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Can you run supply plumbing through a cold air return duct How about wiring as well?

April 26, 2017air cold duct plumbing Return run supply wiring

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Can you run supply plumbing through a cold air return duct How about wiring as well?

1 Answer

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However, I have seen the low voltage wiring for the A/C thermostat run through the return air ductwork. Also, if you have a smoke/fire shut-off for an A/C, wiring for that will also be located in the return air duct.