12 Inch Insulated Duct,HVAC Insulation Duct,Insulated Flex Duct, AC Fleixble Duct,HVAC Ducting, Insulation Duct,12''25 'Insulated Flexible Ducting,R-4.2 for Heavy Duty HVAC & Exhaust Ductwork

A great product. Highly recommended.

Awesome

This product was very disappointing for two reasons. First, the inner aluminum foil duct was so thin and flimsy that it was impossible to get it onto the vent structure without tearing. I finally just wrapped aluminum tape around it to stiffen and reinforce it, and that worked marginally. Second, the duct clamps were not nearly long enough to wrap around the inner duct. They couldn't even wrap fully around the vent structure which is smaller than the duct! I had to use some other short clamps to attach to these to make them long enough to work. If I had not already cut the section of duct that I needed, I would have returned the whole mess. Don't waste your time on this junk!

The liner inside is very thin tears easily when hooking to duct boots or supply take offs