Ken Meyer Posted July 1, 2009 Report Share Posted July 1, 2009 Is this heat duct insulation considered a combustible material? The combined furnace/water heater exhaust flue is almost touching it, but I could see no sign of damage from heat. Click to Enlarge 42.64 KB Quote Link to comment Share on other sites More sharing options...
John Dirks Jr Posted July 1, 2009 Report Share Posted July 1, 2009 Just curious but how far from the furnace and water heater is this contact point? Quote Link to comment Share on other sites More sharing options...
Brandon Whitmore Posted July 1, 2009 Report Share Posted July 1, 2009 If it is not classified as non- combustible material, then it should have proper clearances (1"). I doubt that the stuff in the picture is classified as non- combustible. I'd write it up, state my case, and if they could prove otherwise so be it. Quote Link to comment Share on other sites More sharing options...
Ken Meyer Posted July 1, 2009 Author Report Share Posted July 1, 2009 Just curious but how far from the furnace and water heater is this contact point? Between 5 and 6 feet. I'll include it in the report as Brandon suggested, better safe than sorry. Quote Link to comment Share on other sites More sharing options...
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