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Old 01-24-2007
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I don't see why you couldn't use PVC pipe, rather than sheet metal, for the duct work... It really depends on how hot the air gets from the heating side of the unit... I am guessing that you're using a heat pump/AC heating unit rather than diesel or propane forced hot air, so it probably wouldn't get hot enough to be a problem. PVC pipe acts as a insulator to some degree, so the heat loss/gain would be minimized, and it is less maintenance than sheet metal, which will rust out...

Even if you use sheet metal for the ductwork, the vent openings could be made from PVC pipe relatively easily, and allow you to open and close the vents as needed.

One issue I see with having the vents directly beneath the ports is if the ports leak, it might cause some problems..
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Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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