Do Air Purifiers Cool Down a Room? (Temperature Explained)

I always feel the need to clarify what air purifiers can and cannot do. For instance, people always ask me if their air purifier cools down their homes as it purifies their air. It’s a fair question, especially during the hot summer months.

However, air purifiers cannot cool down a room as it purifies the air. It’s more important than ever to clean the air in your home with a purifier, but if you’re looking to cool down your room, you’ll need another device.

Let’s explore what an air purifier can and cannot do when it comes to regulating room temperature.

Are Air Purifiers the Same as Fans?

The biggest misconception I come across is that air purifiers are the same as fans. Let me be clear – they aren’t. Fans are much simpler devices that improve air circulation and blow air around a room. An air purifier is a much more complex device that makes your air cleaner.

Desktop Cooling Fan in Room

While air purifiers use a fan to direct airflow through them and back out into the room, they don’t deliver the same results as a fan. Air purifiers may seem like they put out cooler air under certain conditions, but they aren’t like a fan that’s dedicated to cooling your room and circulating 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 in common with humidifiers.

However, there are always exceptions. There are portable air conditioners and fans that come equipped with an air purifier feature. These may cool your room as well as purify the air.

Do Air Purifiers Cool The Room?

Air purifiers have a fan to pull air into a filter but they aren’t designed to alter the temperature or humidity of the air. They do not have a cooling unit.

Modern air purifiers work by circulating the air and pulling it in using a fan. After air purifiers circulate the air, it forces the air to flow through a filter. This removes bacteria, mold, pathogens, and other contaminants.

Since air purifiers pull air into the system and circulate the air with a fan, it might cool the air immediately around it during the air circulation process. However, the effect it has on the entire room will be minimal.

To cool your home, you need a fan or an air conditioning system. These are designed to cool the hot air 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. To add 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 with fans and filters and those without. 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.

An air purifier typically consists of fans and filters and those are generally considered more effective. They typically consist of 1 to 3 filters that are either mechanical, electrical, or hybrid air filters. The more filters it has, the less direct air flow you’ll feel.

The fan sucks the air out of the room and into the device. Then the air passes through a series of filters before flowing back out into the room.

Generally, the fans in most air purifiers have no impact on the temperature in a room. However, there may be minimal 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 I can recommend a few things that will. 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 improve air circulation and 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 like a desk fan is a great way to cool down a room quickly. 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 runaway winner for monitoring and controlling 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.

AC units 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 not make the room hot, just like they won’t make a room cold. An air purifier will have little to no impact on the temperature in your room. Your air purifier will only clean the air.

Will Dyson air purifiers cool the room?

Certain Dyson air purifiers are designed to cool the room. Several air purifier models, including the Dyson Pure Cool Link, Dyson Pure Hot+Cool, Dyson Pure Cool Tower, and Dyson Pure Cool Me, feature a cooling fan that can help reduce the temperature in your room.

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

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

How much air will my air purifier blow out?

To determine how much air your air purifier will blow out, you can refer to its CADR rating. CADR stands for Clean Air Delivery Rate and measures how much clean air an air purifier can deliver into a room of a specific size. This is a measurement of the filtered air flow in cfm (cubic feet per minute).

Does an air purifier help with breathing?

Air purifiers can help with your breathing. By removing harmful bacteria and contaminants from the air, they will not enter your lungs, allowing you to breathe easier. They can also help you if you suffer from allergies by removing some specific allergens from the air.


I love my air purifiers because they clean my air and enhance my health and well-being. However, I know not to rely on my purifiers to cool down the air in my house.

If you need to keep a room cold, you should invest in a fan or air conditioning unit. These units are designed to regulate the temperature in a room effectively.

Josh Mitchell

Josh Mitchell

My name is Josh and I am obsessed with DIY and improving my family home. HVAC topics can be tricky for homeowners so I decided to share my knowledge on the subject. When I am not working on DIY projects, you can find me at the beach or my local coffee shop.