10 Best Air Purifier Pre Filter Replacement for 2026 – Expert Quality Picks

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: “I purchased this replacement filter for my Dyson TP04, and it fits perfectly. The air quality noticeably improved, and the filter effectively captures dust and odors. Installation was straightforward, and the filter seems durable.”

Customer Review: “Great filter for my Dyson purifier! It traps all the allergens and pet odors. I appreciate the activated carbon layer for odor control. Definitely recommend this for Dyson owners.”

Customer Review: “It fits the air doctor perfectly. Another thing about this particular set is the carbon filter is jammed packed with carbon just like the air doctor brand name filter. Some of the other cheaper versions are not. So far after two weeks of use it seems to be performing just the OEM version filter.”

Customer Review: “When I ordered this I expected the thickness of the white filter to be the same as the air doctor ones. I will say the white one is not as thick but does still fit into the machine. The external filters that you put onto the outside are thicker than the normal ones.”

Customer Review: “The Honeywell HEPA Air Purifier Filter is a top-tier product that delivers exceptional air quality and performance. I recently replaced my old filter with this one, and the improvement in air freshness and cleanliness is remarkable. The HEPA filter does an excellent job at capturing airborne particles, including dust, pollen, pet dander, and even smoke. I can definitely tell the difference in the air quality in my home—it feels fresher and more breathable. It’s perfect for anyone with allergies or respiratory issues. Installation was straightforward and hassle-free, and the filter fits perfectly into my Honeywell air purifier. The build quality is impressive, and the filter seems durable and long-lasting. What I also appreciate is the noticeable reduction in allergens and odors, making my home a more comfortable and healthier environment. The filter is highly effective and provides excellent value for its price. If you’re looking for a reliable and high-performing air purifier filter, the Honeywell HEPA Air Purifier Filter R is an outstanding choice. Highly recommended for its efficiency, ease of use, and noticeable improvement in air quality!”

Customer Review: “These filters work great. Makes me think the one’s I purchased from somewhere else were counterfeit because with these filters there is no dust on the grates and with the other one’s there was a ton of dust. Also I have allergies and I can breath again like when I bought this air purifier new.”

Customer Review: “Fits perfect, and does an outstanding job filtering.”

Customer Review: “These filters were supposed to be HP filters. They turned out to be cheap Chinese knockoffs.”

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 find that the honeywell remnant removed just about any source of odor I put in front of it while the aftermarket had no effect 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: “The filter themselves are great and fit my air purifier perfectly. However, I’m glad they were shipped inside a bigger box with other items, because they are packaged only in thin cheap plastic. If they had been shipped by themselves they probably would have gotten damaged or folded somewhere, which would have made fitting them into the slot where they go a lot more difficult.”

Customer Review: “I really like these filters as they do a wonderful job in my air purifiers. The quality of these filters are awesome as they really seem to clean the air in our house. Our house seems to have more dust than any other house we have ever lived in so I bought several air purifiers and when I’m out of filters these are my go to filters as I’m always looking for the best price but yet great quality. So I will be buying these again in the near future as our air purifiers do actually need the filters changed before the recommendation because our house has so much dust from being an old Victorian house & also it’s under construction so we have that dirt & dust also, and not to mention we also have three dogs that shed like crazy.”

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: “This kit has all of the filters necessary for a complete replacement of the air purifier filters – the prefilters and the HEPA filters. There is enough for a year.”

Customer Review: “I live in a really dusty area. Due to this, I can’t let my filters go past the manufacturer’s recommended swap out timeframes of three months for the pre-filters and a year for the HEPA. Before finding this kit, I was buying the pre-filters and HEPA’s al a carte. The pre-filters I was buying were the Honeywell Type A+ pre-filter (HRF-APP1V1) and they were a pain to work with. They’re a large cut of the Type A+ filter and you have to trim it down to fit your filtration unit. They’re also thinner and more translucent than the one that comes with a new air purifier. Making them annoying to install. This kit comes with four pre-filters and all three rectangular HEPA filters for the HPA3300, which is a full year of service. The pre-filters are like the ones that come with the new purifiers. They’re dense and precut, which makes them easy to install. My only issue is the price on these. They’re name brand and do a great job, but they are just paper and cloth in the end.”

Customer Review: “These filter are just as good as the original ones that came with the appliance. They are well made, work well, and many months as you would expect. I have purchased these a couple times now already.”

Customer Review: “They were the wrong size. I didn’t read the description. It’s my fault. But I can cut them to fit.”