(aka Smart Health) Blast Mini Mk II Air Purifier for Large Rooms up to 3075 sq ft, 36-49 dBA, CARB Certified, True H13 HEPA & Activated Carbon Filters for Dust, Allergens, Pet Hair

I had first purchased a blueair 311 auto but discovered testers showed it produces Ozone! Research it. They say it doesn't "emit" Ozone but i didn't trust that as the wording on the Blueair site seemed shadey. Researching I found others had done testing and said that it had released Ozone. That scared me. So now I have this guy. It really moves air. It has three speeds. Low you cant hear it but can feel some air moving. Medium is where I usually keep it and sleep with it on med too. Makes a nice, unobtrusive white noise. High is a bit loud in the bedroom but would be fine in a bigger room or if your not trying to sleep. I got the carbon filter too and the room feels very fresh. I plan on getting a second when I can. As for the dial. I have no problem turning it. My husband is not a fan of it. Kinda like a rotary dial. If I could add one feature it would be a pre-filter because we have a cat and it would catch a lot of hair, probably extending filter life. I recommend this filter because it doesn't produce ozone or Ionize the air. (Read up on that, it's not something you want) I also got the 3 year warranty because you just never know.

Love that it has intakes on both sides. Runs silently on the 2 lowest settings and can really clear a room when you kick it up on high.

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.

the unit itself is good. Sleek and pleasing shape and button interface, low noise, easy filter changes. The fit of the plastic mesh prefilter is subpar, introducing a slight bow when installed that allows air to pass along the sides. Biggest issue is filter longevity, had the alert trigger within 3months of setup, this despite boasts of “up to 18months”. FAQ on their website says the sensor was calibrated for polluted Chinese cities so you can most likely reset it and expect many more months of use. Reset alert just went off again at 5mos. hepa pleats were in fact dark grey. charcoal filters have no way of indicating expiration so I assume they were spent as well. Replacement of the 2pair is $105. At this rate I will be spending $200+/yr to keep this unit running optimally. Just installed the Pureburg set, which includes two charcoal and two hepa -a bundle that smartair strangely doesn’t offer- for $38. It’s great that they’re a B corp but with what looks like an almost entirely China-based team, why are we paying northern european prices for what is essentially a drop shipping company?

Like others, the fan seems to be broken when it arrived. I plugged it in, turned it on, and it made a mechanical clanking noise that sounded very wrong. Discovered that the fan blade is broken on the inside.