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There are some brands, like Winix, that do offer a washable activated carbon filter however, it will still need to be replaced every three to six months because the material will degrade over time.
#K and n pre filter manual#
Pre-filters that you do not wash can be vacuumed clean to avoid damaging the filter’s density.Īlways check the air purifier company manual to find out if your pre-filter can be washed or not.Ī mesh pre-filter can we washed and reused for the life of the air purifier unit. You cannot wash a pre-filter if serves a dual purpose, like an activated carbon filter. You can wash a pre-filter if it’s made of washable mesh material.
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If you check out our top 10 air purifiers guide, you’ll find both options so you can get the right air purifier pre-filter for your needs. The next best option would be an air purifier with its own dedicated mesh pre-filter that works to protect the main HEPA air filter and activated carbon filter.
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Therefore, we always recommend that you choose an air purifier that has at least an activated carbon filter that acts as a dual pre-filter and odor remover.
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With that said, you don’t necessarily need a pre-filter on an air purifier however, it does improve the efficiency of the unit. A pre-filter is good to have because it protects the main internal filters from damage. This leads to cleaner air that has fewer toxins and smells fresher.Ī pre-filter is an essential part of an air purifier because it sieves large particles that can impede or shorten the life of the filtration system. An activated carbon air filter will do two things: stop large particles from entering the air purifier and trap gaseous pollutants like chemical vapors, volatile organic compounds (VOCs), and odor molecules. It is made up of activated carbon material that is in either powered, granular, or honeycomb form. A carbon filter air filter is a more advanced type of pre-filter.The sole purpose of a mesh pre-filter is to trap large contaminants before they enter the air purifier unit. It is made up of small pores or netting that allow air to flow through but stops large particles like dust, dirt, hair, and other debris. A mesh pre-filter air filter is similar to a sieve.The type of pre-filter used in an air purifier will depend on the other types of internal filters. A carbon filter traps both solid particles and gaseous pollutants. A mesh pre-filter only traps solid particles. There are two types of pre-filters: mesh and carbon. The efficiency ratings in that research study for the air purifiers would have likely been different if a pre-filter was not used. The air cleaners in this study clearly showed the capacity to capture substantial amounts of airborne dust particles and airborne allergens.” The last filter consisted of a high efficiency particulate air (HEPA)-type filter, filtering 70% of 0.3-μm particles and 95% of 1.0-μm particles. In this research study on enhancing indoor air quality with air filters, the followed was discovered, In the air cleaners, the air was filtered first by a coarse pre-filter, followed by a Rota-filter, in which small dust particles were captured by rotation at high speed. dust, dirt, hair, and some pollen).Īs you can see, HEPA filters and pre-filters are used for two distinct purposes and each type of filter depends on the other for improved efficiency. allergens, bacteria, mold spores, and smoke).Īn air purifier pre-filter, on the other hand, is used for trapping particles that are around 2 microns and larger (i.e. This design is what allows the HEPA filter to trap ultrafine pollutants down to 0.3 microns in size (i.e. In our article on what are HEPA filters made of, we explain how these air filters contain a dense set of interwoven fibers. And a pre-filter is not used for the same purpose. The most common main air filter type is a HEPA filter. Pre-filters are used to protect the main internal filters so they can filter out smaller contaminants and this helps the main filter last longer and be more efficient. See all of Amazon's Best Selling Air Purifiers What is a Pre-Filter Used for?Ī pre-filter is used for two things: capturing large particles and extending the life of the main internal filters.