PollenTec Box Fan Air Filter - Effective Filtering Material for Pollen, Dust, Mold Spores and Pet Dander - Reusable Washable Design - Compatible with Mainstay Box Fan Model FB50-16HB Made USA

The fit is garbage, it doesnt look like the product advertised nor does it look like what is shown in the instructions. the rubber gasket doesnt stretch far enough to go around the layer of filter and still fit onto the fan, also th feet get in the way. What the hell guys? I purchsed the 20" Haines Box fan model along with the 20" Haines box fan which are sold as a combo here on this page. Real nice.

The challenge is to have clean air in a space that is:- 1800 sq feet- home to 2 humans and a cat- 50 yrs old, with dust from age & the continual repairs now necessary- using several expensive HEPA filter devices, with more improvement neededI purchased this filter 6 months ago. The first test is done! Question: does it capture more than a filter added to a box fan is already capturing? Answer: YES!- as shown in the photos, over time the outer filter accumulated significant dust - the grid pattern is made by the dust & particulates- also shown in the photo, this washable filter captured additional particulates that the first filter allowed to get through (in time)- the box fan was run at various speeds (it just has 3), continuously for 3 months.Is it easy to wash? Answer: YES!- It released the dirt very easily- I was able to thoroughly hand-wash it in soapy water in the sink, and rinse & hang in the shower, in about 3 minutes.Does it replace a carbon filter? Answer: NO.- Activated carbon has cleaning properties that this filter, or plain HEPA filters, do not have, such as capturing volatile organic compounds (VOCs).- VOCs are both biological (think gym shoes) and also released by paints, plasticized things like laminate floors, vinyl tiles and storage bins, etc. If you can smell it, it is a VOC.- filtering BOTH solid matter and VOCs are important for health. Some VOCs are hazardous, all solid matter is hazardous for lungs.Other thoughts:- It would make a HEPA filter last longer, yet it needs the structure of the fan and won't work with a cardboard frame.- It may work to mount this to a HEPA filter if it has a metal frame. I don't know if those are still made.- If you are interested in combining with HEPA, then you could put the HEPA on the opposite side of the fan.- As others noted, it is a tight fit to the fan, and caution must be used when removing it to keep the Velcro tabs on your fan- The tabs WILL stay, though, if you began with a clean fan, and also hold the Velcro tabs down as you remove this filter.- I suggest using a NEW fan, so there is no dirt to begin with, and cleaning the area for the Velcro with rubbing alcohol.- if the Velcro tabs still do not hold, they are replaceable from any craft / fabric store or notions department.I AM impressed! At the time that I bought this, I thought it might replace the fan-sized HEPA filters and save some money. It has done that.I hope that in the future, these might be made with the ability to insert a carbon filter right in between layers. That'd be much more attractive than my lashing of an additional filtert! In the meantime, I am happy with this configuration. It costs less, and by placing the carbon filter first I do not have to wash this one too terribly often. I can deal with this once every 6 months! Please note that in this home I am running 8 such fans in addition to using the the built-in furnace filtration, bathroom vents and oven hood. The house is also aired out frequently, and yet we still had this room to improve air quality. I expect to be starting a collection of these filters, now. I do wish that it fit on the fan a little easier, on the other hand, if air is allowed to escape a filter, then it will, so we may all need to be careful what we wish for. :D A smidgeon larger would be helpful.I hope that this review is helpful to you. It would be great if you let me know!

Seems to be doing the job so far. I will say that they filter doesn't quite flush the back of the fan like the picture. Idk if I just got a bad one or what not but it seems to be in the way of the plug and stands. Which then makes it not flush against the fan for maximum filtration. Look at my pics of you don't understand.

Amazing product! I want to give a personal thank you to the makers of this allergen filter. I was able to turn a $10 Walmart box fan into a HEPA quality filter that is large and powerful enough to clear the dust and pollen from my entire kitchen and dining area. I have filter systems that cost me well over $100 dollars that don’t do the job this system does. The best part- you can just vacuum and/or rinse the Pollentec screen! You never have to replace it! Before I was spending a ton on replacement filters that didn’t do as good of a job as this one time investment. A huge thanks from this allergy sufferer! I was so impressed I bought a roll of the screen to try on our windows during allergy season.I was not asked for this review and I paid full price for this product. I just like it this much and hope the company stays in business!

Only buy this is you're prepared to permanently have Velcro on your fan. Fan Buddy has completely changed the design of their filters. I bought one last year and was thrilled with it, so I bought another. However, the elastic strap around it is no longer rubberized, so cannot stay on your fan on its own. To manage this, they provide you Velcro--and expect that you will be ok permanently attaching it to your fan for this filter to stay on.

I wasn’t sure this would work for my sons room but after having it in the window for the be night I was APPALLED to see how well it worked at trapping pollen!! Even running it regularly out of the window it works wonders filtering dust in the air. I should have used this all along instead of wasting tons of money on air purifiers when my son was little. I’m a lifer now!!UPDATE:I’ve now run this product almost all summer with the windows closed and our AC on. Because we live in an old farmhouse, in the country, and by a state road the air is always dusty. Well... THIS THING IS AMAZING. Not only does it allow good airflow but it traps all the dust and crap, including cat dander and dog hair. I honestly have no idea why anyone would waste their money on expensive air purifiers when this is totally all you need!

I have been using this for a while now and it does seem to filter, but it doesn't fasten very well to my model of box fan "Holmes". I think if you buy this you should only use it with the recommended model of fan.

It fits well on the fan I have (Lasko #3720 20" Weather-Shield Performance Box Fan). I have no idea if it filters pollen.The air moves through the fan well, so it does not get in the way of the fan working.