How long does an air purifier last?

Most air purifiers and their parts will last for a long time, so you shouldn’t have to buy a new one anytime soon. If your filter needs to be replaced, though, there are some tips for making the process easier.

The good news is that air purifiers typically last a long time; most parts should still work well at the 10-year mark. But this does not include the dangerous contaminants in your air like airborne pollutants and allergens. These are what your filters remove from the air in order to keep you healthy and safe as you breathe it in again. So the air purifier will not last forever.

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Replacing a basic filter

If your air purifier has a basic filter, you’ll want to replace it after 3-6 months of use. To determine how long it’s been since you replaced the filter, look at the number of hours it has been running and its average speed setting. If you run it for 10 hours and it runs at setting 2, that means you have replaced your filter twice on average.

For replacement, use a compatible model from the same manufacturer as your air purifier (or if you have an ionizer machine, one that uses similar technology). Change it as needed to keep the air clean and free of contaminants in your home. Consult your air purifier’s manual for information about replacing the filter.

If you have an ionizer model, be sure to replace the filter with an ionizer compatible basic filter. This will allow for the full strength of air purification and ensure the integrity of the ionizer model. Remember that not all parts are alike, so if you try to use a different model, your machine may not run as well or may break altogether.

Replacing a HEPA filter

The HEPA filter is designed to last up to 6 months before needing replacement. To prolong the life of your HEPA filter, you have a few options. First, try to keep the air purifier at a higher setting, 4 or 5, whenever possible. This should increase the longevity of your filter.

If you notice that the air quality in your home has not been as good lately as it was when you first got the machine, it is probably time to replace the HEPA filter. Remember, though, that even if you don’t notice any change in air quality in your home, it may still be time to replace the filter.

Changing filters

Anytime you replace your filter, use discretion. Some filters usually work on the same sort of principle as your air purifier and ionizer machines. It might be a good idea to use the same model filter with the same type of machine, just to make sure that your machine will still be able to perform well in the future. If you use a different filter or a different model, it’s possible that your machine may not function properly.

To change an air purifier filter:

Turn off and unplug air purifier; then remove filter by pulling it out from the front (if you have gravity-fed machine) or reversing direction (if you have water-fed machine). Do not touch any exposed metal parts, as this may damage them.

Widely recommended by air purifier manufacturer for changing filters is to first remove the filter and then unplug the machine. Unplug your air purifier and remove the filter.

Use a brush to clean out any clogs inside of your machine, and then replace the new filter. Use a long-handled brush, such as an old paintbrush, and be careful not to break any parts.

Put the new filter into place and make sure it sits securely in its slot in the front of your air purifier. Then plug the machine back in, turn it on and run it for about 20 minutes.

If you have an ionizer, use the same method to change the filter.

Note: Not all filters are interchangeable between models and may not work as well for some machines as they do for other machines of the same type. You should always try to use a filter that is designed to be appropriate for your air purifier or ionizer model. Follow your manufacturer’s instructions for replacing the filter and refer to their manuals when purchasing replacement filters or filters from another source.

How long does an air purifier last?

Your air purifier will not last forever. It will eventually need to be replaced. It is part of your responsibility for maintaining your machine and keeping it working up to the highest quality standards possible in order to ensure that your family is breathing clean, safe air. The good news is that the life expectancy of all air purifiers and their parts is often much longer than you may expect.

Cleaning your filters will extend your machine’s life and improve its performance, but it won’t stop it from breaking down at some point. The same goes for replacing filters; it will prolong the life of your machine, but there is still a limit on its durability over time.

How long are HEPA filters good for?

A HEPA filter is good for about a 1-3 years before it needs to be replaced. If you are seeing a decrease in the air quality in your home, it may be time to replace the filter. When you change your filter, make sure that you thoroughly clean the new one with cleaner or with water before putting it into place. You may also want to use a different brand of filter when replacing your original filter because different types of filters may be incompatible with some models.

How can I prolong my air purifier's life?

Just like any other product, an air purifier will eventually wear down after a certain point, and it will need to be replaced in order to keep your family breathing clean air. Although this normally is a very expensive process, there are strategies you can use to make your machine last longer. One of the most important things you can do to prolong your air purifier’s life is to keep it clean and well maintained.

This will help it perform better and will help prolong the life of your air purifier filter. Another thing you can do to prolong the life of your air purifier is to replace filters as needed so that they are not clogged with dirt and dust. If you notice that there are any contaminants in your home after using the machine, unplug it and change your filter immediately.


Filters, such as the HEPA filter, are designed and used to remove irritants in your home and clean up the air that you breathe. However, they will not last forever. There are many good replacement filters out on the market today and of course, it is well worth it to get quality replacement filters.

This will ensure that you have a quality product to help you breathe easier in your own home. Filters should be cleaned regularly with a vacuum brush or damp paper towel in order to prolong their life.

Replacement filters come in many sizes and types for different kinds of air purifiers and may be manufactured by different companies than your original air purifier's filter. Filters come in many sizes as well, and you may want to use a different size or type of filter for your air purifier if it is incompatible with the original one.

For example, if you are using an air purifier which needs a HEPA filter, you should make sure that the replacement filter is also a HEPA filter.

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  • 3-STAGE FILTRATION: Comes equipped with a washable pre-filter for large particles like lint and fur, a High-Efficiency Activated Carbon Filter for toxic fumes and unpleasant odors, and an HEPA Filter, which captures at least 99.97% of dust, pollen, and any airborne particles with a size of 0.3 microns (µm)
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  • FILTER REPLACEMENTS: Depending on usage, the filters should be replaced every 6–8 months. You can buy new filters by searching "B08BC5V6ZF" and "B085C22XWC". Remove the plastic wrap before installing a new filter
  • HIGH PERFORMANCE AIR PURIFIER: Circulates the air 1x per hour in 743 square foot rooms and 4.8x per hour in 153 sq. ft rooms, ensuring thorough purification. Ideal for medium to large sized rooms such as: dorm rooms, bedrooms, and other living areas.
  • TRUE HEPA FILTRATION: This air purifier for home features a True HEPA air filter that captures up to 99.97 percent of harmful germs, dust, pollen, pet dander, mold spores, and other allergens as small as 0.1 microns from the air
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  • ZERO OZONE CERTIFIED: Our air purifier is Ultraviolet - C (UV-C) enabled, providing and extra layer of defense, helping to reduce airborne germs such as Staphylococcus Albus, Escherichia Coli, Aspergillus Niger, and Phi-X174 as well as airborne bacteria and mold spores.
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  • QUIET OPERATION: The lowest setting can be used as gentle white noise at night for a quiet, restful sleep
  • QUALITY TESTED & BACKED: CARB, ETL, and Energy Star certified. Backed by a USA registered Lifetime Warranty when genuine Medify replacement filters are used. The replacement filter (B084Q965BF) lasts 2,500 hours or about 3-4 months
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Nick Le Page

 An air purifier is a device designed to remove dust, pollen, smoke, soot, mold spores, smog, and other airborne pollutants from the air.

If you want to keep your home clean and free of contaminants—and save money on heating and air conditioning bills—quality air purifiers are a powerful first step.

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