Wall Mounted Air Conditioner vs Through the Wall Air Conditioner

If your in the market for a new air conditioner but you don’t want your window blocked by a huge metal unit, you have two options: wall mounted air conditioners and through the wall air conditioners. Each comes with its own set of advantages and disadvantages, so you'll have to consider pros and cons before deciding which one will best suit your needs.

Through the Wall Air Conditioners

This air conditioner type requires a hole through your wall in order to fit in, so the installation is not quite easy. A good position for the hole is required for the air conditioner to be able to provide air flow for the entire room. Also, when picking the location you’ll have to make sure it won’t cross in-wall plumbing or electrical wiring.

Once you have the hole done, a sleeve is inserted to properly hold the air conditioner unit in place. After it's set, insulation around the sleeve and in some cases around the air conditioner unit itself is required.


  • No ducts and joints, just fit into place and go
  • Can be fitted even into smaller vacation homes


  • It requires you to dig a hole in the wall of your house
  • The installation is hard and requires a lot of work
  • If not well insulated, will allow wind to blow inside your house
  • Once installed, it cannot be moved

Wall Mounted Air Conditioners

Wall mounted air conditioners are more comfortable to install, but caution is necessary. The main unit is mounted on the outside of the house, onto the exterior wall. You’ll have to make sure the wall is resistant enough to hold the unit, otherwise the result won’t be a pleasant one. Once the main unit is in place, mount the indoor unit where you want it and, using a duct system, connect the two together. It only requires a small hole through your wall to get the duct system from the inside unit to the outdoor unit. Keep in mind that regular maintenance is required because leaks can appear and affect the good functioning of your system.


  • Easier to install than a through wall system
  • Requires only a small hole through your wall, compared to the other type where you have to pull half your wall out
  • The inside unit can be moved with few modifications needed to be done to the entire system


  • Because of the weight of the outside unit, it cannot be mounted on less resistant walls, such as small wooden houses
  • Because of using a duct system, leaks may occur
  • Advanced maintenance required

All the facts presented above should help you pretty much get an idea of which system would fit your home better. Their main role is the same, so based on the advantages and disadvantages of each type it’s up to you to choose the one that’s right for you.