Return Flex Duct in Mobile Home
I work for a weatherization company that work on low-income family housing. At work there has been a debate about if the return flex duct that runs from the top of the mobile home furnace to the attic should be removed and sealed or left as is. A blower door is performed to see what the mobile home’s air infiltration rate is and we adhere to the ASHRAE 2016 standards (installing exhaust fans etc.). Should it be removed or should it stay and for what purpose was this flex duct installed to the return coming from the attic?
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