Building a chase for my englander 30 wood stove. the chimney is straight up and will be using the Duraplus 6" pipe. it says 2" clearance for combustables. so should i just make a wood frame and wrap with drywall or should i have something on the inside of the chase also (fire retardent material)? or just the 2" clearance?
Building a chase
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All you need is a 2" AIR SPACE clearance around the pipe all the way up. You could make a cylindrical wood structure exactly 2" away all the way around and it would be safe according to UL testing.
If you do put insulation inside the chase make sure it is secured so it could never slump and fall onto the side of the pipe.
Also the 2" clearance is not a "to combustibles" clearance, it is an AIR SPACE clearance. Which means the only thing allowed in that 2" space around the pipe is air. Only exception is UL approved firestops and roof flashings.
Also the 2" clearance is not a "to combustibles" clearance, it is an AIR SPACE clearance. Which means the only thing allowed in that 2" space around the pipe is air. Only exception is UL approved firestops and roof flashings.
Yeah so i just need a 2" gap around on all sides. so the outside of the chimney is 10" in dia so i would need a 14" area. thanks
jtp10181 said:
hmm...
I just installed my chimney this weekend and I have it passing through a hole in the 1/16" aluminum soffit which is cut to size of the pipe. Is that a problem? After the soffit piece, it passes through the soffit and roof with a standard roof flashing.
No an alum soffit should be fine, that's basically the same thickness as a fire stop. If it was a 1ft thick concrete slab then the hole would have to be 2" bigger than the pipe.
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