Air Infiltration Description

Description of the infiltration characteristics for an opaque surface, fenestration unit, a thermal zone.

Data Type: 
Constrained List
Unit of Measure: 
Commercial, Residential, Multifamily
List Options Option Definition Unit of Measure Source
Average Average infiltration rate. N/A
Leaky High infiltration rate, many places in the premises where outside air can come into the conditioned space. N/A
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. N/A
Very leaky Very high infiltration rate. N/A
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. N/A
Term ID: 6a5b8647-f8b2-40f6-b379-5a4d4adac2e8