How to Install a Window AC Unit – Do and Don’ts

Summer is here and the temperatures are soaring! But what do you do if the air conditioner in your home just isn’t cutting it? This blog will teach you how to install a window ac unit in a simple way and safe.

First, things to consider before installation include the size of the window unit, the condition of the window frame, and the location of the unit. Once you know these basics, installation is simple – just follow the do’s and don’ts outlined in this blog!

So whether you’re looking for relief from the heat or want to avoid buying an air conditioner this summer, read on for all the tips you need to make the installation process go smoothly!

Things to consider before installing a window AC unit

When you are thinking of installing a window air conditioner unit, there are a few things that you should consider. Here we highlight the most important ones:

  1. Make sure the unit is suitable for the size of your window and the climate where you live
  2. Check to see if it has been certified by an accredited testing agency (such as ETL or C-ETL). These agencies have tested the units to ensure they meet rigorous safety and energy efficiency standards
  3. Compare prices and find one that best suits your budget. Don’t overspend on something that won’t do much good in terms of cooling your home during hot summer days!
  4. Finally, be sure to hire a professional installer who will take care of everything for you – from installation to regular maintenance

How to install a window AC unit?

Window AC units are the perfect solution for hot summers and mild winters. However, installation can be a bit of a challenge. To avoid any troubleshooting or damaging the window, follow these do and don’ts when installing an AC unit: Do research on the best AC units for your home and choose the one that will fit perfectly.

Additionally, always use a certified installer when installing an AC unit. This will ensure a safe and successful installation process. Don’t forget to factor in the size of the window unit and the condition of the window frame when choosing the right window unit.

Also, be sure to clean the window frame and the window before installation to avoid any air leaks and moisture condensation.

Step 1: mark the center on the window

Before starting the installation process, it is important to measure the width and height of the window unit. Mark these measurements on the outside of the window frame so that you know where to place the unit during installation.

Step 2: install the weather strip

Next, install the weather stripping around the window frame. This will help to keep air and moisture out of the window while installation is taking place.

Step 3: attach the side panel to the window air conditioner

Attaching the side panel to the window air conditioner is a quick and easy measure you can take to make sure your unit operates at its best. By following these simple steps, you will have everything setup in no time at all!

  • Drill two screws into the outer frame of the window, about an inch above the trim
  • Slide in the side panel and attach it with two screws. Use a level to make sure that the AC unit is leveled properly before attaching it altogether.

Step 4: place your AC in the window

Now it is time to place the unit in the window. First, line up the front of the unit with the mark you made on the window frame and screw in three screws. Be sure to pre-drill these holes before hand to prevent damage to your window frame later on during installation.

Step 5: secure the sash & install L-brackets

To secure the window shutters and install the brackets, follow these steps: 1. Insert the brackets into the sash and tighten them using the screws provided. 2. Check to ensure all screws are tight before closing the window shutters. 3. Make sure to read and follow the manufacturer’s installation instructions for best results!

Step 6: fasten the side panels

Finally, it’s time to fasten the side panels to the unit. Be sure to use the screws provided and make sure they’re tightened down evenly throughout the width of the panel.

Step 7: fill In the gaps

If the side panels don’t fit flush with the window, you’ll need to fill in the gaps using a foam sealant. This will help protect your unit and keep it airtight. Once the sealant is dry, screw the panels back into place and secure them with screws.

Dos & don’ts of window air conditioner installation

Window air conditioners are the perfect solution for hot, humid summers. However, installation can be a bit of a challenge, especially if you’re not familiar with the process.

We’ll provide you with the dos and don’ts of window air conditioner installation, to help you avoid common mistakes and ensure a successful installation. Follow these simple installation guidelines to avoid any problems:

Do attach panels and rails for support

When it comes to installing an air conditioner, you don’t want any accidents! That’s why it is important to use the right tools and attach panels and rails properly.

Make sure the unit is installed on a firm foundation so that it doesn’t wobble or fall off during installation. And last but not the least, make sure all personnel working on the installation are well-trained in using these safety measures.

Do install L-brackets

If you’re installing the air conditioner on the side of the window, be sure to install L-brackets so that the unit is stable and secure. These brackets can also help reduce noise pollution from the unit.

Do use appropriate supply of hinges and screws

Don’t skimp on hinges or screws when it comes to window air conditioner installation! They are essential for stability and durability. Make sure to use enough hinges and screws so that the installation is secure but not too tight or heavy. This will keep your energy bills down in the long run!

Do install foam seals

There are several good reasons why window air conditioners should be installed with sealant. In the event of a leak, the sealant will help to prevent dirt and water from getting into the unit.

It also helps to stop drafts and noise from entering the room. Likewise, weather stripping is essential for protecting windows from moisture damage as well as windblown debris. Installing your air conditioner in a level and plumb position is also crucial for avoiding problems down the line.

Why is My Window AC Leaking Water from The Inside and/or Outside?

So whether you’re experiencing an ac leak from the inside or outside your home, read on for tips and solutions!

Do take in account the tilt

Installing an air conditioning unit can be a daunting task, especially if you’re not familiar with the installation process. Make sure to consult your local building codes before starting the job.

You also need to take into account the tilt of your window – it needs to be at a level that allows the unit to function optimally. Also, make sure that the installer is certified and has all the necessary equipment for this type of installation.

While air conditioners consume energy by default, they are essential in hot weather conditions and should not be neglected when planning for cooling needs in your home or office. Always keep an eye on power bills in case of any unexpected outages!

Do provide sufficient area for airflow

Providing sufficient air flow is essential for the health of your window unit. Make sure the area you are installing the AC unit in has enough space for air circulation.

The size of your window should also be considered, as not all units are compatible with all windows. In case of a sliding window, make sure the installation process doesn’t damage it in any way- this can cause problems down the line.

Finally, always consult a professional to install your AC unit – they will know how to do it properly and avoid any potential problems that could arise during or after installation

Don’t try to install on your own

If you’re thinking of trying to do it yourself, please don’t – there’s too much risk of injury and the unit might not work properly. Better off calling in a professional installer who will take care of everything for you and guarantee that the unit is installed correctly.

Just make sure you have enough information about your window unit beforehand so the contractor can get started quickly. In addition, budget for the installation fee in advance.

Don’t leave the side panels unsecured

Air conditioners work best when the side panels are securely fastened to the window unit. If these panels are not properly secured, air circulation will be hindered and the unit could even start smoking or produce strange smells.

Make sure that all screws and bolts attached to the side panels are tight- otherwise, moisture may get inside and damage the unit unnecessarily. Check for leaks before installing, it’s always a good idea to take some time before actually installing your AC unit to check for any leaks. This way you can avoid any costly repairs down the line! Look around windows and doorsills

Don’t forget to check the measurements

Make sure the air conditioner unit you’re considering is the right size for your window. Units that are too large can obstruct your view and be a nuisance to operate. Likewise, units that are too small won’t be able to cool the room adequately.

Always consult an expert before installation to get the measurements needed and make sure you have enough space on either side of the window unit for it to fit correctly.

Don’t use an extension cord with your window AC

Window air conditioners are a great way to keep your home cool in the summer, but using an extension cord can be risky. By wiring the window AC unit improperly, you’re opening yourself up to potential damage – extension cords don’t just amplify the electrical current, they also increase heat and wear down insulation.

To avoid this problem altogether, make sure to wire the window AC unit properly first. Then position it so that it exhausts outside and away from any ventilation openings.

Finally use weather stripping and level installation to ensure that everything is installed correctly – otherwise you run the risk of damaging your unit or worse yet, opening up your home to pests/insects! Regularly cleaning filters will help keep your window AC running smoothly – making life much easier for both you and the appliance!

How to Clean Window AC Unit: A Step-by-Step Guide

Window air conditioners need to be properly maintained and clean to function at their best

Frequently Asked Questions

Does an AC unit have to sit on concrete?

No, an air conditioner unit can sit on a wooden or metal stand. However, the unit should be placed so that the cord is away from windows and doors as it may obstruct visibility.

What happens if you put a window AC sideways?

This is the most common installation error. When air conditioner unit is installed the wrong way, the air flow will be disrupted and it will not work properly. The side of the unit that faces outside should have a window if possible to allow proper air flow.

Why does an air conditioner need to sit for 24 hours after you install or move it?

It’s necessary for the oils in the compressor to settle before turning the unit on, not doing so can affect the performance of the unit.

Should AC be pointed up or down?

When the air conditioner unit is installed, the air should be directed towards the floor so that it can distribute evenly throughout the room. However, if window unit is newer and has a special coating which allows heat to escape more quickly, then the unit may need to be pointed down as this will help circulate air faster through out your home.

Which way should a window AC tilt?

Most air conditioners tilt in the window-facing direction to maximize the air flow. If there is no window, the unit may be installed so that the side with the condenser faced out and tilted down.

Does a window AC unit need its own outlet?

There is no specific requirement, but it’s a good idea to have your air conditioner unit plugged into an outlet that is both safely covered and easily accessible.

Do window AC units have to be mounted?

No, air conditioners can be placed on the floor or a stand. However, it’s generally recommended that the unit be mounted in order to reduce noise and ensure optimal cooling performance.

Can a window AC go in any window?

Window air conditioners are designed to fit in the window frame of a standard window. If the frame is too narrow or the air conditioner unit is too large, it may not fit properly and could cause damage.

What is the proper way to install a window air conditioner?

Window air conditioners should be installed by a professional. If the unit is to be placed in the window, the air conditioner unit and window frame must fit properly so that there’s no damage done to either.

Can I install a window AC unit myself?

It’s possible to install a window air conditioner unit yourself, but it’s not recommended as the unit may not be installed properly and could cause damage.


A window AC unit can be a lifesaver during the hot weather months. However, before you go and buy the unit, make sure to read the do’s and don’ts below so you can install it correctly the first time. Follow the instructions and you’re good to go!

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