I ran double walled off stove to triple walled the rest of the way I think it was code I was following, anyways building inspector signed off on it. However if I could do it all over would have drawn up my floor plan different so the wood stove and pipe went out end wall and up the gable end outside instead of passing thru ceiling, upstairs floor, knee wall and eventually a 10 pitch metal roof. Never imagined the pia it was to flash a stove pipe on a metal roof. I feel a overkill of snow stops problaby saved that pipe from 3 feet of snow sliding off roof at times. In contrast I only used a few for the down stairs bathroom PVC vent soil stack bloody snow coming off roof snapped it flush with roof. Luckily it was above my utility room and I didn't finish the drywall in there so I cut an access hole replaced pipe with a coupler and left over PVC I saved and added a bunch of extra snow stops above and around it on roof.Yep. I also drive by flue temp, to some degree. I have a surface-mount one on single-wall stove pipe on one stove, and a probe type on the double-wall pipe on my other stove. Since they’re catalytic stoves, I also have a cat probe thermometer on each. One has a very tall flue, so I added a key damper and magnehelic to that one, to dial draft down appropriate to conditions.
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