Breaker box is in the basement, opposite end of a ranch house. Running wire from there up to the attic and over and back down nearly 100' is not a trivial or inexpensive task. If I can avoid it I'd rather. It will probably eventually happen but not today ;-).
Also, you;re on the wrong side of DC and the rest of Maerry-Land for that to not be a painful drive.
There actually is a ventt hat the original owner put in. Its a single 3x10 at the floor on the house side. It was pretty much useless (1 bc its just too small, 2 bc its so far from teh furnacet he air coming out its even that hot). The bigger problem was that it allowed "garage smells" into the house way too easily. Its been blocked off for years.
You mean like this one?
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I quite love this solution. The only reason I won't do it is bc I'd have to turn it around again in the summer, which kills the lazy vibe.
Although, I DO have another window unit sitting in the shed... and 1 more window.... hm. Would have to deal with the drainage too.