Does an air purifier really work?
Michael Gray
Updated on April 20, 2026
The bottom line. Research shows that filtering the air can indeed help to remove harmful particles from indoor spaces, particularly allergens, smoke, and mold. Still, air purifiers work best in conjunction with proper filtration and home cleaning techniques.
Do air purifiers work for Covid?
Portable air cleaners and HVAC filters can reduce indoor air pollutants, including viruses, that are airborne. By themselves, portable air cleaners and HVAC filters are not enough to protect people from the virus that causes COVID-19.Is an air purifier a waste of money?
Portable air purifiers, or single-room standalone units, are often a waste of money in the long-term. Cost is also a huge factor for most people when considering clean air upgrades and what the best effective method is to get better indoor air quality.Are air purifiers proven to work?
No purifier can capture all of the pollutants and particles that travel through a room, but depending on the type of filter used, they may capture many allergens and other unwanted substances. Many air purifiers feature HEPA filters that capture particles, including dust, pollen, and some mold spores.Do air purifiers improve your health?
Air cleaning devices such as air purifiers help improve the quality of your indoor air by removing or reducing pollutants and allergens. These substances may worsen symptoms of allergies or asthma. They may also contribute to more serious lung conditions and even certain cancers.Everything an Air Purifier Can and Can't Do
What are the disadvantages of air purifier?
The disadvantages of air purifiers are:
- You need to have the windows closed.
- Regular maintenance is required.
- Old filters worsen air quality.
- An air purifier needs free space around it.
- Air purifiers are not entirely quiet.
- Some air purifiers produce ozone.
- It does not solve all indoor air quality problems.
Do air purifiers help lungs?
Many of the potential benefits of using an air purifier are related to your lungs, particularly for conditions such as asthma. “By filtering out fine particles, purifiers help clean the air you breathe and lessen the potential negative effects of pollution,” says Dr. Taliercio.Where is the best place to put an air purifier?
The best place to put an air purifier is somewhere in your breathing zone. The closer the unit is to your head, the shorter distance clean air has to travel before it reaches you. In the bedroom, this usually translates to putting the air purifier on a nightstand or small table close to the bed.Do air purifiers make the room cold?
An air purifier will not keep a room cold, and unless it is operated at a high fan speed, it will not provide the amount of airflow required to provide even a cooling effect from air circulation. For true cooling, an air conditioner or fan should be considered.What do air purifiers remove?
Air purifiers sanitize the air, getting rid of pollutants, allergens, and toxins; they're different from air filters, which only remove them from circulation.Do you really need air purifier at home?
“This is a tricky question as there is very little evidence that air purifiers actually do anything,” Dr. Golden said. “Most filters on the market are good at filtering out particles like dust and pollen, but they aren't great at removing gaseous pollutants like VOCs (volatile organic compounds) or radon.”How do you know if you need an air purifier?
Tips to Know if You Need an Air Purifier
- Funky Smells. If you have been noticing a series of mysterious and funky odors throughout your living space, it may be time to consider purchasing an air purifier. ...
- Allergy Symptoms. ...
- Copious Dust Mites. ...
- Sick Family Members. ...
- You Snore. ...
- You Use Varnish and Disinfectants.
What is the best purifier for home use?
Best Water Purifiers For Home Use at a glance:
- Kent Supreme Plus 2020 Water Purifier. ...
- Eureka Forbes Aquasure Amaze Water Purifier. ...
- Mi Smart Water Purifier. ...
- HUL Pureit Copper Water Purifier. ...
- LG Puricare WW150NP Water Purifier. ...
- Faber FWP MAT+VitaminC+RO Water Purifier.
How long do Covid particles stay in the air?
Transmission of COVID-19 from inhalation of virus in the air can occur at distances greater than six feet. Particles from an infected person can move throughout an entire room or indoor space. The particles can also linger in the air after a person has left the room – they can remain airborne for hours in some cases.How air purifiers can be harmful and aggravate health conditions?
Some ozone emitting air purifiers can be harmful. They cause shortness of breath, coughing, and chest pain. Exposure to higher levels of ozone can damage your respiratory system. Air purifiers with HEPA and activated carbon filters are generally safe for use.Does HEPA 13 filter Covid?
So yes, HEPA filters can catch particles that contain coronaviruses. People expel droplets of respiratory fluid, saliva, and possibly viruses into the air when breathing, coughing, and talking.Do air purifiers make the air dry?
Why Don't Air Purifiers Make the Air Dry? Simply put, an air purifier has no mechanism for drawing moisture from the air. As air passes through the filter material, particulates and/or chemical gases are captured. Moisture, though, cannot be captured by air purifier filters in any appreciable quantity.How long does it take to air purify a room?
It can take your air purifier 30 minutes to clean air in a small room. For larger rooms, it can take up to 2 to 3 hours. Invest in an air quality monitor to test your air quality. The worse it is, the longer you'll want your air purifier running.Can I leave my air purifier on all the time?
Run your air purifier all the timeSince air pollution is a pervasive and continuous problem, it's best to leave your air purifier on all day. There are no perceived drawbacks to keeping your unit running all the time, and if the filters are changed on time it can help to reduce pollutants in the home.