Window A/C box

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Project by Jim posted 07-06-2013 09:50 PM 1823 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


2783 posts in 3573 days

#1 posted 07-07-2013 10:12 AM


View jeffswildwood's profile


4184 posts in 2534 days

#2 posted 07-07-2013 12:19 PM

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!

-- We all make mistakes, the trick is to fix it in a way that says "I meant to do that".

View Shawn Masterson's profile

Shawn Masterson

1325 posts in 2506 days

#3 posted 07-07-2013 08:41 PM

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 3702 days

#4 posted 07-09-2013 02:57 AM

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


43 posts in 4466 days

#5 posted 07-09-2013 01:04 PM

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 2818 days

#6 posted 07-11-2013 01:06 PM

What a great solution to the problem. Nice work.

View Mark Shymanski's profile

Mark Shymanski

5623 posts in 4270 days

#7 posted 08-02-2013 01:34 AM

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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