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Flu pipes and insulation

1653 Views 3 Replies 2 Participants Last post by  josall
Per my understanding, double wall pipe from the ceiling line all the way through the attic and out is code? Can I assume it is then safe to blow cellulose insulation right up against the pipe in that case? I have an 80% furnace and demand HWH (separate flues of course) and just get a little nervous about that I guess.
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