Can I clean my air purifier filter instead of replacing it?

Author: Darion Marquardt  |  Last update: Sunday, November 16, 2025

The general recommendation is that HEPA filters should be replaced, not cleaned.

Can air purifier filters be cleaned and reused?

Some air purifiers have separate filters, so you can clean them individually and buy each one as it needs replacing, but others have an all-in-one filter cartridge which can mean you'll need to replace the entire filter each time.

Can you clean air filters instead of replacing them?

Not as Effective: Over time, cleaning may not remove all particles, reducing the filter's efficiency. Not Suitable for All: Some filter types, like spun glass and pleated filters, cannot be cleaned.

Can you clean an air filter without replacing it?

Yes you can but, blow it out from the inside of the air filter all the way around and it will work for at least another six months under normal conditions. Next time you should replace it with a good quality filter.

Do air purifier filters really need to be replaced?

It's recommended that you change your filter every 12 months. If you run your air purifier frequently or are experiencing a lot of indoor air pollution, you may need to change the filter more often. This may happen if you live somewhere that has more pollution, such as a city center.

How to Clean a HEPA Filter

What happens if you run an air purifier with a dirty filter?

Dirty Air Filters Reduce Airflow, Increasing Strain on Your Blower Fan. Blower fans are designed to push air through the filter. If the filter becomes too clogged with dust, dander and debris, then the blower has to struggle harder to pass the air through the blocked filter.

What happens if I don't change out my air filter?

Air filters that are overdue for a change are a common cause of HVAC system failure. Over time, dirt builds up in the heating and AC filters, causing components such as the motor to go into overdrive, which may eventually overheat your unit.

Is it OK to wash an air filter?

Immersion in Warm, Soapy Water – Where stubborn air-borne dirt is present, the filter may be dipped in a solution of warm water and mild detergent. Then simply rinse in clear water, let stand until completely dry and free of moisture, and return to service.

Can you clean air purifier filters yourself?

Wash your HEPA filter with warm water and allow it to dry if your model specifically states that water cleaning is safe. You can also soak your filter in hot water if it is extremely dirty. Clean non-washable, permanent HEPA filters using a vacuum to remove dust and debris.

Is it OK to use washable air filter?

Disposable air filters are more effective at trapping small particles. Washable air filters are typically only good at protecting from large particles like dust. They do not effectively filter out pet dander, bacteria, viruses or smoke, especially when they're not meticulously maintained.

Is it better to clean or replace the air filter?

This is not true. Cleaning the air filter not only does not improve, but also deteriorates its filtration properties. Only periodical replacement of the filter with a new one can provide efficient filtration of the air entering directly into the combustion chamber of the engine.

Can I clean a Dyson filter instead of replacing it?

We suggest you clean your filter at least once a month to keep your machine running at maximum efficiency.
  1. Remove your Dyson filter(s) Remove your filter(s) from your Dyson machine.
  2. Remove excess dust. ...
  3. Rinse filter(s) ...
  4. Give it a firm shake. ...
  5. Leave to dry for 24+ hours.

How do I know if my HEPA filter is washable?

First, one has to determine whether the filter is washable or not (usually indicated on the label). Why's that? Well, most HEPA filters are made of fibers, and using water might damage the fibers which are responsible for trapping the tiny particles.

Can you clean an air filter instead of buying a new one?

Yes, some kinds of filters are washable! That means that instead of getting rid of your air filter when its three months are up, you can wash the dust and debris off and place the filter back into your HVAC system. Not all filters are reusable, so make sure you have a washable filter before running it underwater.

Are washable HEPA filters as effective?

First of all, while washable filters can handle larger particles made of dust and dirt, they're not as good at trapping tinier contaminants, viruses, and bacteria. Not to mention that washable filters still need to be properly maintained to be able to function well.

Why is my air purifier filter so dirty?

If there is a lot of dust, pet dander, or other particles inside your home, your air filter can get dirty very quickly. Construction, renovations, or a lot of pollution outside can also cause your filter to clog quickly.

Can HEPA filters be cleaned and reused?

You can try to clean them and reuse them, even if the brand says to discard them after use, but be aware that they won't be operating with the same thoroughness afterwards. There are a few different methods you can use to clean your HEPA filter.

How to tell if an air purifier filter needs replacing?

If you notice a decrease in the air purifier's performance, it could be a sign that the filter is clogged and needs to be replaced. Decreased airflow or reduced effectiveness in removing odors are common indicators.

How often should I clean my air purifier filter?

Pre-filters should be gently vacuumed every 1–3 months. Many air purifiers have a pre-filter that captures larger particles like hair and dander before they reach the main filter, protecting your main or carbon filter so it doesn't clog up as quickly. Clean pre-filters frequently, about every 1–3 months.

Is it bad to use air purifier with dirty filter?

However, once the filter is dirty or clogged, it's important to change it. A full filter, while a good sign, makes it harder to push air through and the purifier can no longer work efficiently. Good filtration is crucial for air purification. That's why it's important to check and change system air filters routinely.

Can you soak an air filter to clean it?

SOAK THE FILTER in Original Dirt Remover for 3–5 minutes / BIO Dirt Remover for 12 hours. SQUEEZE THE FILTER to work out all dirt particles.

What happens if air filter is dirty?

Airflow restriction caused by a dirty filter can strain engine components and lead to poor combustion. So, what happens? Your engine compensates by using more fuel to create the same amount of power. This is not only inefficient, but it also means you will notice reduced acceleration and less horsepower.

Will air stop working if filter is dirty?

Is my AC not working because of the filter? Potentially, yes. While there are a whole host of issues that could cause problems with your air conditioning system, a dirty air filter should be the first thing to check if your central air conditioning unit isn't working as properly as it should.

How long can you go without changing air filter?

How Often Do I Need to Change Out My Air Filter? Generally, most air filter manufacturers and HVAC companies recommend changing your air filter every 90 days, or 3 months. That can change based on where your home is located (ex. dusty, dry climates), if you have any pets, and the age of your system and equipment.

Is a dirty filter better than no filter?

It is best to get a replacement filter as fast as possible. Is no AC filter better than a dirty one? No. A dirty filter will slightly protect against some dust particles that will damage your AC system.

Previous article
Why can't I use a dehumidifier in the bathroom?
Next article
How much does it cost to service an oil burner?