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 September/October 2002 Issue
An Easier Way to Measure Duct Leaks 
by Iain Walker and Max Sherman
Regular readers of Home Energy are familiar with the problems associated with duct leakage in residences: heating and cooling energy losses, house pressurization, added infiltration, and indoor air quality (IAQ) problems. (See “Only Testing Will Tell,” HE Jan/Feb ’02, p. 24, and “Chasing Interior Ducts,”HE May/June ’02, p. 24.) Many utility and weatherization programs, together with some new building codes, aim to reduce duct leakage. There are tests that diagnose and measure duct leakage, but these have significant limitations (see “Current Methods”).
The most widely used duct leakage measurement techniques involve duct pressurization and differ by...
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