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How to seal this open duct?
(lemmy.world)
Found this in a cabinet under the stove. I think it's old ventilation from before the induction burner was installed. Not sure how to seal it off.
I replaced the insulation with some new stuff first, but that is exactly what I ended up doing! It didn't vent anywhere. The back of the hole backed up to what felt like tar paper. I assume the back of the siding.