Best Portable Air Conditioner For Garage With No Windows

Posted by: Mas Broto
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Best Portable Air Conditioner For Garage With No Windows

Getting a portable air conditioner is the best way to keep your garage at a comfortable temperature. But which unit is best for a garage with no windows? In this article, we’ll talk about the different types of garage air conditioners and how to choose the right one for your garage.

If your garage has no windows, you know how hard it can be to keep it cool in the summer. Windows bring light, warmth, and airflow into a room. It will be stuffy and very hot without windows because hot air can’t get out. Portable air conditioner units are great for places like garages where you can’t install a permanent window or HVAC system.

It’s easy to move a portable air conditioner around however you like. Since you don’t spend all your time in the garage, and you might need your portable air conditioner somewhere else, this makes them a good choice to use there.

We’re focusing more on portable air conditioners, because we think they’re the best for the garage with no windows.

Will a Portable Air Conditioner cool my garage?

The short answer is yes, you can cool a garage with a portable air conditioner. However, there are some important considerations to keep in mind.

Cooling a garage is not as straightforward as cooling other rooms in your house. Garages are typically not as well-insulated and may lack proper ventilation, making them more challenging to cool effectively. The materials used in garage construction, such as concrete and metal, can also retain heat, further complicating the cooling process.

To cool your garage efficiently, you need to understand the cooling capacity of a portable air conditioner, which is measured in British Thermal Units (BTU). BTUs indicate the heat content of fuels or energy sources, essentially measuring the cooling power of an AC unit.

For a single-car garage, a portable air conditioner with a rating of approximately 7,000 BTU is usually sufficient. For a double-car garage, you will likely need a unit with around 12,000 BTU. Keep in mind that these BTU ratings are general guidelines. The specific cooling requirements for your garage may vary based on factors such as the garage’s size, insulation, and local climate conditions.

To cool your garage effectively with a portable air conditioner, it’s essential to take additional steps:

  1. Insulate Your Garage: Improve the insulation of your garage to reduce heat gain and enhance the efficiency of your portable AC unit.
  2. Seal Gaps and Cracks: Ensure that doors and windows are properly sealed to prevent warm air from entering and cool air from escaping.
  3. Ventilation: Adequate ventilation is crucial for the portable AC unit to expel hot air effectively. Consider installing exhaust vents if necessary.
  4. Positioning: Place the portable AC unit in a central location within the garage for even distribution of cool air.

What to Consider Before Buying a Portable AC for Garage

When looking for a portable AC unit for a garage with no window, it’s important to know what size to get and how to clean it. Look at the model’s British Thermal Unit (BTU), which tells you how much energy it takes to cool a room and how fast. Manufacturers usually list the square footage along with the BTU to show if the model can cool a large or small room.

Here are some great tips for choosing a portable air conditioner for your garage:

First, make sure to consider the size of your garage when selecting the BTU rating. For a single-car garage, around 7,000 BTUs should do the trick, while a double-car garage may need around 12,000 BTUs. Matching the BTU rating to your garage’s size and insulation level will ensure it cools effectively.

Next, think about your local climate and how often you’ll use the air conditioner. If your garage only gets hot occasionally, you might not need a high-capacity unit. But if you live in a hot area and spend a lot of time in your garage, a more robust air conditioner is a good investment.

Also, consider whether you might need multiple units to cool the entire space. In larger garages or those with multiple sections, using more than one unit can really improve comfort during hot weather.

Finally, remember that a portable air conditioner is an investment in your comfort and in protecting your belongings. By getting a high-quality unit, you can prevent potential damage to your car, tools, and other items stored in your garage. It’s a great way to stay cool and keep everything in your garage in top shape!

Portable air conditioner prices range from $150 to $1,000, so we have the option to choose the best and most affordable portable air conditioners on the market right now. 

What’s the Best Portable AC for Garage with NO Windows?

Before you spend a lot of money on portable air conditioners, check out our helpful buying guide to find the right one for your home garage and your budget.

BLACK+DECKER 14,000 BTU Portable Air Conditioner


Check out the BLACK+DECKER 14,000 BTU Portable Air Conditioner if you need the best portable AC for a garage with no window. It doesn’t have a fancy remote or WiFi, but it does what it needs to do for less than $500.

The BLACK+DECKER portable AC delivers 14,000 BTU to cool a garage space between 550 – 700 square feet. It also has a sleep mode and a mode to remove moisture from the air, making it a great all-around unit. It’s also easy to set up.

SereneLife SLPAC12.5 Portable Air Conditioner

SereneLife SLPAC12.5 Portable Air Conditioner

Consider this portable air conditioner by SereneLife if you need an air conditioner for your garage that doesn’t have windows. It has a strong operating system and a sleek, light exterior design that work together to cool your garage efficiently. The unit also has wheels, so you can move it out of the garage and use it in another room when the garage isn’t being used.

Lastly, the AC has three cooling modes, including a dehumidifier and an automatic swing mode, that make it easy to control the temperature in a closed garage. It also has an easy-to-use remote control system that lets you change the settings whenever you want. The unit can cool a space that’s more than 450 square feet and up to 12,000 BTUs, making it perfect for medium-sized to large garages.

hOmelabs 14000 BTU Portable Air Conditioner

hOmelabs 14000 BTU Portable Air Conditioner

hOmelabs 14000 BTU is the quietest portable air conditioner that you can move around your garage with. It’s easy to set up and works well in any room in your house because it has wheels. With 14000BTU, this unit can cool a room that is 450 to 600 square feet. It also features a horizontal window opening and an automatic vertical swing function that spreads airflow evenly around the room.

The air filter on this device can be washed, which makes it easy to take care of. The remote makes it easy to change any of the air conditioner’s settings. Every two weeks, try to clean the air filter to make sure it works well.

How Many Btus Do You Need To Cool A Garage with NO Window?

When looking for the best portable AC for a garage with no windows, the size of the space you want to cool is the most important thing to consider. If you buy a unit that is too small, the system will work too hard, and your monthly energy bill will go up. If your portable AC unit is too big, it might use more power than you need and cool down so quickly that it can’t get rid of all the humidity in the room.

Use the chart below to figure out how many BTUs you need for your garage:

Garage Size (square feet)BTU needed
250 up to 3007,000
300 up to 3508,000
350 up to 4009,000
400 up to 45010,000
450 up to 55012,000
550 up to 70014,000
700 up to 1,00018,000

Final Words

Most garages don’t have windows that can be opened to let in the fresh air. Adding a portable air conditioning unit to control the temperature and humidity is one of the first steps to making the space usable.

A portable air conditioner for a garage with no windows makes the space more useful without putting too much strain on your home’s HVAC system. This is the simplest way to make a room more comfortable.

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Mas Broto

Have been in the heating and air conditioning (HVAC) industry for over 20 years. He is person that will grow and thrive to learn more about the HVAC industry throughout his career. Mas Broto is also a blogger, who's dedicated to bringing you the best knowledge to get ahead in the game of life.

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