Originally posted by abarrie
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and see what you have there. They make a under ground round duct that is pvc coated. it should have sand around it. they also have a pvc tape to seal the
pipe joints. I can't tell you what size you need unless i have the duct sizes that are there, how many hot air opening and the size of the duct feeding them. You
did not tell me the size of the house. If you have a lot of pipes coming off your plenum under the furnace then you might have trouble getting a 14 or 16" round to go to the new plenum. later paul
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