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.
Related Term: 
Air Infiltration Description
Unit of Measure: 
None
Sector: 
Commercial, Residential, Multifamily
Bedes version: 
Version 2.6
Term ID: e40ef6d1-b83e-4f58-bdb6-1e7c237b8672

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