How Long Should You Run An Air Purifier?

To those who have recently begun using an air purifier, you may be thinking about how long you should run an air purifier for the greatest results.

No longer should you be wondering, as we will now discuss how quickly and effectively an air purifier can clean the air. Give this piece a brief read, whether you’re a newbie or a seasoned pro in the area of air purification.

Spoiler alert: You should run your air purifier almost all day long!

Many people may think that purchasing air purifiers are a waste of money, but an air purifier may be a very useful tool for removing unpleasant odors and pollution from your home and providing fresh, clean air in practically every area.

However, if you only use your air purifiers for a few hours a day, it might be difficult to tell how pure your air is.

How do air purifiers function?

Depending on the appliance’s capabilities, it might take anywhere from 30 minutes to 2 hours for an air purifier to clean the air in your home.

Air purifiers with a greater Clean Air Delivery Rate (CADR) cleanse indoor air faster than those with a lower CADR standard.

Consider the features and functionalities of the model you are using to figure out how long you need to leave your air purifier operating in your home.

How Long Should You Run An Air Purifier

Here are the things that influence your air purifier’s performance:

CADR requirements:

The Clean Air Delivery Rate is a metric used to determine how well a household air purifier works. Depending on the size of the particles, this rating affects how much air your air purifier cleans every minute. The CADR specification is made to test the air purifier against pollutants of various sizes, notably smoke, dust, and pollen.

A higher CADR specification means you won’t have to operate your air purifier for so long to improve the air quality in your space (if the room sizing is correct).

Size of the room:

Every air purifier works the best when installed in a space that fits its requirements. When put in an 800 sq. ft. room, the Dyson Pure Cool TP04 air purifier, for example, is extremely efficient. If you put it in a larger space, you might have to operate the air purifier for longer to clean and filter the air and make the room safe for those who suffer from allergies.

In brief, air purifiers must be put in an appropriately sized space in order to function properly, as much as you would size an air conditioner’s Watt value to a room in square feet.

Rate of air extraction:

Air extraction is called the volume of air a purifier can filter each hour. This rate affects how quickly the equipment cleans the air within the house. Typically, this measurement is expressed in terms of air changes.

If both are positioned in properly sized rooms, an air purifier rated for 4 air changes per hour may filter indoor air twice as quickly as an air purifier rated for 2 air changes per hour. In this case, an air purifier with a 4 change per hour extraction rate will successfully filter the air in a room in just one hour of operation.

Type of filters:

HEPA filters are now typically used among most air purifiers. In addition to regular filters, some purifiers contain activated carbon filters.

The greater the number of filters, the greater the resistance, implying that air will move significantly slower.This impacts how quickly the air purifier cleans the air to eliminate dust, pollen, pet dander, dust mites, and other pollutants.

As a result, air purifiers with multiple filtration settings may need to operate for more than 2 hours to improve air quality inside the specified room sizes.

Now that we have introduced you to some of the basic functions of air purifiers and the different factors that have an impact on them, we shall now move on to answer the real question:

How long should you run an air purifier?

It’s crucial to realize that air purifiers aren’t simply used when the air quality in your house is poor; they may also be used to maintain high air quality, making the answer a little more involved than a simple “how long” response.

The following factors determine the length of time it takes to use an air purifier:

  • What sort of problem you’re dealing with and how severe the air quality is in space (smoke, pet dander, dust, etc.). 
  • The size of the space and the air purifier’s airflow rate (cleaning capacity).

One to two hours is generally enough time for an air purifier to cycle and clean the air in a room for the first time. We recommend leaving it to operate at least 8 hours every day to preserve air quality.

Running your purifier 24 hours a day, seven days a week will provide you with the purest, cleanest air possible. This may be done with the fan speed set to low or medium.

Note: Certain models include sensors and will automatically alter fan speed, making this a set-and-forget scenario.

Therefore, if you are usually at home, the ideal option is to continuously run the air purifier 24 hours a day.

This also implies that you should not turn off your air purifier during the day or night. But if you have multiple air purifiers in your house, you may not need to run them all day long.

When you’re not at home, however, you don’t necessarily need to have the air to be perfectly clean. Furthermore, an air purifier requires power to operate, and its filters must be maintained and replaced on a regular basis.

As a result, lowering the amount of time you need to operate your air purifier provides advantages.

But why 24/7?

Every home includes air vents that enable air from the outside to enter your rooms. This air is typically contaminated with smells, dust particles, pollen, and other allergies. If you switch off your air purifier, the air will get polluted as contaminants from the outside accumulate. While the device can remove 95% of contaminants from indoor air in 1-2 hours, it can only do so while it is running.

How can you shorten the cleaning time of an air purifier?

The correct size and type of air purifier may drastically reduce air purifier running time. There are many additional ways to accelerate the process. Here are a few basic procedures that involve little effort but will improve the performance and efficiency of your air purifier.

  • When using an air purifier, keep windows and doors closed. It keeps outside pollutants out of the room and keeps clean air in.Only keep windows and doors open when you need rapid fresh air and do not have an air purifier, such as after cooking, dusting, or taking a smoke break.
  • Maintain your system on a regular basis, changing the filter and cleaning it once a month. Check to see if the air purifier operates by looking at the airflow flowing out of the vents. A properly functioning air purifier would continually pull unclean air in and expel clean air.
  • Allow it some breathing room. Set an air purifier 2-4 feet away from a wall or furniture to ensure that the airflow circulation is not obstructed. We recommend installing an air purifier at the highest moving air point, such as a doorway or a window. Never leave it beneath a window, moist location, or electronic gadget to avoid unavoidable damage.
  • Invest in many air purifiers. Multiple air purifiers in a space will not make you sick or cause the air to dry up. It will expand the purifying coverage and the amount of pollutants removed from the air at any given moment. If you just have one, move it from room to room to clean the air. This way, the air purifier would be the first to eliminate local contaminants.

Pollution levels can, however, affect run-time:

The level of pollution in the room and the purifier’s power influence the purifier’s operating duration. Unfortunately, most air purifiers do not display the degree of pollution in your home. As a result, it’s difficult to tell how your air quality is making progress.

On the other hand, some more modern air purifiers use colored light to show your air quality. When the pollution indicator displays low pollution levels, you can switch the device off or adjust it to the lowest setting. These lights can also help you decide if you want to enter the space immediately or wait until the air is cleaner.

Frequently Asked Questions:

Q. Is it safe to sleep with my air purifier on?

Yes! Air purifiers are safe since they just filter pollutants from the air and do not add anything to it. If you’re a light sleeper, you might want to choose a model with a “sleep” mode.

Q. Is it safe to leave an air purifier running all the time?

It is safe to leave your air purifier on all the time because the devices are designed to function continuously without failure or harm.

Q. What is the cost of running an air purifier? 

Electric expenses are increased by 0.5% to 8% while using an air purifier. The expense depends on how often you use it, the air purifier’s model, and what mode the device is set in.

Q. Do air purifiers consume a lot of power?

Most purifiers require very little power (low and medium) for the most typical settings. Even the most efficient air purifiers require only a little amount of electricity – roughly the same as a ceiling fan.

Q. How hot do air purifiers get? 

When left alone, HEPA filter air purifiers do not get hot or have any harmful parts to worry about. Some of the most modern types are self-adjusting, which means they can detect air quality and only switch on (or operate the fan at a greater speed) when necessary. 

Q. Should I open my windows while running my air purifier? 

If the air is really dirty, keep your windows shut at all times and rely on your air purifier to do the rest. But, if the air is not contaminated, it is recommended that you allow fresh air into your home every now and then and later close the windows again.

Q. Is it necessary to use HEPA filters?

No, you may use other filters too. HEPA filters, on the other hand, are ideal for home air purifiers since they target particles of all sizes. Ozone filters, for example, are hazardous to have indoors and should not be used at home. 

Q. How can I tell whether my air purifier is working properly? 

Check the filter, keep a record of the filter indication, use an IAQ (indoor air quality) meter to keep track of the air quality, and observe the airflow to ensure that your air purifier is working properly.