Monessen 4" Uninsulated Flex Duct For Outside Air 5lbs The 42ZCBB offers an efficient

The 42ZCBB offers an efficient heat circulating design which keeps warm air flowing

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Monessen 4" Uninsulated Flex Duct For Outside Air 5lbs The 42ZCBB offers an efficientUninsulated Flex Duct The Monessen UD4 4 inch Uninsulated FlexDuct for Outside Air is just one of the many options offered by Monessen. This particular FlexDuct is 4" (100 mm) in diameter. The model number refers to two 42" (1065 mm) sections. The FlexDuct is uninsulated, so it won't be moving incredibly hot air around. It's specifically designed to work well with outside air. Features Weighs 3 pound 4" (100mm) in diameter Uninsulated flex duct for