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Old 3/15/10, 12:29 AM
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dgarton dgarton is offline
Certified Professional Inspector (CPI)
Join Date: Mar 2010
Location: Northern CA.
Posts: 420
Default ducting material

I have a client that has a home built in 1978. He is replacing his heating and AC unit. His HVAC guy says he needs to replace his duct pipes too. Does anyone know what type of material they used back then and how long it should last?