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4 post(s) First 1 Last
R-value of flex duct
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Re: R-value of flex duct By  simon says

Posts: 0

1/21/2009 8:07:00 AM

Check in the applicable edition of the International Energy Conservation Code adopted by your jurisdiction. Refer to Section 403.2 "Ducts". Determine your area''s "climate zone" for any other insulation value requirements.


Re: R-value of flex duct By  jar546

Posts: 0

1/21/2009 9:07:00 AM

There is no R value required for ducts located within the building thermal envelope. I am assuming this is residential.

Outside the envelope required R-8

It does not matter what climate zone you are in.


Re: R-value of flex duct By  paul curry

Posts: 0

1/21/2009 9:10:00 AM

2006 IECC 403.2 Supply and return ducts shall be insulated to a minimum of R-8, in floor trusses, R-6.

EXCEPTION! Ducts within the building thermal envelope do NOT need to be insulated.

Now, you say the ducts are in the home''s envelope... are they in the THERMAL envelope? that means, within the insulated space, not in the uninsulated attic, etc.


Re: R-value of flex duct By  Jeff2121

Posts: 0

1/21/2009 9:54:00 AM

Thank you all, you guys have been very helpfull........Jeff


4 post(s) First 1 Last
Code Official Institute - December 2014
2015 I-Codes