ECO / green options for insulating HVAC duct work

ACtawk

Hello -
I am replacing my HVAC duct system in my attic. Going from duct-board /flex duct - to an all metal duct system.

My question is - I dont want to insulate the new system with fiberglass. My HVAC guy says he can glue reflective bubble wrap directly to the metal and tape all seams- rather than use fiberglass.

Is this a good option? Are there better options for insulating duct work? I have heard of using cotton fiber as regular insulation - but I havent read about it being used as duct insulation.

My goals are to insulate the duct work so it doesnt sweat - or lose heat. I also want to improve indoor air quality.

thanks

beenthere

I believe Reflectic needs a spacer between it and the duct to achieve an R8 value.

kenmac

Just have him insulate it on the outside instead of inside

beenthere

Reflextics would be put on the outside.