--- product_id: 77134494 title: "Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA" brand: "pollentec" price: "14.29 DT" currency: TND in_stock: false reviews_count: 6 url: https://www.desertcart.tn/products/77134494-box-fan-air-purifier-filter-for-cleaner-air-and-cooling store_origin: TN region: Tunisia --- # Washable & reusable 20.5" x 20.5" size Made in the USA Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA **Brand:** pollentec **Price:** 14.29 DT **Availability:** ❌ Out of Stock ## Summary > 🌟 Elevate your air quality game with style! ## Quick Answers - **What is this?** Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA by pollentec - **How much does it cost?** 14.29 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/77134494-box-fan-air-purifier-filter-for-cleaner-air-and-cooling) ## Best For - pollentec enthusiasts ## Why This Product - Trusted pollentec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Perfect Fit:** Designed for Mainstays FB50-16HB for optimal performance. - • **Breathe Easy:** Transform your space with cleaner air! - • **Longevity Boost:** Protect your fan and extend its life with our filter. - • **Quality Assurance:** Crafted in the USA with a hassle-free return policy. - • **Eco-Friendly Savings:** Reusable filters save you money and the planet! ## Overview The Box Fan Air Purifier Filter is a washable and reusable solution designed specifically for the Mainstays Box Fan Model FB50-16HB. Measuring 20.5” x 20.5”, this filter enhances air quality while extending the life of your fan. Made in the USA, it offers an eco-friendly alternative to disposable filters, ensuring cleaner air and savings for up to twelve months. ## Description Full description not available ## Features - Mainstays Box Fan Filter– Designed to fit multiple Mainstays Box fan models, these Box fan filters help to create a cleaner air in your home or office. - Extend Box Fan Longevity – Our Box fan filter helps to improve the air quality and protect your Mainstays box fan's life by reducing dirt build-up on the fan blade covers. - Washable and Reusable for Maximum Value – Unlike disposable box fan air filters that get dirty and end up in landfills, our air filters can be removed, spray cleaned, dried, and reused for twelve months saves you money. - Mainstays Compatibility: Pollentec box fan air filters are designed for Mainstays Box Fan Model FB50-16HB. They provide a precision OEM fit for optimal performance. - Unbeatable Pollentec Quality: Crafted right here in the USA and backed by our no-hassle return and replacement policy, our tower air filter solutions are highly efficient, easy to use, and improve air quality day-in and day-out. ## Product Details - **Brand:** Pollentec - **Material:** Mesh - **Compatible Devices:** Air Purifier - **UPC:** 696576743757 - **Unit Count:** 1 Count ## Images ![Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA - Image 1](https://m.media-amazon.com/images/I/81b8gaLJhxL.jpg) ![Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA - Image 2](https://m.media-amazon.com/images/I/61uu+bISbOS.jpg) ![Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA - Image 3](https://m.media-amazon.com/images/I/91ycRHNNe-L.jpg) ![Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA - Image 4](https://m.media-amazon.com/images/I/71NpzSe4NkL.jpg) ![Box Fan Air Purifier Filter for Cleaner Air and a Cooling Breeze Washable, Reusable, Compatible with Mainstays Box Fan Model FB50-16HB Frame & Filter size 20.5” x 20.5” Made in the USA - Image 5](https://m.media-amazon.com/images/I/81RnZBiWIWL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Made to last, and passes the test! *by P***M on Reviewed in the United States on December 4, 2017* 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! ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars I wasn’t sure this would work for my sons room ... *by M***A on Reviewed in the United States on May 6, 2018* 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! ### ⭐⭐⭐⭐ 4.0 out of 5 stars Good but does not filter as well as furnance filter *by J***T on Reviewed in the United States on June 22, 2017* Fits the fan perfectly. Lasko20 in. Power Plus Box Fan I got at home depot. The challenge with this filter is it is not as fine as a pleated furnance filter. Thus, if you want better filtration then you will need to go the furnance filter route. Either by the product that supports use of furnance filter or duct tape a 20x20 one onto the back of fan. Just realize the more you use you have to replace those at a added cost and probably harder on fan motor to pull the air threw as it clogs up. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/77134494-box-fan-air-purifier-filter-for-cleaner-air-and-cooling](https://www.desertcart.tn/products/77134494-box-fan-air-purifier-filter-for-cleaner-air-and-cooling) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-05*