Best temp option to block a fan hole in drywall

Ok so I got my ac replaced last year around November. I I turned on the ac this year already since it’s pretty warm and to my surprise it works amazing but seems to be over working do to having an old fan vent that leads to the attic and well it’s sucking all the hot air from the attic through the hole. I don’t use that fan no more so it’s just sitting. While I get it patched professionally, I wanted to use a piece of plywood to seal it so it doesn’t pull the hot air back in. Would plywood be a really good seal for the time being. I would buy some type of gasket so it presses tight. Someone recommended particle board but I’m not convinced. Anyone thing plywood is good enough? Any recommendations thanks submitted by /u/boshoss1986 [link] [comments]

Apr 5, 2025 - 21:47

Ok so I got my ac replaced last year around November. I I turned on the ac this year already since it’s pretty warm and to my surprise it works amazing but seems to be over working do to having an old fan vent that leads to the attic and well it’s sucking all the hot air from the attic through the hole. I don’t use that fan no more so it’s just sitting. While I get it patched professionally, I wanted to use a piece of plywood to seal it so it doesn’t pull the hot air back in. Would plywood be a really good seal for the time being. I would buy some type of gasket so it presses tight. Someone recommended particle board but I’m not convinced. Anyone thing plywood is good enough? Any recommendations thanks

submitted by /u/boshoss1986
[link] [comments]