Window AC Installation & How To Do It Yourself

Are you thinking of performing Air Conditioner Installation Services yourself?

If you are thinking of performing AC installation services for your new window air conditioning unit to do the cooling duties for your house or apartment, then you surely need to know the best ways to install your new cooling system to avoid having to scramble to find phone numbers to hire an HVAC contractor to do it for you. 

That is why I have prepared the following article for you.  I wanted to provide for you the most simple and easy to follow steps to take so that you can successfully install your new window central air conditioner unit all by yourself and save a little bit of money as well.

This discussion takes you through a step by step guide on how to properly have your window air conditioner unit installed by no know one other than yourself as well as give you some suggestions and recommendations regarding the 5 best window HVAC systems to buy today.

For additional tips on how to install a window AC unit, please be sure to watch the following video:

Before we dive into the best steps to take to properly install your new window heating and air unit, let’s first take a look to properly prepare for the HVAC installation job you are about to perform.

Properly Prepare For New Window HVAC Installation Unit

Right before you begin, you need to select a window that is close enough to an outlet as well to help you determine the size of the AC unit you need to purchase. Most window air conditioners usually have power cords that range between 5 to 6 feet in length. Look on the side of the air conditioner that the cord extends from and then chose an outlet the cord reaches. 

It is also important to have your owner’s manual out which will help you follow along with the manufacturer’s directions that have been provided.

To do this, you surely require some tools to work with. They include the following:

  • Measuring Tape
  • A Pair of Scissors Depending on the Brand or Model
  • Screwdriver
  • Screws and Brackets
  • Step Ladder (depending on the height of window)
  • Gloves for Better Grip

Having found and gathered the tools you need, you can now start to execute the steps required to successfully install your new HVAC system all by yourself. The best steps to follow to successfully install your new window heating and cooling system all by yourself are as follows.

How To Install Window Air Handler Type Of Systems By Yourself

1.  Remove Air Conditioner From Box & Measure Window 

The golden tip here is to ensure that you are very careful when you are removing your unit from the box. The back of this HVAC unit is usually very sharp.

Carefully remove all the pieces from the box and ensure that all the parts required to assemble the unit are available. The next thing you need to do is measure the length your window has and then ensure you mark it using a pencil. 

Ensuring that you mark it will help you in ensuring that the installation activity becomes a little easy. Another thing is ensuring that your air conditioner unit panels are evenly reaching both sides of your window.

2. Prepare Window Properly For Installation

What you need to do is open your window. If the manufacturer has provided you with a strip, you will be required to install it right away. These strips usually help in blocking any sort of air that may be passing through the tiny cracks and also protects your window from any possible damage when you are in the action of removing or installing your air conditioner.

What you need to know is that not all window AC models will have these weather strips but still, your air conditioner will be able to work fine even without one.

3. Attach the Side Panels

Window AC side panels attachment

What you need to do is slide the panels into the appropriate place on your unit. Then go ahead and slide them all the way in and then secure the panels that are adjustable into your window air conditioner using the screws that you have been provided with. 

After you have completed attaching the side panels successfully, the next thing you need to do is to connect all the screws to be able to avoid any sort of gaps that may be letting in warm air, pollution, and allergens into your house or apartment.

4. Insert Air Conditioning Unit Into Window

One major tip about this is that you require a helping hand here and two people will do a good job in this step. Even if you feel like you can manage this step on your own it would be of great benefit to working on this step as two people because the extra two hands are helpful especially in closing the window and in securing the air conditioner.

Since most of the unit’s weight normally falls outside and therefore you need to be extra careful when lifting it in place. This is where the extra set of hands also comes in handy. The moment you close your window, your air conditioner will be totally secure.

5. The Next Step Is To Install the L Brackets

This usually follows after the hard part is done. The rest that follows is simply securing everything and doing some finish-ups. The type of installations here usually varies at this stage based on the manufacturer’s specifications, although most of the models available usually have at least one L bracket which helps in holding the window securely in one place.

What you need to do is to properly screw the L bracket on the very top of your window that you have opened. This will help in preventing your window from actually being pushed all the way up, and this is usually the major concern once the window air conditioner is fully installed.

L bracket to hold window AC

If your air conditioner does not come with a bracket that is able to hold your window in one place and this is something that is highly called for from your tool collection, then you may need to research the unit you bought a little deeper.  

Look to make sure that the type of window unit you about is the proper size for the window in your house or apartment.  If it is indeed not the correct size you will have to return the unit and possibly explore buying a different brand.

6. Next Step is To Attach the Panels

If you are provided with panels, all you need to do is add the window padding to the sides of your open window. If you were not provided with any padding from the model you bought, all that is required of you is to extend the panels to be able to reach your window. Then what needs to follow is attaching both sides of the panel to your window using the screws that were provided by your manufacturer.

7. Prepare Window AC & Heating System For Startup

You should choose manufacturers who provide brackets and screws that connect your air conditioners to the window sill interior. This is usually an extra level of security and there are those manufacturers who usually don’t find it necessary. If your manufacturers provide them, all you need to do screw them in right away.

Having done this, you need to plug it in and turn on your air conditioner. You should immediately feel it cooling your living space effectively.

Now that you know the best steps to take to properly install a new or used window air conditioning unit into your home or business, let’s now talk about the best window AC units with the best SEER ratings available for purchase today.

Top 5 Window Heating and Cooling Systems Available Today

1. Voltas 185 DZA 1.5 Ton 

Voltas  1.5 Ton 185 DZA
  • 5-star Window AC Unit
  • Available for $289 at most major HVAC brand dealers 

2. Voltas 125 DZA 1 TON 

Voltas 1 Ton 125 DZA
  • 5 STAR Window Air Conditioner
  • Available At Most Local HVAC Dealers for $ 259 

3. Blue Star 3WAE081YDF 0.75 TON 

Blue Star .075 Ton 3WAE081YDF
  • 3 STAR Window Air Conditioner 
  • Available for as little as $183 at most major HVAC supply houses

4. Hitachi RAW312KWD 1 TON

Hitachi RAW312KWD 1 Ton
  •  3 STAR Window Air Conditioner
  • Available at most Heating and Cooling dealers for as low as $246 dollars

5. A Whirlpool MAGICOOL WAC 1.5T COPR 5S 1.5 TON 

Whirlpool MAGICOOL 1.5 Ton
  • 5 STAR Window Air Conditioner
  • The  Average Cost is around  $279 dollars for this unit


Now that you have both all the steps to properly install your new window heating and air conditioning unit as well as the 5 best brands to invest in for the comfort of your home or apartment, there is no reason why you should not sleep comfortably tonight.

If you are still interested though in more information regarding the best central air conditioning systems as well as split systems and existing duct systems on heat pumps for both commercial and residential locations, be sure to read through the following related articles.

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