Installed the right way, flexible duct is a great ventilation product for a great many applications. Sometimes, however, hurried installations create poor-quality results - as they can for any HVACR ...
The K-Flex Gray™ elastomeric insulation duct liner has been improved. It now has an R-value of 4.2, which meets the Energy Conservation Code requirements of states that require a 4.2 R-value in ...
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