How To Install A Window Air Conditioner In Window or Wall: DIY Tips

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If you don’t know anything about the installation of an air conditioner in your window or wall then this requires more than a day.

But if you are an office person then you don’t have enough time for it. Then choosing the window air conditioner for your room is a great thing because it has only a single unit.

According to the report of Foot Hold America, on average the US employee receives only 10 paid holidays each year and the unpaid are various.

So you are not alone, many people also may be facing this same problem. If they didn’t install their air conditioner before starting the summer season.

But if you have lots of work to complete on Saturday and Sunday. Then you need to take a paid leave from your office and you have only a single day to complete this work.

That’s why you need to read this complete article. Because in this article I explained the step-by-step process to install a window air conditioner in a window or wall .

So that you can complete your work within the timeframe.

Don’t worry I have separately explained about the both installation window and the wall.

So you will not be confused. Also, I have included the required tools that are going to be needed while working on it.

But don’t skip any point or paragraph otherwise you will lose your chance to install your air conditioner in a single day.

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Tools Are Required For Installing Window Air Conditioner

Do you know what tools you need to use to install your window air conditioner? Before starting the installation process, keeping them all in one place will help you to find them easily. But what are those tools? Great question!!!!.

• Screwdriver
• Brush
• Cutter
• Driller
• Measuring Tape
• Nuts & Bolts
• L Brackets
• Sealant

That’s all now you are ready to install your window air conditioner whether inside the window or wall.

These tools and materials are used in both installations. But now it’s time to install your air conditioner in the window.

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How To Install A Window Air Conditioner In Window: Step By Step Guide

Installing the air conditioner in a window instead of the wall is quite easy. But this requires a step-by-step process to follow.

That’s why you need to read below to understand it properly.

1. Remove Your Old Air Conditioner

Having an air conditioner installed in your house is a great thing. Because now you have some experience on how to deal with it.

But if it is outdated or does not work properly then first you need to remove it from your window.

So that you can start the installation procedure for another better air conditioner.

Don’t worry, the removable process of an air conditioner is easier than installation. All you need is to shut off your air conditioner first.

Then open the window carefully and take out the complete unit. Lastly, you need to dis-attach the side panels from your air conditioner.

That’s all you have successfully removed from your old air conditioner. But make sure to wear protective stuff like gloves, goggles, and mask.

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2. Find The Center In Your Window

Do you have the proper space in your window to install an air conditioner? Where is the center in it? This is important to find because installing an air conditioner on only one side makes things worse.

Because side panels that you have attached with your air conditioner also require some area to reach the window frame evenly.

But if the side panels don’t close properly then you leave any space. That becomes the cause of passing the air.

Overall, this will reduce the efficiency of your window air conditioner.

That’s why you need to have a pencil and a measuring tape to mark down the center of the window. This will help you to install your air conditioner.

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3. Prepare The Window For Installation

Have you checked your window? How old is your window frame? As you know air conditioners are very heavy. So if your window is not strong enough.

Then your air conditioner may fall down which requires more investment. That’s why before installing your window air conditioner.

You need to check your window frame. Also, if you have weatherstripping then you should install it in your window.

So that all the tiny cracks and gaps will be blocked. Because these tiny spaces let the air pass through from them.

Also, when you try to install and remove your air conditioner this strip will protect it from any possible damage.

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4. Attach The Side Panels With AC

Are your side panels adjustable? As you know, making a perfect space for an air conditioner in the window frame is not possible.

Because there are several sizes and weights of air conditioners in the market.

So when you want to change it then you also need to adjust your complete window frame.

That requires too much effort. That’s why you need to have adjustable side panels attached to your air conditioner.

So right now you have 1.5 tons of AC. If you want 2 tons of AC you can easily install it.

All you need is just to attach these panels to an appropriate place on your air conditioner.

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5. Insert The Complete AC Unit In The Window

Usually, air conditioners are very heavy so it is great to have an extra pair of hands. This will help you to prevent any major damage to your new air conditioner.

So first let’s start with picking up the air conditioner in your hands and another person should secure the window.

Then close the window tightly on the top of the window.

But make sure not to leave it until the process is successfully completed. Because most of the part of your air conditioner is outside that’s why maybe it slipped from your hands.

Then you need to invest some money to fix it. But don’t worry this will not happen if you are careful when doing this.

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6. Lock Down The Window

Do you know about the L bracket? How and where do you need to use it? So the L bracket is some kind of lock that installs on the top of the open window.

This will prevent the window from being pushed by anyone. So that you will don’t need to take tension for the damage of your air conditioner.

Usually, these brackets come with your window air conditioner.

But if not then I highly suggest you install it right away if you haven’t done so. This will easily be available at any home improvement store.

You need to have at least two brackets to install both sides. So when you get them carefully, install them on one side and then another by using a screwdriver.

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7. Attach The Side Panels With The Window Frame

So you have secured your window frame but this doesn’t mean the complete unit is completely secured.

Because the side panels are left and if they are adjustable then these are not so strong. That’s why if you don’t attach it with the window frame.

Then your air conditioner is always in danger.

So you also need to attach the side panels with the window frame. So that a stronger and better unit can be built that can hold the weight of your window air conditioner.

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8. More Secure The Air Conditioner

The air conditioner is one of the major investments in your house. So if it gets damaged in any way then this will cost you more.

That’s why it is great to have an extra level of security. Most types of window air conditioners also come with some brackets.

That you can use to connect it with the interior window sill.

So if you also get some then you should also install it in your air conditioner by using some screws and a screwdriver.

When you find the place for nailing them then carefully complete this work.

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8. Check Everything Is Correct

Congratulations you have successfully complete this work. But is your air conditioner properly installed or needs some adjustment? So after installing your window air conditioner in the window you need to check it carefully.

This will help you to remove any kind of tension and prevent anything wrong with your air conditioner.

So these are the proper steps to install your window air conditioner in the window. If you also want to do the same then you should follow all the steps properly.

But what about installing an air conditioner inside the wall? If you want this then you need to read below.

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Install A Window Air Conditioner In A Wall

It is not necessary to have a window for installing your window air conditioner. If you don’t have a window in the right direction and the right place.

Or if you don’t want to install your air conditioner in the window. Then you can easily install it inside the wall by following these steps.

1. Clean The Wall & Get The Size Of Your AC

Where do you want to install your air conditioner in your house? What is the exact size of your air conditioner? So wherever you want to install your AC you need to clean the surface properly.

You can use any clean cloth for this work. This will help you to complete the next step. Then you need to take the exact size of your air conditioner.

You can use any measuring tape for this work because this will easily be available in your house.

But make sure it should be correct because making a bigger hole on the wall, again and again, will damage your complete wall.

That’s why after taking the size I recommend you to note it down in any notebook.

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2. Build A Jamb Box & Cut The Exact Size On Your Wall

Depending on the size of your window air conditioner you need to build a jamb box for it. This will provide better circulation around the air conditioner.

But it should be larger than your AC and strong enough. So that it can handle it and your AC can fit inside of it.

That’s why the jamb box should be made with pine wood and about 4 inches thick from all around.

So when you successfully build it then you need to place it where you want to install your air conditioner. Then make some outlines around it to cut.

So after completing this work now this time to cut the wall and you need to do this carefully. Then you will find insulation under the wall if you have installed it.

You need to cut it also to make a proper space inside the wall.

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3. Install The Jamb Box Inside The Wall & Secure It

So now you cut the exact size for installing the jamb box inside the wall. Then you need to check if the jamb box easily fits inside the space or if it requires some adjustment.

You need to do anything if required. Then carefully slide down the jab box inside the wall. So when you check everything is well.

Then after you need to nail it up properly and it should be all around. 

It should be on both sides, interior or exterior because you have only insulation between them. I know the jamb box will not properly fit inside the space.

That’s why you need to do some adjustments like adding some pieces of plywood. 

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4. Insert Your Window Air Conditioner Inside The Jamb Box

Now you need to cut a piece of plywood according to the size of your air conditioner which you noted down earlier.

Because you can’t install your window air conditioner directly into the jamb box. So first you need to build an interior stop and then install the piece of plywood into it.

This will tightly hold the plywood and it will hold your AC.

So when you complete this process now you are ready to insert your window air conditioner inside of it. Make sure it should be tight enough.

Then carefully check the structure and use some sealant around it for next-level protection. 

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Wrap Up On How To Install A Window Air Conditioner

Installing the window air conditioner whether inside the wall or window you need to follow the proper steps if you don’t know anything about it.

Because this is one of the highest investments in your house and if it gets damaged anyway. Then it requires some investment to fix it.

However, both installations somehow connected with each other. 

But also they have some different ways like locking up the window and other things.

That’s why I have covered both installations separately so that you can understand them easily.

But if you have an extra pair of hands then this will be working as a plus point for you and your work will finish very fast. 

Also, this will decrease the risk while fixing your air conditioner inside the wall or window.

But keeping all the tools and materials near to your working place is a great idea.

Because finding them again and again without completing the work makes things worse.

That’s why I have already listed all the tools that you may need while installing your window air conditioner in a window or wall.

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FAQ: How To Install A Window Air Conditioner In Window or Wall

Installing a window air conditioner inside the wall and window is difficult. That’s why many people like you have so many questions. That’s why I have added them in this article to provide appropriate answers.