Lasko Air Flex 20" 2-in-1 Box Fan and Air Purifier in One with MERV10 Air Purifying Filter for Cleaner and Cooling Breeze, 3 Speeds, Steel Body, FF305

It's exactly what I wanted and we take the filter off to use it as a window fan at night for cold air or just to blow a lot of air. People concerned about an air tight seal and stuff are a bit crazy.. the build quality is superb.

I think of this more as an "air purifier/filter" than a "fan." I wouldn't expect amazing airflow compared to similar sized fans. This is totally different though!This is an "air purifier/filter" for people who aren't too concerned with appearance, size, or noise, and just want a basic air purifier that has EASY TO REPLACE filters. None of that B.S. where you have to buy one company's specific model XYZ-123 filter, which is outrageously priced and they will discontinue in a few years. With these, you can get a generic replacement filter at the supermarket or hardware store.I saw one review mentioning that the bottom is only held together with a blue piece of tape. I saw mine was shipped the same way and was worried until I read the instructions. There are two plastic feet that clamp onto the bottom, but mine were wrapped up in the top piece of cardboard. So don't throw that out without fishing out the feet.How did I decide on this particular model? The main reason is the easy to replace filters. I did some research on DIY box fan + air filter air purifiers, and Lasko happened to reveal this product at the same time. If you want something that looks different, try Etsy... they make wooden cases to hold together box fans and filters, but I doubt they reengineer the fan to better handle the load put on it by the air filter.That's pretty much it, but you can read on if you want to hear my very limited experience with DIY fan + air filter purifiers.------------------------------Last fall, with the wildfire and coronavirus events in the US, I began researching different air purifiers, including DIY box fan air purifiers.I have several parrots and was moving into a new place. Birds have a very sensitive respiratory system, and certain gases and airborne things can easily kill them. Birds also produce a lot of feather dust. I'd also been experiencing ongoing allergies (not bird related), and first decided upgrade my home furnace a/c filters with a higher rating. (My family had always just bought cheap ones). That made such a difference! I stopped waking up with a runny or congested nose, and with a dry / sore throat. So I looked into air purifiers again, specifically for the area where the birds are. Due to the aforementioned events, many of the top rated ones were sold out!I saw a video somewhere of DIY box fan + filter air purifier, and started googling. One potential issue with the box fan air purifiers is that adding the filter puts more resistance (I think is the term) on the fan blades, making the engine work harder, and potentially reducing the lifespan of the fan. (Plus it might be a safety issue?)I tried making a DIY air purifier out of a basic (non-box) table top fan + a highly rated HEPA filter. Hahaha. The filter was a slightly smaller size than the front face of the fan, and so most of the air just went around the filter. I could also hear the difference in the fan... it was working much harder. I read somewhere else that if you have a long air column (cylinder) between the fan blades and the filter, it helps because it builds up pressure or something. So I bought a lampshade, set it on the fan's face, and put the filter on the other side of that. It worked better, and air went through the filter.. barely. But it did pass through! I set a tissue on the filter and it would hover and slide off, like an air hockey table. The contraption looked ridiculous, and I was about to buy a box fan to make a new DIY purifier, when I came across this on Lasko's website.I was thrilled! Until I saw that it had not been released yet. (This was in September). I am glad that I finally was able to snag one of these. Great design that addresses so many issues the DIY box fan + filter air purifiers brought up. Thanks Lasko

Works great, you have to make sure you set it up in an area that already has airflow to get the best use of it. The fan itself doesn't generate much airflow (specifically due to how it's designed) so trying to get this to force air through an area isn't going to work.I do wish they had made more of a gap between the filter and the fan area, custom made filter setups that i've seen have more airflow than this, but are much larger in size due to having a large triangular box attached to the back along with two filters, so the space this takes up relative to the airflow is fine

Love these box fans for New England when we open up again from the winter. They help keep the pollen in check and circulate the air nicely. Have several and they are durable.

My first impression of this fan was pulling it out the box and realizing the switch on top hadn't been installed properly. It was pushed in. So, instead of my first experience being me simply using the box fan I just paid OVER $60 FOR, I had to get out my tools and take the thing apart so I could clip the switch into place properly.On top of this, the thing is just simply poorly made. The rear screen wasn't screwed on properly, they hadn't even put the screws through half of the holes, but through the plastic instead, because the holes don't line up. It amazes me just how much quality has gone downhill on top of prices skyrocketing.If I could give anyone advice, unless you just simply don't feel like fussing around with it, and you have the extra money, avoid this fan. Just buy a twenty or thirty dollar box fan, and search here on Amazon for "plastic corner trim". You can just double-sided tape this plastic trim right on to the back of any fan so that it's angled in a way that you can slide a filter into. Et Voilà, you've made an air purifier for half the price, and if you used a Genesis fan, with a better made product, too.Lasko went downhill, and yet they still charge a premium for this junk. The only reason it gets 3 stars is because it's convenient. But there's no way in Hades this should cost so much..

Used it for a couple of weeks now and it works well. I have severe asthma and spring is awful. But, this little (and loud) guy really cleans the air. I put it in the family room under a vent and it provides some white noise while we sleep; and seems to really clean the air.

Works great