Since studies have proven that the majority of people across the globe live in homes that have substandard air, having a quality air purifier is a must for everyone. Air purifiers use one or more filters to both trap and eliminate unhealthy pollutants from the air so that you can breathe better and be healthier. Even people without allergies will enjoy a good air purifier because it creates a much healthier environment.

Can you leave an air purifier on all the time? The answer according to most experts is a resounding “yes.”

Here are some of the main reasons why leaving an air purifier on all the time is such a good idea.

1. That’s What it Is Meant to Do

Simply put, air purifiers are built to operate nonstop. This is one of the reasons why air purifiers are made to be so quiet. Keep in mind that before you purchased that air purifier at your local store, it passed a lot of rigorous testing to ensure that it is ready for long-term use and that it will work properly around the clock as soon as it is plugged in.

Air purifier manufacturers make their products with sturdy motors, long-lasting filters, and fan motors that can withstand a lot of use. When you stick with a reputable brand name, you can rest assured that you’re getting an air purifier that can operate 24/7 and continue to provide you with expert air filtration.

2. They are made to be Energy Efficent

Some people are hesitant to run their air purifier 24 hours a day because they believe it will increase their monthly utility bill, but this is not the case. For example, if you use a HEPA air purifier that is rated 50 watts per hour, you’d only be paying around $5 to $6 per month extra. You can check the wattage of the air purifier simply by looking at the package where the product information is located.

It also does no good to turn the air purifier off occasionally because as soon as you do, it undoes the effects you gained by having it on for so long. Once your home is free of pollutants, turning off the machine simply allows more pollutants to appear in the air, then you have to start all over again.

If you’d like to find out how much your Air Purifier will cost to run be sure to check out our energy usage tool.

3. It Is Likely Protected Against Short Circuits

Air purifiers are made to remain on throughout the entire day, so most brands come with short circuit protection. What this means is, it will automatically cut off the power to the machine if any type of electrical malfunction is detected. In other words, once the malfunction is detected, the air purifier will automatically turn off.

This is a safety precaution that most air purifier manufacturers add to their machines so that if you’re not at home or you’re asleep and something happens, you don’t have to worry about anything dangerous happening. Check to make sure the brand you buy has this feature before you buy an air purifier.

4. It Offers a Continuous Filtration Process

Since dust and other contaminants are a continuous occurrence, running your air purifier 24 hours a day is the best way to make sure you have clean, fresh air to breathe around the clock. Keep in mind that as soon as you turn off your air purifier, the air filtration process stops, which means you’ll once again be breathing in pollutants such as dust, allergens, pollen, and many others.

Another advantage of keeping your air purifier on 24/7 is you can eliminate dust buildup because the air purifier is constantly getting rid of all dust mites. This means dust won’t have time to settle on your furniture, mirrors, drapes, and so on.

5. It Likely Has an Auto Mode Feature to Keep Utility Bills Low

An auto mode feature basically adjusts the fan speed of the air purifier depending on how much air pollution you have. The more pollutants you have in the air, the faster the fan speed will be, so the speed adjusts based on how much pollution is in the air. This feature alone helps the noise level stay down and helps conserve energy – two things that are important when operating an air purifier 24/7.

The auto mode feature is also something you don’t have to think about because it is always there doing its job. There are no settings to set or buttons to push. As soon as you turn the machine on, the auto mode feature is ready to start working.


The bottom line is, air purifiers were manufactured to be on 24 hours a day, seven days a week. All of their features are designed to make this easy on the machine and easy on you. So once you get your air purifier home, go ahead and turn it on and forget about it so it can do its job!

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