How to Install an Air Conditioner

In the middle of the summer you could probably be convinced that just about the best invention anyone has ever come up with is an air conditioner. However, after you've bought the unit and lugged it home you still need to install it before you can enjoy that beautiful cool air. Good news, it's straightforward and simple.

Difficulty: Easy

Instructions

Things You'll Need:

• Caulking gun and waterproof caulk
• Measuring tape and pencil
• Air conditioner, mounting hardware, foam insulation (usually provided by manufacturer)
• Screwdriver and screws

1. Measure the area you want to cool and calculate the size of the air conditioner you will need. (See below)

2. Determine where you want to install the air conditioner and measure the window opening. The air conditioner you buy needs to fit into the opening and all air conditioners aren't the same size.

3. Install the mounting brackets that came with the air conditioner unit (be sure to follow the manufacturer's directions).

4. Slide the air conditioner into the window opening and attach it to the mounting brackets (again as per manufacturer's instructions).

5. Lower the window down onto the top of the unit.

6. Pull out the extensions on each side of the air conditioner and attach them to the window frame.

7. Use a piece of foam (may be provided by the manufacturer), seal between the top of the air conditioner unit and the window.

8. Attach the drainage hose (if supplied) to the outside of the air conditioner.

9. Caulk around the outside of the unit to help keep the warm air outside.

10. Plug in your air conditioner, turn it on and enjoy that cool air.

Tips & Warnings

• If you have an option, install your air conditioner in either a North-facing (best) or South-facing (next best) wall. Both East-facing and West-facing walls get direct sunshine so the unit has to work harder.
• Air conditioners are rated by their British Thermal Unit capacity (BTU). A rule of thumb is that a 12,000 BTU unit will cool 500 square feet of room.
• Air conditioners are also rated by their Energy Efficiency Rating (EER). A higher EER is better since it uses less electricity. Most air conditioners are rated between 8.0 and 10.5.
• Be sure to follow the manufacturer's directions for installing both the mounting brackets and the unit itself. Air conditioners are heavy and improperly installed brackets could allow the unit to fall.

[kated2009]

on 8/10/2009 Excellent tips - especially for this time of year!

[totoce]

on 8/9/2009 how to compute size and no. of diffusers from a 500mm x 300mm air duct supply

[cntrline]

on 8/4/2009 Very fine article. Just one comment: Most window units are meant to be slid out of their housings before being installed. This is to allow the installer to mount only the lightweight housing in the window first, and then just slide the heavy unit in.

[Andy]

on 5/28/2009 I don’t think I’ve ever seen a window screen that you couldn’t remove, but if that’s the case with your window you still do have a couple of options.Free standing air conditioners are available that are essentially window air conditioners on wheels. You just plug them in and they can be moved from room to room. Check at home or hardware store or even a department store.You could also get a freestanding dehumidifier that would take the moisture out of the air and combine it with a fan to move the air.

[canadaglen]

on 5/27/2009 HELP! My room is an oven in the warm months, but my window has a screen built in, which makes installing a much-needed air-conditioner seem impossible. Suggestions and non-destructive solutions would be most welcome! Thanks. Glen - Toronto, ON