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Joined: Oct 2002
Posts: 830
S
Member
Can anyone refresh me as to the wiring method in a "fresh air" plenum?? The heat/ac man is using a void space as part of the "air return". I don't have the exact code reference right now. Thanks for the input... Steve

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Joined: Aug 2003
Posts: 1,374
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I think the most important question at this point to ask is: is this residential or commercial?

300.22 addresses plenums


Ryan Jackson,
Salt Lake City

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