I am looking to install a through the wall air conditioner in the basement. I don't want to block the one window. There is already a window in the brick. I don't know if there is any kind of structural issue with cutting and framing in the air conditioner.

Here is the air conditioner sleeve. LG AXSVA1

Interior location for A/C Exterior location for A/C Approximate location in red dashes.

  • Are You gonna cut all the rectangular shape out? I mean, get rid all the bricks and You are asking if this is ok? If not, what are the desired hole dimensions? And where? Aug 9, 2015 at 21:45
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    Related; keyword lintel: Making window in concrete foundation
    – Mazura
    Aug 9, 2015 at 22:00
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    Serious structural issues. You need an architect or engineer to review.
    – bib
    Aug 9, 2015 at 22:04
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    You sound reasonable, Ed! The reference by @Mazura to cutting a groove part-way through to insert a steal lintel, then finishing the groove from the other side to finish inserting the lintel, then cutting the hole underneath narrower than the lintel probably is real similar to what will happen in practice. Aug 9, 2015 at 23:46
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    This is a perfect application for a mini-split AC unit. That would allow you to install the AC exactly where you want it, and just drill a small hole through the wall to connect the two parts. Aug 14, 2015 at 3:27

2 Answers 2


Cutting a hole in your foundation almost always requires an engineer, and is almost never a do-it-yourself project.

You'll need an engineer, to tell you how to carry the load around the opening. And you'll likely need tools and knowledge you don't have, to actually cut the hole.

  • +1 Totally agree. This must be done with accordance to codes and with all needed structure computation. The problem is same as for inserting a window into a wall. You also need a large hole here after all. Aug 10, 2015 at 16:22

Comment from:
What should I consider when cutting/making a window in a concrete foundation?

I wouldn't do this without an L shaped metal lintel on the inside to support the load above and also prevent crack/total failure of the veneer. My only thought would be to cut the hole for the window then immediately move to the interior of the home and cut a groove on the inside of this new window so that lintel can slide into the groove and support the very top of the window. The bottom of the window should be sloped outward as well to prevent rain from puddling outside the window too. – TugboatCaptain

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