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Old Gravity Furnace Thingy

Brad Manor

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Today's inspection had an old gravity furnace - something which I almost never see. I know somebody'll probably tear me a new one for not knowing, but what the heck is that box on the vent? At first I assumed it was some sort of barometric damper, but when I looked inside it seemed more like some sort of Willy Loman-esque contraption designed to spill flue gases into the home.

Alright, lemme have it.....


(gravity furnaces - one more thing I missed out on being born in the 70s)

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