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You are here: Knowledge Base : Tightness
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Building Tightness Limits
  Building Tightness Limits (BTL) can provide a guideline for tightening up a house. (Parts of this are excerpted from The Residential Ventilation Handbook by Paul H. Raymer published by M
RESNET 380-2016 Standard
ANSI/RESNET/ICC 380-2016 Standard for Testing Airtightness of Building Enclosures, Airtightness of Heating and Cooling Air Distribution Systems, and Airflow of Mechanical Ventilation Systems. "Standar