9 Best Pre Filters for Air Purifiers in 2026 – Expert Quality Picks

Customer Review: Great purchase am happy very easy to use, very quiet effective looks great love the lights and the fact you can turn it off and adjust to suit love it for my allergies works great. Fit perfect anywhere the settings works great i put mine on auto. My breathing is much better. So happy I purchased this.

Customer Review: This air purifier has been perfect for my open concept living room and kitchen area. It was super easy to set up, all that was needed was to attach the legs, take packaging off the filters and plug in. It has a nice sleek touch panel, which is easy to use and understand the buttons. The touch panel has an aesthetic color changing sensor, that shows the quality of air in the room. Since I’ve had the purifier it does an excellent job with dust, pet dander and kitchen odors. While it doesn’t instantly eliminate a heavy smoke smell, it reduces the lingering smell of cooking dinner. I keep the purifier on the lower setting and it is almost silent and you can barely even hear it being on. When it’s on the higher setting it sounds like a nice fan and doesn’t have an annoying sound.Overall, it is a powerful, reliable machine that excels in large living spaces. If you want a breath of fresh air without a complicated setup, this is definitely worth purchasing.

Customer Review: I bought this because I had been buying the HRF-AP1 from the largest brick & mortar retailer in the world (starts with a W). They stopped carrying it, seemingly overnight, and instead only offered only HEPA and carbon prefilters packaged together. You replace the carbon pre-filter 5x to 10x more often than HEPA cartridge so that move made no sense. You would be hard pressed to find a genuine Honeywell HRF-AP1 pre-filter in stock anywhere locally or even on the web. I initially bought a 2 pack of 16″x48″ prefilters described as “odor reducing”, “carbon pad”, & “charcoal filter”. This was a major aftermarket domestic filter company that sells on Amazon. I knew something was off when I opened their filters and there was an ODOR. What? Wait a minute, how am I detecting something like a VOC coming from an activated carbon filter? I compared the filtering ability of some HRF-AP1 remnants to the aftermarket junk I bought and wasn’t all that shocked to fink that the honeywell remnant removed just about any source of odor I put in front of it while the aftermarket had no affect on any of the same odor sources or VOC sources. Yeah, I eventually became disgusted by the smells accumulating in my living space and aggressively searched for a viable alternative. I noticed that Amazon manages to keep the HRF-APP1 A+ version in stock for just a few bucks more than what I was used to paying. It threw me off that they used a generic pic of the carbon filter wrapped around a drum HEPA cartridge instead of a pic of the retail box which one might expect to see. The only difference I can see is that the A+ version has white flecks in the filter which are identified by Honeywell as “zeolite” which you can read all about on wikipedia. It has some ups and downs. For instance now I don’t feel comfortable wearing a square of HRF-APP1 inside a mask since zeolite is a respiratory irritant. You can cut this Honeywell activated carbon filter sheet to fit just about anything that you need a filter or pre-filter. For example, I use it for odor reduction as a prefilter on two Holmes HEPA units. I can make 4 prefilters with a little left over for other things such as deodorizing the fridge, sock drawers, bath towel storage area etc. etc. I suspect that Honeywell doesn’t like that their product gets used for so many other applications, especially HEPA units made by other brand names/manufacturers since a major retailer started to only carry the package deal of HEPA and carbon pre-filters together. If so, what would be the reasoning? They are making MORE money than if they only sold the carbon filters to people needing them for Honeywell products. This is one of the most value packed and versatile products out there. I hope this review helps others in making a wise purchase.

Customer Review: These do Exactly what I was hoping they would. Definitely help cut down on odors and have the air in the room smelling fresh and clean. Like other’s have said, they are more porous and have white specs of odor absorbing additive, which is by design.Cutting them to fit with the templates provided was somewhat easy, but I do wish they came in different pre-sized versions. Also, I do not know how long the carbon/zeolite will last with de-odorizing, but it was immediately noticeably working within an hour of installation.

Customer Review: Great filters that continue to do an awesome job of cleaning the air. They collect a lot of dust and debris and always arrive in perfect condition. The air quality in my home has definitely improved from using these and the Honeywell filters are always quiet. Great value because of the 4 filters per box.

Customer Review: These Look exactly like the one that came with my HPA 100. They are precut which is great because I didn’t want to go though the hassle of cutting them myself. Perfect fit, but make sure you order the size that matches your model. I’m seeing a lot of review of people complaining they don’t fit right, but if you look at the size they ordered and the the machine they are complaining that it doesn’t fit, it’s really no mystery why it doesn’t fit correctly for them. MAKE SURE YOU ORDER THE CORRECT SIZE! If your machine has only 1 HEPA Filter order the HRF-A100 if it has 2 HEPA filter order the HRF-A200 and if your machine has 3 filters order the HRF-A300

Customer Review: Great filters that work!!! they do exactly what they are supposed to do. Take all the particles out of the air so your body doesn’t have to. I have recently tried some knockoffs that seem to be performing as well as these for a quarter of the the price. By having multiple units in my house it seems to greatly extend the life of the filters. I keep an eye on the pre filters and will use the shop vac to clean them off and usually replace every six months instead of three. The HEPA filters often last 18 months or more. Put them in your cart and keep an eye on the price or set an alert on camelcamelcamel.com when they drop in the $60 range stock up or give the knock offs a try.

Customer Review: The pre filters fit my Honeywell perfectly. They arrived with no bad smell, have a nice thickness to trap dust, dog hair etc, and so easy to use and change. Amazon has the best price I have been able to find and will continue to purchase.

Customer Review: Perfect fit for my air purifier; love the price & quantity!! Arrived quickly; works very well at filtering the dust to juniper in the air so I’m not sneezing in my home. Will definitely order again.Especially for my family due to we had four purifiers to keep up.

Customer Review: Fits well and does the job for much less than the manufacturer’s replacements.

Customer Review: I purchased this for my office in a busy aesthetics suite to help purify the air and keep circulation moving throughout the day. It has been such a great addition to the space.I love the soft white-noise effect — it adds a calming background sound during treatments without being distracting. Clients often comment on how peaceful the room feels.We actually have several Levoit purifiers in our home as well, and they truly last for years. The filters are easy to clean and replace, and the overall quality is excellent even with heavy daily use.This is one of those products that just works — reliable, durable, and worth every penny. Highly recommend.

Customer Review: I had gotten large air purifiers before but this one is great! I love the features. It’s not to loud. It worked wonders on my daughter’s room ( a bonus room bigger than the master). It helped with dog hair, dust, and allergies. Powerful for the size!

Customer Review: This was great, just what we wanted for our window air conditioner unit, we wanted to make sure that there was an extra filter one of our pets has asthma. So far this has been great, no smell, can cut the item to fit the size of the unit. This is also easy to clean and I feel like it’s a great product, thick material.

Customer Review: Air purifiers have gone up a stupid amount, like so many other things. We were about to just go without having one, but I wanted to make a last ditch effort to find filtration media we could cut to fit our old model. It cut easily with scissors and wasn’t difficult to press into place. Triple-layering this makes for very clean smelling air and an easier rinse of each layer as needed. Now we have it running in our nursery 24/7 and we’re all breathing easier. We’ll be back to buy more! Thanks!

Customer Review: These filters fit perfectly and work in my Honeywell HPA5100W air purifier. I like that these filters already come precut to size. I use these in my foster cats room and they WORK! They collect a lot of dust and pet hair. I usually vacuum the filters to extend their longevity. They’re not the best quality as in compared to the filters that originally came with the air purifier but they’re cheaper and still work good. Overall, I’d buy again!

Customer Review: These work just as well as the expensive Honeywell brand.

Customer Review: This Levoit air purifier is hands down the BEST I have ever used & I have tried several. I got it for our 3 story apartment & have had it about a week & have noticed a HUGE difference in the air quality. Me & my 2 young sons suffer immensely with allergies & I believe our HVAC system & duct work are contaminated with mold so it’s been keeping us all sick, in the meantime until we move this has been helping us breathe & making us feel better. I really cannot recommend this air purifier enough. It’s quiet, not too small or too big, I love that the filter is washable, it’s easy to maintain, it is very effective! And I really love that I can control it from my phone, so if we are out & about I can turn it on & have it ready by the time we get home. My cat Sushi also seems to like it as he has allergies as well, and it has helped him greatly. We just leave it on & let it run all the time. It also does not run up the electric bill which is a HUGE plus! If you are debating on which air purifier to get, THIS IS THE ONE!! You will not be disappointed! We absolutely love ours! It is worth every penny!

Customer Review: I absolutely love this air purifier! The LEVOIT Air Purifier works incredibly well and easily covers a very large area in my home. One of the best things about it is how quiet it is—most of the time I can’t even tell it’s running. It’s perfect for keeping the air clean without any distracting noise.The design is beautiful and modern, so it actually looks nice sitting in the room instead of being an eyesore. It’s also lightweight, which makes it easy to move from room to room if needed.Another great feature is that it connects to my phone, so I can control it remotely and adjust settings whenever I want. Setup was quick and the app is very easy to use.Overall, this purifier is powerful, quiet, easy to use, and great for large spaces. I’m really impressed with the performance and would definitely recommend it to anyone looking for a high-quality air purifier.