Garage Ventilation Might Be More Important Than You Think

Garage Ventilation Might Be More Important Than You Think

You think about ventilation in your home, such as in your bedroom at night so you can sleep comfortably, but ventilation is just as important in your garage.

Not securing proper ventilation in your garage can cause you big problems. 

Why is garage ventilation so important?

Ventilation will prevent chemicals and fumes from your vehicle or DIY projects from lingering in the garage, which can harm your health. 

It will also prevent excessive heat and humidity from causing discomfort as well as problems like mold growth.

Bear in mind that your garage can get hot – without any cooling options in your garage it could experience 10 to 18 degree hotter temperatures than the temperature outside (via Garage Living).

So, with that in mind, let’s look at everything you need to know about garage ventilation and how to improve it so your garage is a healthier place in which to work. 

Don’t Skimp On Garage Ventilation

Don’t Skimp On Garage Ventilation

We’ve touched on some reasons why you need to properly ventilate your garage, but here’s a rundown of some of the most important things to know about garage ventilation. 

Too much heat can damage items

If your garage is very hot due to a lack of ventilation, this can cause items inside it to become damaged. For example, if you’re storing paint in your very hot garage it can become unusable because the heat will change its consistency.

Excessive amounts of heat can also be dangerous, such as if you’re storing electronics. This is something to be aware of if you’re turning your garage into a man cave fit with an entertainment area! 

Lack of ventilation can cause mold to grow

Mold thrives in areas of the home where there is a lack of natural light and ventilation, and this can become a health hazard. Mold can also damage surfaces in the garage. 

Toxins from the garage can contaminate the rest of the home

Those toxic fumes from your car and chemicals you use in your garage can enter the rest of the house, leading to indoor air that’s potentially dangerous and terrible to breathe in. 

How To Ensure Your Garage Is Properly Ventilated

There are many things you should do to ensure that your garage is properly ventilated and safe. Here’s a rundown of the most effective ways to ventilate your garage. 

You need to install an exhaust fan

This can be put on the wall and how it works is that it draws clean air from outside through the use of grilles in order to let the air circulate through the garage.

An exhaust fan also maintains a slightly low air pressure in the garage so that fumes can’t seep through cracks and enter the rest of the home.

You can make use of vents if you don’t have windows

If there are no windows in the garage, you can install vents.

You should put these high on the walls or in the roof of the garage so that the warm air that rises will be released from the vents. Turbine vents are worth considering because they draw dirty air out of the garage. 

If you have a window, consider installing a window fan

This will do the job of drawing out stuffy, toxic air from your garage and is a good option if you don’t want to add more windows in your garage.

A simple box-style fan that you put on the table in front of the open window can work beautifully. 

How To Install A Garage Exhaust Fan

To ensure you properly install a garage exhaust fan, you should follow these tips: 

  • You need to start by cutting a hole in the garage ceiling for the exhaust fan. Make sure you measure it so that it will fit snugly. 
  • Find the electrical wiring box for the garage so that you can switch off the power. 
  • Next, you’ll have to run extra wires from the closest junction box to the hole you’ve made for the fan.
  • Cut the wire so that it’s the right size, and for this you can use wire cutters. 
  • Now you can go ahead and install the fan. 
  • Once that’s done, you can connect the exhaust hose to the fan. Gently push it through the roof until you can see that its nozzle has moved through it (via Do It Yourself).
  • Fasten it to the outside of the roof with brackets – these will be in the exhaust fan installation kit you have purchased. 
  • Connect the wires and screw the fan onto the wall. 
  • You must check that it fits the hole well and go one step further to seal it by putting some caulk around the casing. 
  • Go ahead and turn the electricity on so you can check that the fan is working.

How To Choose The Best Garage Fan

How To Choose The Best Garage Fan

There are different types of garage fans that are available. These include air-circulating fans, such as those that are mounted onto the ceiling or wall, and blower fans which are great for larger garages because of how they have more powerful motors.

Garage fans tend to have higher CFM (cubic feet per minute) ratings than household fans, which makes them more powerful because they’re designed to move a lot of air through their blades and these will usually be made out of strong materials such as stainless steel. 

It’s important to consider important factors when choosing a garage fan so that you ensure proper ventilation for your garage. 

The fan’s CFM

The higher a fan’s CFM, the more it will produce airflow so that the air will cool down at a faster rate. A small garage can be ventilated well with a fan that has a lower CFM, while larger ones should have more.

To help you figure out how much you need, follow this guideline: a fan with 3,000 CFM will be enough to circulate the air in a three-door garage, while a one-door garage will require a fan with 1,000 CFM (via Garden Beast).

How it’s mounted (or not)

A fan that you rest on the floor will be useful for cooling down the air and providing air circulation in the area that you need it, but wall fans will help to circulate air throughout the entire garage, so that’s something to consider if you’re going to be spending time in all parts of the garage while you work.

For example, if you tend to move around from one area to the other while you work on different tasks. 

What Should You Never Store In Your Garage?

Earlier, we mentioned how it’s important to ensure proper ventilation in your garage so that the items that you store in it won’t be tarnished.

But there are some things you should never, ever, store in your garage because of how garages are susceptible to becoming very hot. These items include: 

  • Paint. As already mentioned, paint can be ruined by high temperatures. Extremely dry and hot temperatures can also cause chemicals in the paint to evaporate, which will change its color and consistency, deeming it unusable. 
  • Food. Do you keep your emergency stash in the garage? That’s a bad idea because it will attract pests. Even canned food shouldn’t be stored in the garage because it will be affected by fluctuating temperatures – think of how cold the garage gets in winter and then very hot in summer.
  • Books. These are also affected by humidity, which can make books become a breeding ground for mold. 
  • Propane gas canisters. These are dangerous as their fumes could be ignited when you start your car (via Good Housekeeping). If they leak, this can also cause problems, especially due to how the garage is usually a small, confined space. 

Related Questions 

How much does a garage exhaust fan cost? 

You’re looking at approximately $130 to $200 if you want to purchase a quality exhaust fan for your garage. 

Should you use a dehumidifier in your garage? 

This will help to decrease the amount of humidity in your garage, making it feel more comfortable and preventing issues like mold. But, a dehumidifier will eliminate moisture but won’t blow out cold air so it’s best to combine it with fans.


Keeping your garage well ventilated will ensure it’s cool instead of stuffy, which is important if you’re spending lots of time in it. Ventilation will also help to maintain the health of your indoor air, so it’s something you should seriously think about.

In this article, we’ve looked at easy ways in which you can enhance your garage ventilation, such as by installing a garage fan. Keep cool!  

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