[protechplumbing]

Is there any reason why one wouldn't want to use thermasheath 3 as duct board?

It has great r-value. Pretty rigid. Impermeable. Could be a fire hazard though

[flashheatingand]

How does it compare pricewise towards say, flex duct?

[MechanicalDVR]

I would say the "fire hazzard" would be a good reason not to use it. Ever hear of ductboard? It's way cheaper than metal all the way around.

[protechplumbing]

I'm not trying to use it in place of flex, I'm wondering if it would be a good idea to use it instead of fiberglass ductboard.

[MechanicalDVR]

Originally Posted by protechplumbing

I'm not trying to use it in place of flex, I'm wondering if it would be a good idea to use it instead of fiberglass ductboard.

In a word, NO. You will find there are specific materials approved for specific uses, such the need for UL labs and SMACNA, etc, etc. If you use a bogus material in someone elses dwelling, guess who owns it forever in the eyes of the legal system?

[nhmaster3015]

Originally Posted by MechanicalDVR

In a word, NO. You will find there are specific materials approved for specific uses, such the need for UL labs and SMACNA, etc, etc. If you use a bogus material in someone elses dwelling, guess who owns it forever in the eyes of the legal system?

Bravo !

[protechplumbing]

Good point.