Portable AC unit out garage wall DIY

Ok so I got a quote to put a mini split in my garage and it was $5000 for a 18k BTU. I don't have that kinda money as much as I wish I did. I wanted to know if I put a portable AC unit and vent out my outside wall using a 6'' hooded wall vent with spring loaded damper (or some other kind) would this work? Last summer my garage got up to around 88°f (on about 100deg day) and that was with a non-insulated door. I have insulated my garage door (yesterday so no real testing yet). But am looking to just take down the extremes of temperature to a more manageable level. So for me I think if I can get it down to 78-80° f I would be happy. I know 12-14k BTU portable units exist so I was just curious is this feasible. Can this be done reasonably as a DIY project? or am I SOL? submitted by /u/frankp2491 [link] [comments]

Mar 29, 2025 - 19:56

Ok so I got a quote to put a mini split in my garage and it was $5000 for a 18k BTU. I don't have that kinda money as much as I wish I did. I wanted to know if I put a portable AC unit and vent out my outside wall using a 6'' hooded wall vent with spring loaded damper (or some other kind) would this work? Last summer my garage got up to around 88°f (on about 100deg day) and that was with a non-insulated door. I have insulated my garage door (yesterday so no real testing yet). But am looking to just take down the extremes of temperature to a more manageable level. So for me I think if I can get it down to 78-80° f I would be happy. I know 12-14k BTU portable units exist so I was just curious is this feasible.

Can this be done reasonably as a DIY project? or am I SOL?

submitted by /u/frankp2491
[link] [comments]