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Glossary

Air Pressure Boundary

The air pressure boundary is the boundary (comprised of a series of planes to form a three dimensional boundary) that generates the largest pressure drop (usually much more than half the total) when the enclosure is subjected to a pressure difference.

Related resources: RR-0403: Air Barriers, RR-9905: Air Pressure and Building Envelopes, Ventilation for New Low-Rise Residential Buildings