LaskoAir 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

Absolutely love this! You can save yourself hundreds by choosing this instead of an expensive air purifier that doesn’t work as well. The DIY purified box fan is effective, but this one looks much better in your space.As for noise, it’s about as loud as a typical box fan—noticeable at first, but it quickly fades into background white noise.

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

A more elegant alternative to taping a filter to a box fan, it does work but is a bit overpriced as the fan itself is a very basic box fan. I'm knocking off a star because it isn't a great value.It is not as quiet as an air purifier but the fan does not rattle and shake. So far the included filter has been doing a good job of collecting dust and pet hair.As others have noted, the filter does restrict the airflow so it is not that effective in cooling, which is fine with me since I'm looking more for purification.If it were $50 I might get a second one.

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.

Quiet and provide plenty of air circulation with filtered air. It wobbles on any speed , and I'm thinking of returning it before it vibrates apart.

This only arrived yesterday so I may need to update this, but, based on this limited experience I can already tell what a lot of writers of negative reviews seem to fail to understand. This is not an air purifier AND a fan, it's an air purifier OR a fan. That's a subtle, yet significant difference.Take the filter out, it's a fan, and quite a forceful one.Put the filter in, it's an air purifier, and not a fan. Thus all the people complaining about a lack of air flow I can only say either take the filter out or adjust your unreasonable expectations. Of course the air flow is significantly less if you put a MERV 10 or higher filter in there. It would be weird if the filter didn't have that effect.Having said that, there is still considerable air flow with the filter in it so I don't know where the complaints are based on that claim there is almost no discernable air flow when the filter is in. Perhaps your filter is old and completely clogged up?Is it loud? That depends on its location. In my case, I use it in my garage either as a fan with hot weather or to ventilate after a painting project, or, after wood sawing, as an air purifier. In that location, the volume of the thing does not exceed my expectations. If you put this in your bedroom while you're trying to sleep, well, there are better products on the market for that purpose.My guess is this thing was developed with shopworkers in mind who were MacGyvering filters with ducttape to a box fan and burning up the fan. With that purpose in mind, I think this thing is perfect. In fact, it's how I found it after watching a few of those DIY videos on YouTube. The thought occurred "might there be a box fan with a built-in filter available?" Lo and behold, there is one. This is it folks.You can't water ski with it either, but that doesn't justifiy anything less than five stars.UPDATE: May 2023. I've had this fantastic fan for two years now and it is exactly as I described on day two when I wrote the above review. At one point I broke one of the feet of the fan, but learned you can actually order a replacement for it for something like $8. This thing really proves its value when using my table saw. I have a shopvac hooked up to the table saw, I use my table saw on the edge of my garage, and then I use the fan (without filter) to blow from behind me to ensure no sawdust gets into the garage. This works great. When it's too cold to open the garage door, I hang the fan (with filter this time) on a hook from the garage door rails, and let it do its thing for an hour after I'm done. The random rocking left to right from the fan on the hook ensures that all the air in the garage has gone through the filter at least once, and all the fine particles have been filtered out. By now, I have replaced the original MERV 10 filter with a MERV 13 filter so it gets even smaller particles. It's great!