Can You Vent A Portable Air Conditioner Into Another Room?

Portable air conditioners function in a way that’s similar to regular air conditioners. You need to vent these too. Otherwise, the hot air flowing out of the conditioner will end up in your room, neutralizing the effect of the cold air.

However, there seems to be a lot of confusion among people about this. Should you vent the air conditioner into another room? Is it okay if you vent it into your garage? The internet is swarming with such questions, but there aren’t many answers.

Today, we’re going to answer all of these by sharing the top venting methods. So, let’s get started!

How to Vent A Portable Air Conditioner Into Another Room?

Here are some of the best ways of venting a portable air conditioner into another room.

Read more: Can You Vent a Portable Air Conditioner Through A Screen?

Through Ceiling

Most portable air conditioners come with a tube that helps in the venting process. If you have a long exhaust tube, then this will be very favorable for you. Even if you don’t, you can always make an extension that’ll help you in this process.

To do this, you’ll need a false ceiling as well. Remove a tile from the false ceiling, run the tube from one room and route it to another. If you want to create absolute isolation, then you can cut that specific tile so it sits around the tube tightly.

This is indeed a great way of venting portable air conditioners into another room. It will help you route the exhaust tube a long way without disrupting the basic aesthetics of the indoors, and it’ll get the job done properly as well.

The only drawback with this is that you’ll need a false ceiling to do this.

Through Wall

If you don’t find a permanent hole in the wall between two rooms, then you may try this method. However, remember that this isn’t a DIY method, and you’ll need to hire a professional to get this done.

In this method, you’ll have to create a considerable size of the hole in the wall that’s joining the room the AC will be in, and the one that’ll serve as a dump. Once the hole is dug out, you need to channel the exhaust tube through that hole, into the other room, and plaster the excess area surrounding the tube.

This will create good isolation, and it’ll help you vent a portable AC thru the wall into the next room. However, there are certain drawbacks to it. If the wall isn’t well isolated, then chances are that the warmth and the moisture will flow back into your room. Then again, you’ll need to go to great extents to hide the tube in the other room.

Read more: How To Vent A Portable Air Conditioner Through A Wall

Should You Vent a Portable Air Conditioner into Another Room?

Well, there are several ways in which you can vent a portable AC into another room. But the main question is, “Should you do it?” To answer that, we need to consider two issues.


You can vent a portable AC to the next room through certain methods. However, most rooms aren’t built with proper heat isolation, and if you’re venting warm air to the next room and filling up the room with cold air, chances are huge that some of that warm air will seep back into the room you want to condition.

This will create a situation where the AC will have to work against itself, and it definitely will minimize the efficiency of your AC. Thus, at the end of the day, you’ll find that your AC needs to work longer and harder to keep your room at the determined temperature.


Another major problem is moisture. Air coolers not only remove heat from one space and dump it into another, but it does the same with moisture as well. When you’re venting a portable air conditioner into another room, it will take a considerable amount of moisture from one room and dump it into the one it’s being vented to.

This in turn will double the moisture of the room that’s serving as the dump, and it’s going to cause mold problems.

Can You Vent A Portable Air Conditioner Into The Garage?

Yes, you can certainly vent a portable air conditioner into the garage if you want to, but should you?

Like any other room in the home, the wall of the garage isn’t well isolated either. So, the things that you would experience if you had vented a portable air conditioner into another room, you’d experience the same if you’d vent the AC into the garage.

This is why we don’t recommend venting a portable AC into the garage at all.

Read more: How to Install Portable Air Conditioner in Sliding Door?


As you can see, there are multiple ways of venting a portable air conditioner into the garage. However, we don’t recommend doing this at all because it puts your entire home in a risky position. It will make your home warmer and it’ll also increase mold growth. So, we highly discourage this.

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