The installation of window AC units depends on the type of window.
Almost all models are designed for double-hung windows that have vertical window sliders.
The sliding pane sits behind the bracket and provides a secure brace to prevent the AC from falling out of the window. Most AC units also come with expanding baffle wing curtains that make it easy to fill up the gaps on either side of the model.
The installation itself is quite easy and simple. Generally, most window sills support the AC and don’t require you to make any changes. Still, installation kits come with brackets or include tips to add bracing if your storm window keeps the AC from sitting well.
Then, you just need to make sure that the included foam sealing is in place and attach the wings to fill the gaps.
Next comes the hardest part: hosting the AC in place, and it’s better if you have a helping hand. Rest the AC in the frame and ask a helper to steady it. Then, slide the inside window sash in its place to secure the air conditioner.
After that, you only need to add stop-braces to ensure no one accidentally opens the window. Finally, use tape and insulating panels to close any remaining gaps so that the cold air doesn’t escape the room.
In the case of a horizontal sliding window, you need a shelf or a brace against your exterior wall to secure the unit.
Installing an air conditioner on a casement window is the trickiest part, even though AC models designed for horizontal slides are usually also designed for casement windows.
For detailed installation instructions, make sure you check out the unit’s user manual.