Barrier around flue pipe

[Buck Hartley, CMI]

Would anyone recommend a barrier between the insulation and this furnace flue? The insulation does not support combustion but it will char with direct heat. I tested it outside.

[Larry D. Kage]

Originally Posted by bhartley

Would anyone recommend a barrier between the insulation and this furnace flue?

Yes, it an insulation dam is required around here.

Originally Posted by bhartley

The insulation does not support combustion but it will char with direct heat. I tested it outside.

How hot did you get it?...and for how long? I'd be careful making these type of statements.

Though treated with a fire retardant, it is not fire proof and some testing shows that the retardant looses effectiveness with time.

[Buck Hartley, CMI]

Larry,

Thanks! I did not make that statement in the report.

[Joe Funderburk, CMI]

Around cellulose, definitely.