# Casement Window Air Conditioner Installation?

**URL:** <https://boards.straightdope.com/t/casement-window-air-conditioner-installation/347971>\
**Category:** Factual Questions\
**Created:** [March 11, 2006, 9:01pm UTC](https://boards.straightdope.com/t/casement-window-air-conditioner-installation/347971 "2006-03-11T21:01:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![FlyingCowOfDoom](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/flyingcowofdoom/32/21776_2.png) [@FlyingCowOfDoom](https://boards.straightdope.com/u/FlyingCowOfDoom)\
**Post date:** [March 11, 2006, 9:01pm UTC](https://boards.straightdope.com/t/casement-window-air-conditioner-installation/347971/1 "2006-03-11T21:01:57Z")

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Hi everyone. I want to put a window A/C unit in my bedroom, but I only have casement windows in the room. Two are 24x44 and one is 33x44. Does anyone have any experience installing a casement window unit? Is it something I can do myself? I have installed several normal window A/C units (double-hung windows).

TIA!

–Chris

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**Author:** ![MikeG](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/mikeg/32/4329_2.png) [@MikeG](https://boards.straightdope.com/u/MikeG)\
**Post date:** [March 11, 2006, 9:20pm UTC](https://boards.straightdope.com/t/casement-window-air-conditioner-installation/347971/2 "2006-03-11T21:20:37Z")

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There are specially sized casement air conditioners available. They aren’t cheap but they install just like you would in a double hung wondow opening, just with more to seal off above.

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**Author:** ![kanicbird](https://avatars.discourse-cdn.com/v4/letter/k/5f8ce5/32.png) [@kanicbird](https://boards.straightdope.com/u/kanicbird)\
**Post date:** [March 11, 2006, 11:13pm UTC](https://boards.straightdope.com/t/casement-window-air-conditioner-installation/347971/3 "2006-03-11T23:13:04Z")

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I put a standard a/c in such a window. I did this by removing the window (1 clip and 2 screws IIRC) and sealed off the top w/ a piece of plywood.

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**Author:** ![robby](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/robby/32/11048_2.png) [@robby](https://boards.straightdope.com/u/robby)\
**Post date:** [March 12, 2006, 4:25am UTC](https://boards.straightdope.com/t/casement-window-air-conditioner-installation/347971/4 "2006-03-12T04:25:48Z")

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Back when we lived in Navy housing, I put a standard A/C unit into a casement window without removing the window. I filled the open section on top with a piece of plywood screwed into place with corner braces and mending plates like [these](http://www.stanleyhardware.com/default.asp?TYPE=CATEGORY&CATEGORY=HDW+REINFORCEMENT). The piece of plywood was in securely enough that it easily held the A/C unit in place. I even painted the plywood so it blended in with the wall.

The A/C units designed for casement windows, in my experience, are much more expensive than standard units.