duct 6" adapter for aprilaire 500 600 400 furnace humidifier
Description
this goes on the outlet because they dont wanna make it easy and let a 6 inch duct slip in . they made it 6 1/4" so this adapter is needed for a common 6"id duct....this duct runs back to the blower bottom chamber of ur furnace to put the himidified air into heater ducts throughout house :)
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