How to cool a garage with no windows

To cool your garage, if it has no windows, you need to use a mini-split air conditioner, a converted air conditioner, or a cooler or fan.

Garages tend to have poor insulation and ventilation, and this can cause the space to become exceptionally hot during the summer.

Fortunately, you can choose between mini-split air conditioners (AC) and other types of air conditioners, as well as evaporative coolers and fans, to cool down your garage, even if it has no windows.

Why do garages get so hot?

Although most homes are prepared to handle the higher temperatures on particularly hot and humid summer days, your garage may be a different story.

The combination of a lack of proper ventilation and insulation, coupled with the presence of heat-generating cars, tools, and other appliances can make this space truly, unbearably hot.

This contrast will be especially obvious if you have air conditioning and proper ventilation in your home, but not in the garage.

How to cool a garage with no windows

Although it is common to have a garage that generally has a higher temperature than the rest of your home, this does not make it any less uncomfortable or inconvenient.

Fortunately, there are plenty of ways that you can cool down your garage, even if you have no windows to improve the ventilation in the space.

An air conditioning system will always be the most effective way to lower the temperature of the air in the space and make it more comfortable to work and live in.

If your garage does not have windows, your best option will most likely be to install a mini-split unit, which does not require any ductwork, which is always an advantage for garage spaces that do not have existing ductwork, and no vents, which is great if you have no windows.

If a mini-split unit is too expensive for you or you just prefer a different kind of air conditioner, you do not need to worry. Both window air conditioning units and portable units can be converted to fit into a space that has no windows.

There are also other options, like evaporative coolers and dehumidifiers. These options are not as effective as an air conditioner, but they will go a long way to make your garage more comfortable and cooler.

Regardless of which cooling solution you choose, the best way to ensure that your garage remains as cool as possible is to insulate it well.

This can be done by adding insulation panels to the garage door and by placing expanding foam in any large holes and cracks that may be letting hot air into your space from outside.

How to cool a garage with no windows How to cool a garage with no windows
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Mini-split air conditioners for garages with no windows

If you are looking for the most convenient and efficient way to cool down your garage, a ductless mini-split air conditioner is the best choice. This type of unit functions in the same way that a central air conditioner does, with an indoor and outdoor unit.

The difference, however, is that the ductless mini-split unit does not require that you install any additional ductwork or vents in your garage and simply needs to be sized and installed by a professional HVAC technician.

These mini-split units come in a variety of shapes and sizes and some units can even double as a heater in the colder winter months, like this Commercial Cool 18,000 BTU Ductless Mini Split Air Conditioner with Heat, which costs $1 515.37. This unit can cool a space of up to 1000 square feet to 60 degrees Fahrenheit.

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How other air conditioners can be converted for garages with no windows

If you are a DIY-expert or you just cannot afford a mini-split unit, window and portable air conditioners can be converted to work in a windowless space.

You can place a window air conditioner in a garage with no windows by cutting a hole in the wall and mounting the unit in the hole instead of a window. This Whirlpool WHAT122-2AW is specifically designed to fit through a wall.

When it comes to portable air conditioners, these units can be vented out of a hole in the wall, with the help of a wall vent connector kit.

How to cool a garage with no windows How to cool a garage with no windows
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Other ways to cool down a garage with no windows

An evaporative air cooler is another great budget-friendly option, which does not need to be mounted or vented out of a window.

This HESSAIRE MC18M Portable Evaporative Cooler cools spaces that are up to 500 feet big and it has two fan speeds to choose from.

Another option is to use a fan, like this high-velocity Lasko Utility Fan. Although this will not actually cool the space, it will make you more comfortable.

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