I am having a 2000sqft shop constructed on our farm in Hamilton, MT. I will be installing a RMH to heat the space, but this will occur later this summer. The shop is currently being framed with roof to be installed next week. I want to have the GC install the necessary exhaust pipe at this time, so I can simply tie in when I install later this year. Can someone identify exhaust pipe diameter recommended, as well as any particular specs for the pipe for long term performance.
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