the infiltration characteristics for an opaque surface, fenestration unit, a thermal zone.
Air Infiltration Description
|List Options||Option Definition||Unit of Measure|
|Average||Average infiltration rate.||None|
|Leaky||High infiltration rate, many places in the premises where outside air can come into the conditioned space.||None|
|Not applicable||Not applicable||None|
|Tight||Low infiltration rate. The 2012 IECC code requires between 3 and 5 ACH (air changes per hour) @ 50 pascals pressure for new construction (depending on the climate zone). The ENERGY STAR Certified Homes program requires between 3 and 6 ACH depending on the climate zone.||None|
|Very leaky||Very high infiltration rate.||None|
|Very tight||Very low infiltration rate. The Passive House standard for air infiltration rate is <= 0.5 ACH at 50 pascals, which means the premises is virtually air tight. Infiltration levels this low usually require mechanical ventilation (with a heat exchange) to provide adequate interior air quality.||None|
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