Pressurization
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Radon Mitigation
There are passive and active systems for keeping radon gas from poisoning indoor air—here’s what to know to get them right
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An Introduction to Pressure Diagnostics
Fans, wind, and the stack effect cause some areas of your home to be pressurized and others to be depressurized
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Return-Air Problems
What happens when the bedroom doors are closed
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Pinpointing Leaks With a Fog Machine
Builders can use theatrical fog to find envelope holes