Buying an air conditioner for a window that opens side-to-side is not difficult as units are built specifically for this.
Air conditioners that are built to fit into a window that slides side-to-side are caller Slider or Casement A/C units.
While not casement style window air conditioners are not as numerous as standard units, there are units available with some of our favorite picks below.
As always be sure to read the reviews on Amazon or elsewhere to be sure a unit is a good fit for you.
*This post contains affiliate links.
Our Picks for Best Window Air Conditioners for Sliding Windows
- Perfect Aire Casement 10000
- Frigidaire FFRS0833Q1
- Koldfront CAC8000W
- Global Industrial Casement
PerfectAire 10,000 BTU Slider Air Conditioner Window A/C – Casement, 10000, Gray
Perfect Aire makes this popular slider window air conditioner.
It is a 10,000 BTU unit which is large compared for a window A/C unit.
There is three speeds along with a fan only mode.
The unit is rated to cool a space up-to 450 SQ Ft.
Frigidaire FFRS0833Q1 8,000 BTU 115V Slider/Casement Room Air Conditioner with Full-Function Remote Control
The Frigidaire FFRS0833Q1 is an A/C unit built specifically for slider windows.
It is an 8000 BTU unit and uses 115 Volt wall outlet for power.
250 Square feet of space can be cooled and it also comes with a remote control.
The measurement are 23.5 x 14.5 x 20.2 inches and it weighs roughly 71 pounds.
Koldfront CAC8000W 8000 BTU 115V Casement Air Conditioner with Dehumidifier and Remote Control
This slider window unit from Koldfront is a 8,000 BTU unit.
The dimensions are 15-1/2″ to 16-1/4″ wide with a minimum height of 20-5/16″ inches
The EER energy rating is 11 and it can cool a space up-to 350 square feet.
Global Industrial Casement Window Air Conditioner 10, 000 BTU 115V with Remote
This slider A/C window unit is 10,000 BTU rated to cool a space up-to 450 square feet.
It has multiple fan settings and 4 way directional air that blows out in the direction needed.
The above are a few examples of window A/C unit that can fit into a window that slides side-to-side or a vertical window that is narrow and tall.
The two main things to keep in mind when buying any window air conditioner unit is the dimensions and the power needed.
Be sure to measure the window the unit will be placed in to be sure it can fit and match them to the units size.
Also the correct power outlet needs to be provided or the unit can not work. While most are 115 volts some come larger A/C packages come with 220 volts which is not a common wall outlet.
220 volt units can provide more cooling capacity but will need a power line to run it. A 220 volt line can be run to a unit but will cost more money if one does not already exist. Most 220 volt outlets in a home are set up for an electric water heater or electric clothes drier.
Keep in mind there are other options to cool a room such as a Mini Split A/C unit or a portable system which are popular.
Portable units and mini split units often cost more but do have their benefits over a standard window Air conditioning unit.
For example, a portable unit can be moved to any room and use a large hose to pump out hot air from a room. This makes them more versatile and easy to setup.
A mini split unit is built to last a long time and fit into a home nicely by not taking up much space. They are more quiet also since the main components are located away from a home.