Window A/C box

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Project by Jim posted 419 days ago 935 views 6 times favorited 7 comments Add to Favorites Watch

Unusual Project: no central air in my workshop and portable a/c could not keep up with 95+ Texas heat. Window a/c was cheap solution but HOA rules would not allow it to hang out of window.

Solution was to build into the room. 6-inches of space on sides and top for ventilation, 3-sided screen to keep birds from nesting, and a drain fitting with a hose to control condensation. Box built with 3/4-inch ply and lag bolted into window frame. Works great – easily cools room to 70- degrees and is much quieter than the roll around portable at a cost of only $250!

-- Jim

7 comments so far

View michelletwo's profile


2233 posts in 1649 days

#1 posted 418 days ago


-- We call the destruction of replaceable human made items vandalism, while the destruction of irreplaceable natural resources is called development.

View jeffswildwood's profile


412 posts in 611 days

#2 posted 418 days ago

Jim, I wish I had seen this about 2 weeks ago. I had someone want a block to keep her cat from escaping from the pull out sides of the A/C. The cat had dug through the vinyl. I did a fitted plywood wrap that worked but this is far more creative. With a little dress up on my part she would also have a place to put decoration items. Nice work and creativity!

View Shawn Masterson's profile

Shawn Masterson

1253 posts in 582 days

#3 posted 418 days ago

great way to say screw the HOA. HOA is the reason I will never live in town again.

View DeputyMike's profile


69 posts in 1779 days

#4 posted 417 days ago

Jim, I have been brainstorming lately about what to do for A/C in my shop (not TX heat, but Central NC heat/humidity is rough too!). Is your garage a 2-car garage? Do you run it all the time or just turn it on when you know you are headed out to work soon? Thanks!

View Jim's profile


42 posts in 2543 days

#5 posted 416 days ago

Mike – shop is in second story over the garage but size is about like a 2-car garage (22×22). I only turn the a/c a short time before I head out to play; typically takes 45-60 minutes to cool it to 72 degrees with outside temps in mid-90s. 12K BTU Frigidaire A/C unit for $320 at Lowe’s with a $100 local utility credit so it was cheap AND effective. The roll-around portable was a 14K BTU Haier that was never able to get temp more than 15 degrees below ambient running full blast for hours – I would definitely recommend the window version…quieter, colder, cheaper…just make sure you have a HD or Lowe’s bucket under the condensation drain – in the humidity of NC you’ll be amazed how much moisture the unit will draw out of the air while it cools!

-- Jim

View Roque's profile


65 posts in 895 days

#6 posted 414 days ago

What a great solution to the problem. Nice work.

View Mark Shymanski's profile

Mark Shymanski

5100 posts in 2346 days

#7 posted 393 days ago

Man’ I’m sweating bullets in my shop at 20ish degrees, your cooling your shop down to that level….I can’t imagine:-) What would the outside temps be?

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

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