Darren Emery
Registered User
Ground based HVAC unit for a gymnasium. Plans called for exterior duct insulation and protective wrap. Contractor and engineer now saying the R-4 interior insulation on this duct is sufficient. R-8 is required (2009 ECC adopted), but I'm also concerned about the insulation being on the inside of the duct, rather than the outside. Seems to me that condensation and mold is a likely problem in the future. Would appreciate thoughts on this one - we just recently began enforcing the ECC.
BTW - we are in Kansas, so we have both extremes: -10 to about 106.
BTW - we are in Kansas, so we have both extremes: -10 to about 106.
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