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» 4.2 Duct systems protected from construction debris AND no building cavities used as air supplies or returns
4.2 Duct systems protected from construction debris AND no building cavities used as air supplies or returns
To comply with the Indoor airPLUS and Zero Energy Ready Home programs, duct systems must be protected from construction debris AND no building cavities can be used as air supplies or returns.
The following Solution Center Guides provide more information about these measures: