Messages and Online Forum Q&A

Re: Installing air conditioner in exterior wall

From: info@builderswebsource.com
Category: HVAC
Remote Name: 63.198.181.43
Date: 03 Jun 2001
Time: 12:06 PM

Comments

Depending on the size of the air conditioning unit, you must first determine whether it will fit between existing studs (which are typically on 16" centers, leaving about 14.5" clear space between the studs). If this is the case, your job will be somewhat easier as you will not be impacting the structural load-bearing capacity of your exterior wall.

However, if the unit is wider than what will fit between the studs, you'll have to cut open the wall from the inside to install a header, as well as supports for the studs -- much in the same way you would build an opening for a window.

Alternatively, if you have sufficient existing windows in your room to still meet building code requirements for natural light and ventilation, you could use a spare opening for your air conditioning unit. DO NOT use an egress window, which is required for fire safety reasons.

If you are uncertain about how to frame an opening such as what we've described, we recommend that you hire a local contractor to do the job for you. Depending on your exterior surface (stucco, masonry, wood siding, etc.), you may find it challenging to achieve a water-tight seal as well as proper aesthetic appearance.

Additional directions are probably available from the manufacturer of your unit. Be sure to allow for any drainage that may be required as well as enough electrical power to support the unit. Some may require a dedicated circuit, which will require an electrician as well.

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