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Can HEPA Filters Be Washed and Reused

Can HEPA Filters Be Washed and Reused?

If you've bought a device that uses a HEPA filter, you will likely be aware that many HEPA filters need replacing after prolonged use.

For people who don't understand what a HEPA filter is, the filter is usually used in filtration systems, and it traps impurities, dirt, dust, allergens, and far more in the air.

After having a HEPA filter operating for some time, you'll have to replace the filter since there'll be a build up of undesirable particles and germs.

If you know how to clean them, then it is possible to reuse the filter, saving you money in the long term.

In this article, we'll discuss the different kinds of filters and answer your question of "can HEPA filters be washed and reused?"

Non-Washable HEPA Filters

If not all, HEPA filters will be promoted as non-washable and will be required to be replaced every couple of weeks to months, based on your device's make and model.

If your unit is a filtration system that runs at high capacity daily, you will have to determine whether the filters you're using can be reused.

You can try to wash them and reuse them, even when the brand says to throw them after use, but be aware that they will not be working with the same thoroughness afterward.

Different Cleaning Methods

Can HEPA Filters Be Washed and Reused

There are a few different methods you can use to wash your HEPA filter. Given below are the approved methods you need to use to clean your filter. All HEPA filters will have to be cleaned in different ways, based on the filter's design and model.


HEPA filters that contain PTFE fibers, which are incredibly permeable and are constructed from activated carbon, can be cleaned. To clean the HEPA filter, you need to use a solid cold-water stream, not use detergents or other compounds.

You should not brush or rub the filter because this may damage it and cause it to not work properly. Wash it in cold water, be very tender, and ensure that you don't harm the filter.

When it begins to go out of a dirty color to clear or the original color, you will know it is cleaned. Let it air dry thoroughly before installing it back in the filtration system.

Vacuum Cleaner

It is also possible to wash HEPA filters by using your vacuum to remove dust, dirt, and other particles from the filter. This method isn't as great as the washable formula and will leave behind some trash.

Attach the cloth attachment to your vacuum cleaner and lightly run the cleaner over the HEPA filter to eliminate the excess dirt, dust, and allergens.

After that, moist a soft washcloth under cool water and squeeze out the extra water. Wipe any residual dirt and grime from the filter and rinse the cloth multiple times if you require to wipe it more than once.

If you don't do this, you will just be putting the dirt and dirt back on the filter, which will beat the purpose of washing it. Next, set the HEPA filter onto a soft surface to allow it to air dry. You don't want to put it in any sunshine, as this may end up damaging the filter.

Sink Method

Can HEPA Filters Be Washed and Reused

Lastly, you can wash the filter under cold running water to remove any other dirt. Use the cloth as needed to help eliminate any residual dust or dirt. Don't use any chemicals or additives, which may cause the filter to become damaged and not work correctly.

If you have to use soap due to stuck particle build up, we propose putting a minimal drop of dish soap into a bowl of cold water and using it. Put the filter out to air dry completely before putting it back in the filtration system.

Disclaimer: Why Shouldn't You Reuse HEPA Filters?

Can HEPA Filters Be Washed and Reused

Reusing HEPA filters sounds like a dream. You want to bear in mind that this is not necessarily the best method. Keep in mind that items that are thought to be replaced since they won't work maximum after use.

HEPA filters can be vacuum-cleaned, but in the procedure, the HEPA filters are meant to catch particles with up to 99% accuracy; this implies that it is nearly impossible to vacuum each of the remaining particles and germs from the filter. You might end up breaking the filter by washing it since it is very fragile.

And if you don't let the filter dry thoroughly before using it on your filtration system, you might be causing the filter to grow mold and spread it throughout your residence. Please consider those details before you go and try to clean your HEPA filter and then reuse it.


HEPA filters are built to trap particles and help your home create safe and fresher air. Just do not forget that you should really think about replacing your HEPA filters every couple of uses, particularly if you're planning on reusing them.

While the filter may not seem like it's broken or damaged, the filter still won't necessarily be working at optimum performance. Which is critical to your residence and your air. So, to answer the question, "can HEPA filters are washed and reused?" The answer is yes, and no.

About the Author Tom Hanson

I’ve worked as an HVAC tech in Phoenix, AZ for the past 10 years. I created to help home owners select the right portable air conditioner, cooler or air purifier for their needs & budget in just a few minutes.

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