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Chapter 1
Introduction
Figure 5: Leak from Attached Porch
Figure 6: Common Kneewall Leak
Forced air system ductwork can also be a major air leakage site. Even small leaks in ductwork can result in
significant air leakage due to the high pressures found in ducts whenever the heating or cooling system is
operating. More information on duct leakage can be found in Chapter 9.
6
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