venting portable AC thru hinged window with fabric screen

How To Vent A Portable Air Conditioner Through A Casement Window

Air conditioners are lifesaving machines that cool us from the scorching summer heat. They keep us rejuvenated and active even is temperatures are above 40°C. As days pass by, air conditioners are becoming smaller in design.

The smaller ones are easier to transport around the house. Instead of window ACs nowadays people prefer portable ones with an exhaust hose and vent.

Starting from offices to schools, and restaurants, portable ACs are everywhere. If you want to opt for a portable air conditioner, but you have casement windows at home, do not worry! In this article, we will discuss all the ways how to vent a portable air conditioner through a casement window.

Is Venting Your Portable AC Through Your Casement Window Difficult?

If you have never vented your air conditioner through a window before then it might be a little tough for you. However, if you have previously seen someone vent AC on your window this should be easy.

In comparison to venting portable AC through a sliding window, push-out windows are tougher. As push-out windows act like doors and open on the vertical axis.

To vent ACs through your push-out window you will need to remove and reattach your entire window frame. Then you will have to add a layer of clear plastic or polycarbonate to your window.

These are the two most important tasks! After adding a layer of plastic or polycarbonate to your casement window the rest of the steps are very easy. All you need to do is attached your AC vent kit to your window.

Even though most types of portable ACs come with a window kit, however, you can use any insert of your preference. We would suggest you opt for Plexiglass. These are great for keeping hot air out of your room and helps circulates cold air inside.

Reasons for Using Plexiglass

Plexiglass is similar to plastic but stronger. It is also stronger and more resistant than normal glass. The best thing about plexiglass is that it is shatter-resistant. Even if strong winds act on it, or your push-out windows hit, it won’t break. Plexiglass is very reliable and easy to use in terms of installation and handling.

How to Vent a Portable Air Conditioner through a Casement Window

There are 2 methods of how you can vent a portable air conditioner in your push-out window.

1. First Method

If you want to opt for a top-notch installation of your portable air conditioner, you should try this way. It is known as the plexiglass method.

Items that you will need:

  • Plexiglass
  • Caulk
  • Drill
  • Screws


  1. First of all, you need to measure the size of your window with a measuring tape. Find out its length and width. This is because you will need to find the plexiglass of the same size. You can go to any hardware store and ask for plexiglass to be cut in your preferred dimensions. If you have plexiglass at home, you can cut it yourself.
  2. To cut your plexiglass, you will need a jigsaw with fine blades. You need to cut a hole in the plexiglass to fit your exhaust house in it.
  3. It would be better if you let professionals cut it as the hole needs to be of the correct size to fit the hose properly.
  4. After you are done cutting your Plexiglass you can start installing. Open your push-out window and attach a strong latch to your window and the frame. This is done so that they don’t blow away too far as the PAC will be running. This will also ensure your push-out window stays secured during any external weather damages.
  5. Take your portable air conditioner near your casement window. Keep it at least 5 to 6 feet away from the window. If you don’t have an electric outlet near you need to use an extensible plug.
  6. Next, connect the flexible hoses to the outlet behind your portable air conditioner.
  7. Your plexiglass might have an extra screen, you need to remove it if it has any then place the plexiglass in your window frame. To firmly adjust the plexiglass you need to drill holes.
  8. After you are done installing the plexiglass to your window frame, attach the exhaust hose to your Plexiglass.
  9. Insert each hose end inside your window’s exhaust and insert them in the window panel’s opening. Make sure to carefully push them down and the vent opening is near to your window frame’s bottom.

2. Fabric Screen Method

If you think the first method is tough for you check the second one. This method involves Velcro strips instead of plexiglass. This method is cost-effective and much easier. It also takes much less time than the first. However, in terms of efficiency and sustainability the first method wins.

Items that you will need

  • Fabric seal kit
  • Velcro Strips
  • Zip Ties


  1. First of all, you need to get Velcro strips and attach it to your window’s frame.
  2. Clean your window frame properly, before attaching the Velcro strips.
  3. Check the Velcro strips to find to widest fabric point on the seal, keep that far away. Make sure to always attach the narrow portion to the frame. The zipper should also be facing inside.
  4. Cover the fabric around the window frame. Make sure to fold the Velcro strips in a way so that it makes a 90-degree angle. Try not to keep any extra left-overs. Tuck it inside to make it look tidy and clean.
  5. Now, you need to open your window as well as the zipper.
  6. Bring your air conditioner and keep it near. Take its hose and stick out the hose vent through the zipper hole. Close it properly so that it stays in place. That’s it you are all good to go.

Bottom Line

Now that you have read this article, you should know how to vent your air conditioner through your push-out window. You can try any of the methods, however, we suggest you try the first method. Plexiglass can be expensive but provides better stability than Velcro strips. Now, you will not need professional help to vent your AC, you can do it yourself.

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