Smart Air(AKA Smart Health) Sqair Air Purifier|H13 HEPA &Activated Carbon| Cleans up to 900 sq ft/30 mins, 23-52 dB| For Home, Bedroom, Office, Kitchen|Reduces Allergies, Smoke, Dust, Pet Odors

We purchased two of these after researching single room air purifiers with high flow rates per dollar. Filters are reasonably affordable and last a year. The flow rate is really impressive and the sound is soothing (we run one while we sleep). It's hard to measure air purification in most contexts, but we do have a air quality sensor that shows a relatively quick drop in particulates when the fan is running. I love that the controls is a simple analog dial. There's nothing lit up flashing in our room at night nor are there a menu or options we're unlikely to use; just 3 speed options + off on a rotary dial. Nice and simple. Perfect.

I have 3 of these now in my apartment. Took months of research and sending back a few other brands, to find the crem de la crem. This has the most simplistic features and it's actually cool that they have an oldschool dial to it. One reviewer complained about it, but that's what keeps the EMF emitted from this purifier very low. When electronics have fancy panels and LED buttons, the EMF radiation emitted is very high and not good for your living environment. These push a good amount of air for the size of them. They use PET/Polypropelene filters and not fiberblass like a lot of companies, so you don't have to worry about harmful glass particles shedding over time and getting back into your air. The particles that would maybe fall off are not harmful to the lungs. These use a Hepa 11 filter, but that's because you can push more air through them. They still filter the same as a HEPA 13 down to .01 microns, but the efficiency is 95% first pass as opposed to 99.7% I believe. I run mine on setting 2 as it will filter better by not rushing air too fast through it. Not to mention setting 3 is a tad too loud. Setting 1 does nothing and should never be run on it.My only suggestion is if they increased the wattage used on setting 1 so it actually moved a tad more air, yet stayed quiet. And if they added one more setting and made it 4 settings total would be absolutely perfect. Setting 3 now should be where setting 4 is in the future. And the new setting 3 should be slightly faster than setting 2 now. Overall though you won't find a better purifier for a 500sq ft. space. This thing destroys what's on the market. Another reviewer mentioned setting 2 being too loud. I don't think so at all. I could be right next to this and make a phone call easily and I doubt the person on the other line would hear too much wind noise.I was buying these from China before they became available on here. Had to annoy them on Instagram to get them to put these for sale here in the US, because shipping will deter tons of buyers. And walla! They are now up for grabs. Thanks Smart Air. Your team puts insane amounts of dedication to studying air pollution and how to have the safest, most effective products. Not to mention the EMF that's emitted from the Smart Health is very very low. Surprised you don't market that. Most other purifiers will hit you with higher Electro Magnetic Fields. Maybe one other edition would be shielding the electric cable with aluminum foil on the inside so this puts out almost no EMF. But hey, I'll take what you guys have!

I have run Smart Health Model S in my office for a couple of weeks now and have already colleagues asking me about it. I have followed Smart Health’s research on indoor air quality for a while, including their research on DIY air purifiers and tests of various HEPA filters, but decided to wait until this model was available on Amazon, for cheaper US shipping.Ultimately an air purifier is just a fan next to an air filter. Some air purifiers try to make this more complicated than it should be, with inscrutable controls and questionable features. The Model S has a simple dial with an “off” and three “on” speed speed settings. There is a carbon filter for odors and VOCs, and a traditional HEPA filter. All this in a great design that looks like an attractive piece of furniture and not an oversize gadget.I measured the wind speed with an anemometer and tested the purification with a PM sensor. I’m satisfied with the results in my relatively small office, and I think it would be fine in a smaller bedroom, but I don’t know how it would perform in a larger space. This model is probably too small for a larger living room.The three fixed speeds keep it simple, and having just three speeds is common for air purifiers. Most of the time, I keep mine on speed 2, and sometimes lower it to speed 1 if I find it too loud. Speed 3 is quite loud and I would only use that if it’s particularly dusty or I want to clean the air quickly. The one thing I wish for is a speed between 2 and 3.I haven’t had to change the filter yet. It’s done by holding down two handles on the left and right sides, and lifting the top of the unit which contains the fan. It’s easier than it sounds. The handle mechanism (see photo) is quite well designed. Inside, you’ll see the HEPA filter, and the carbon filter below it.Unlike some other air purifiers I own, the plastic on this model has a surface that doesn’t appear to attract much dust itself, which is a bad quality in an air purifier.

There isn't much that is special about this air filter. I believe the design allows air to draw in from the bottom and it keeps the room air circulating, but the wide footprint takes up more room than an air filter needs to. The fan could have been a blower style with a slimmer design. This thing is built well but doesn't feel like a good value at the current price of $180.00 I would have kept it if it was $140