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Commercial duct insulation

Uncle Bob

Uncle Bob

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Joined
Oct 17, 2009
Messages
1,409
Location
Texas
I think I'm on the right track; but, want to double check with you folks who are doing more commercial work. 2009 IECC; 503.2.7 " All supply and return air ducts and plenums shall be insulated with a minimum of R-5 insulation when located in unconditioned spaces and a minimum of R-8 insulation when outside the building." I've only seen R-6 being used inside the building. So all ducts within the building could be a minimum of R-5? I know it's a silly question, but have been doing very little commerical for some time now. Thanks, Uncle Bob
 
Uncle Bob said:
I think I'm on the right track; but, want to double check with you folks who are doing more commercial work. 2009 IECC; 503.2.7 " All supply and return air ducts and plenums shall be insulated with a minimum of R-5 insulation when located in unconditioned spaces and a minimum of R-8 insulation when outside the building." I've only seen R-6 being used inside the building. So all ducts within the building could be a minimum of R-5? I know it's a silly question, but have been doing very little commerical for some time now. Thanks, Uncle Bob
Click to expand...
2009 lists R5 and 2012 lists R6
 
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