Tag: air-sealing
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Air Leakage at Electrical Switches and Outlets
Subtitle: How I blew a gasket and exposed the hole in one air-sealing method Images: One thing that invariably surprises people when I walk them through a house during their first blower-door testTest used to determine a home’s airtightness: a powerful fan is mounted in an exterior door opening and used to pressurize or depressurize…