Pressure
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The Achilles’ Heel of Zoned Duct Systems
The way that many zoned duct systems handle excess air can create a few problems
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Four Ways Bad Duct Systems Can Lead to Poor Indoor Air Quality
Higher energy bills and lower comfort levels may not be the worst of your problems with faulty ducts
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What’s a Blower Door Good For?
Hint: It’s NOT 'natural' air changes per hour