How to Add AC to Garage

Do you frequent your garage throughout the year and feel like it could benefit from some air conditioning? If so, adding a window unit AC to your garage can increase its comfort level and temperature regulation drastically. But before you dive into such an installation, there are several important factors to consider.

How to Add AC to Garage

In this blog post on how to add ac to garage, we’ll explore the process of adding an air conditioning system to a residential garage space step by step. Get ready for lasting cooling and refreshing comfort in your new, fully climate-controlled workspace!

Why Adding Ac to Garage is Needed

1. To Keep the Heat Low

Adding AC to your garage can be a great way to keep the temperature comfortable and protect any of your items that may be sensitive to heat or cold. This is especially beneficial in areas with extreme temperatures, as it can help reduce condensation on items like tools, equipment, and vehicles stored inside the garage.

2. To Increase Air Quality

The air inside your garage can often be filled with dust, pollen, and other particles, which can harm the quality of your air. Installing an AC unit will help to filter out these particles and provide you with cleaner, fresher air. This is especially important if you are using your garage as a workspace, as it will help reduce the levels of pollutants in the air.

3. To Save Money

An AC unit can help you save money in the long run by reducing the amount of energy you use to cool your garage during warm months. As well, it can also reduce your energy bills by ensuring that any items stored in extreme temperatures are protected from damage.

4. To Reduce Noise

If you have a noisy garage, installing an AC unit can be a great way to reduce the levels of noise that enter your home or workspace. It can also help keep any conversations you have in your garage private by reducing outside noise pollution.

5. To Increase Comfort

Ultimately, adding AC to your garage can make it a much more comfortable environment. When properly installed, the air conditioning unit will help maintain the temperature and humidity levels in your space so you can enjoy spending time in your garage without having to worry about extreme temperatures or uncomfortable humidity levels.

Installing an AC unit may seem intimidating at first, but with the proper research and preparation, it can be a relatively simple project that has many benefits. Start by researching the power requirements for any equipment you plan on installing, then use this information to find the best AC unit for your budget and needs. Be sure to hire a professional if you don’t feel up to doing it yourself, and you’ll soon be able to enjoy the benefits of a cool and comfortable garage.

10 Instructions on How to Add Ac to Garage

Measure the Size of Your Garage

1. Measurement

Measure the size of your garage to determine the size and type of air conditioning unit you need. The right measurement will allow you to purchase a unit that can adequately cool your garage. Also, consider any obstructions that may prevent the unit from being installed in certain areas.

2. Design and Planning

Once you’ve determined the size of your garage and the type of air conditioning unit you need, it’s time to design a plan for installation. You should include how you would like the system to be set up, where the intake and exhaust vents will be located, and what type of electrical wiring you may need.

3. Electrical Wiring

Depending on your garage’s existing setup, you may need to hire a licensed electrician to install new wiring for the unit. Make sure all connections are secure and safe to prevent short circuits and other hazards.

4. Purchasing the Unit

Shop around to get the best price on your air conditioning unit, keeping in mind the size of your garage’s dimensions as well as any special features you may need. Don’t forget to purchase any accessories or mounting equipment as well.

5. Preparing the Garage

Before you begin installing your air conditioning unit, take some time to prepare the garage. Move furniture and other items away from where the unit will be located and make sure nothing is blocking any of the vents.

6. Placing the Unit

You’ll need help with this part since it requires mounting the unit to the wall or ceiling. Make sure you are following the manufacturer’s instructions and that all necessary hardware is included in your purchase.

Need to Hire a Licensed Electrician to Install

7. Connecting the Air Ducts

Attach the intake and exhaust ducts together as well as to the air conditioner according to the manufacturer’s instructions. Secure any joints with duct tape to prevent air leaks.

8. Wiring the Unit

Connect the electrical wiring to your air conditioner as directed by the manufacturer’s instructions. Make sure all connections are secure, and use a voltage tester to ensure they will hold up against fluctuations in electricity.

9. Testing the System

Once everything is connected, turn on the unit and test it to make sure everything is working properly. Check for any air leaks around the ducts and ensure that the temperature of your garage stays consistent.

10. Maintenance

To ensure your air conditioner runs smoothly, perform regular maintenance such as cleaning or changing the filter, checking for air leaks, and tightening any loose connections. This will help keep your air conditioner running efficiently and extend its lifespan.

By following these simple steps, you can easily add an air conditioner to your garage and enjoy cool temperatures year-round. Before beginning the project, consult with a professional if you have any doubts or questions about the process. With the right preparation and planning, adding air conditioning to your garage can be a smooth and successful project.

8 Maintenance Tips 

Connect the Electrical Wiring to Your Air Conditioner

1. Consider the size. It’s important to choose an air conditioner that is appropriately sized for your garage. If the unit is too small, it won’t be able to cool the space effectively. Conversely, if it’s too big, it can lead to higher energy bills.

2. Test the location. Make sure to check your local building codes to ensure that you can install an air conditioner in your garage without any legal issues. You should also measure the space to determine the best place for installation and then test it by blocking off a portion of the window or wall where the unit is going to be installed.

3. Prepare the area. Before installing an air conditioner in your garage, you should prepare the area by cutting away any insulation, blocking off any gaps where outside air can enter, and cleaning the interior of the garage to remove any dust or debris that could interfere with the proper functioning of the unit.

4. Inspect them. If you have existing ductwork in your garage, make sure to inspect it for any damage or blockage that could interfere with air circulation. If necessary, you should clean or replace the ducts before moving on to the installation process.

5. Purchase a unit. Once you’ve determined the size and location of the air conditioner, you can purchase an appropriate unit and related materials, such as flexible ductwork. Make sure to read through the product manual thoroughly before beginning installation.

6. Install the unit. You should follow all instructions in the product manual when installing your air conditioner. This may involve cutting away portions of walls or windows, wiring the unit to a power source, and making sure that ducts are properly connected.

7. Insulate the area. After installation is complete, you should insulate any openings or gaps between the interior of your garage and the outside environment. This will help keep the air conditioner running more efficiently and prevent any leakage of cooled air outside of the garage.

8. Test and maintain. After installation, you should test your air conditioner to make sure it is functioning properly. It’s also important to regularly maintain your unit by cleaning the filter, checking for any signs of wear or damage, and making sure that all connections are secure. Doing so will help ensure that your air conditioner runs efficiently for years to come.  

Regular Maintenance Your Air Conditioner

Following these tips will help you learn how to add AC to your garage safely and effectively. With a little preparation, you can have a comfortable and well-cooled space in no time!  


Adding an AC unit to your garage is a great way to maintain comfortable temperatures and combat extreme weather. It requires careful planning, research, and preparation before you buy any components or products. You should also consider the size of your garage and the power requirements for any equipment that you plan to install.

Once you have finished researching how to add ac to garage, comparing prices, and purchasing materials, it’s time to get started. If you don’t feel up to doing it yourself, be sure to hire a professional who can get the job done safely and efficiently. Whatever route you decide to take, just remember that with a bit of thought and effort, adding AC to your garage can be both rewarding and beneficial.

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Rick Kelly

I am Rick. I grew up helping my dad with his handyman service. I learned a lot from him about how to fix things, and also about how to work hard and take care of business. These days, I'm still into fixing things- only now, I'm doing it for a living. I'm always looking for new ways to help people grow and develop. That's why I have created this blog to share all my experience and knowledge so that I can help people who are interested in DIY repair.

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