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  1. C

    Washroom Exhaust Fan Through a Flat Roof

    My wife and I purchaced a house built in 1970 a couple years ago. It has a low slope roof (2 in 12) with no traditional attic, but instead the Ontario Building Code Minimum of 50mm inside of an 8" joist. Insulation is limited to R20. The original exhaust fan didn't move much, if any, air from...
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