Steel ducting is touching wood on the side…is this acceptable?
Using my iphone… Don’t see how to
Load a pic
David
What type of ducting are you referencing supply air, return air, flu exhaust
Rectangular supply air is insulated to the inside and is exceptble to touch wood
Round supply air should have insulation on the exterior and is exceptable to touch wood
Return air is exceptable both rectangular and round to touch wood
Metal flu ducting is not allowed to touch wood;-)
It’s for the flue…it’s steel type B…
One inch for class B double wall