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Question about old (circa 1999/2000) ADP airhandler
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HydroAirJoe
Member Posts: 27
I had a quick question about an old ADP airhandler (approx 1999/2000) with hot water heating coil. What is the construction of the coil tubes? I'm assuming it's copper. Asking because I want to make sure I use correct antifreeze in the system. I know they are copper on the Firstco unit that was put in as part of an house addition.
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