8531 Furnace Duct Adapter Install Questions
https://www.amazon.com/Hydro-Flame-Corp-31474-Adapter/dp/B00CLSWS6I I have an 8531 furnace with 4" knockouts for the ducts. The duct adapter is listed as 1474 in the manual, but get this on Amazon...
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If you look closer there is a 'split' in flange that goes between furnace frame so after you remove knockout you slip it in and twist
Duct goes ON the stub and is held inplace via clamp
Duct goes ON the stub and is held inplace via clamp
