Why do I have to change the roof jack bonnet when I install a new draft-induced 80% natural gas furnace?
Posted by Elite Deals - Chris M. on 28 October 2013 12:43 PM

Our Answer:

Every chimney system must use an appropriately-sized roof flashing/roof jack that is made for the particular type and size of pipe for proper UL listing.

From Page: Dura-Vent Type B Type B Vent Pipe

Page ID: duravent-type-b-vent-pipe

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