Informational Guide

Do Air Purifiers Cool Down a Room?

Air purifiers are a great solution for those wanting a healthy home by cleaning the air, but will they cool a home?

by Josh M

Air purifiers are becoming increasingly popular in the home, but there’s a lot of misconceptions about what they can and can’t do. Air purifiers are great at promoting a healthy home by cleaning the air, but owners often ask if air purifiers cool down a room.

This article will make it clear what air purifiers can and can’t do explain whether they cool down a room or not.

The biggest misconception is that air purifiers are the same as fans, but let’s be clear, they aren’t. Fans are much simpler devices that blow air around a room, whereas air purifiers are designed to make your air cleaner.

Desktop Cooling Fan in Room

Air purifiers do use a fan to direct airflow through them and back out into the room, but you won’t get the same results as a fan.

While air purifiers can produce a very small cooling effect, a fan is dedicated to cooling your room and functions entirely to circulate cold air.

Both have their uses but don’t think you can tick both boxes with just one of them.

Air purifiers actually have more similarities with humidifiers. Read our guide, which compares air purifiers and humidifiers here.

Sharp Air Purifier

Do Air Purifiers Cool Down A Room?

Air purifiers are designed to make your air cleaner. They do this by pulling air into the purifier using a fan and then forcing the air to flow through a filter. This then removes bacteria, mold, pathogens, and other contaminants.

While air purifiers are really useful in the home, they aren’t designed to alter the temperature or humidity of the air. Air purifiers do use a fan in the process of cleaning the air, so there can be a minimal cooling effect in the immediate area, but this wouldn’t cool a whole room.

If you’re looking to cool your home, you need a fan or an air conditioning system. These are designed to regulate the air temperature in your home and keep it exactly where you want it.

Air purifiers also won’t dry your air or alter the humidity in your room. If you need to remove moisture from a room in your home, you’ll need to invest in a good humidifier.

Fans & Filters in Air Purifiers

There are two main types of air purifiers: those without fans and filters and those with fans and filters. Air purifiers without fans and filters use UV light to sterilize the air in your home. They work by deactivating certain bacteria and viruses, effectively removing them from your air.

Air purifiers with fans and filters are far more common and are generally considered more effective. The fan works by sucking air out of the room, into the device. The air then passes through a series of filters before flowing back out into the room.

Generally, the fans in these purifiers won’t be powerful enough to impact the temperature in a room; however, there may some localized impact right around the air purifier.

Other Ways to Cool Down Your Room

So, air purifiers aren’t the way to cool down your room, but that doesn’t mean you don’t have options. Here are 5 great ways to cool your room down quickly:

1. Switch on the Ceiling Fan

Ceiling fans are one of the most effective ways to cool down a room. They’re designed to regulate the airflow, drawing the warm air up and forcing cool air throughout the room. These can be used in conjunction with air purifiers to keep the air clean and cool.

Check out our guide for the best ceiling fans for bedrooms.

2. Turn on Portable Fans

Portable fans are a great way to cool down a room quickly and can be especially useful on holiday. You can move them about as needed, or even better, you can turn on several portable fans at once to enhance the cooling effect. These can also be used with air purifiers.

3. Open/Close Windows

Opening your windows is a basic but effective way to control the temperature of a room. You do need to be aware of the environment around you, though, and this might not work for everyone.

Air purifiers will be less effective if you open the window as there will be more bacteria and contaminants entering the air supply, and the filter might not be able to handle it.

4. Minimize Sources of Light

One of the best ways to control the temperature in a room is to limit the light within it. Sunlight will warm a room incredibly quickly, and even something as simple as pulling the curtains can keep your room cooler for much longer. Day/night blinds will block the light completely and are pretty affordable.

Day & Night Window Blinds
5. Install an AC Unit

Air conditioning units are the best way to monitor and control the temperature in your home. There are a variety of different AC units available to suit your needs, and you can choose from portable ACs to fully fitted home air conditioning units.

Air conditioners can be more expensive but are worth it if you want to cool a room. They can also be used in conjunction with air purifiers.

People Also Ask (FAQ)

Do air purifiers make the room hot?

No, air purifiers should have no impact on the temperature in your room; they only clean the air.

Is it OK to leave the air purifier on all night when sleeping?

Yes, air purifiers are entirely safe to leave on all night and are actually more effective if you leave them on. This will provide you with clean air while you sleep, which is beneficial to your health and prevents bacteria from building up in the room overnight.

Does an air purifier help with breathing?

Air purifiers can help with your breathing by removing some harmful bacteria and contaminants from the air, which prevents them from entering your lungs. They can also help those who suffer from allergies by removing some specific allergens from the air.


Air purifiers are a great way to enhance your health and wellbeing by ensuring you have a fresh supply of clean air. However, they aren’t designed to cool down a room and won’t have that effect. If you want to cool your home, you should invest in a fan or air conditioning unit which will regulate the temperature in a room effectively.

Last Updated on May 6, 2022

Josh M

My name is Josh and I am obsessed with the HVAC industry. I created this website to help HVAC techs of all levels get the best out of their heating & cooling systems. I have spent thousands of hours studying air conditioners, heaters and home air products so you can learn & buy with confidence. Learn more about the team here.