1. CADR is really low to the point where the unit is near useless due to #2
2. In addition to a low CADR, it has the highest noise. It looks and sounds like a jet engine when you have this thing on high, which is needed due to the low CADR. This is the loudest air purifier that I’ve ever owned
3. If you get a defective main filter, the unit will emit an unpleasant metallic smell. I haven’t tested the particles yet but I doubt the air is clean.
4. Unlike other smart air cleaners in the same price range, it’s app and smart features don’t work. You can’t even create a schedule for it
After reading this article when it was posted in 2022 and the author's other post on particulates[0] I bought the sqair[1], which we are very happy with. Allergies and morning congestion are nearly 0 after using it. We live on a very busy road so I run it all the time and with the carbon filter as well. I would like to get a second one eventually -- it only cleans 430 sqft of air and our condo is 730.
I have a bunch of air filters (I live in the bay area during fire season).
Coway Air Mega
Coway Mighty
Blue Air
Medify Air
They're basically all equivalent and they all work.
The reason I like the Medifyair is because it can move the largest volume of air relative to those so it can clear a space quickly (and quietly). I also think it looks nice (though it is huge).
Of the rest, the Blue Air uses weird custom filters which I think cost a little more (though I haven't had to replace them yet). The Coway Mighty is also pretty small and mostly for a tiny room.
Relatedly, if you're interested in sensors I think the TemTop sensors are the best (I've tried a bunch of different ones, and a lot of them suck).
I personally own a 1008-DH, which has much better filtration than the 1512 reviewed there.
Previous reviews at The Sweet Home also analyzed IQAir, which is probably even better as it filters particles down to ~0.1 microns. I'd love to see an unbiased review testing ultra-small particles.
I know the HN Crowd cohorts one of the smartest and most tech-savvy communities. And I want you and me to breathe only the best air. Since, probably most of us are in the home-office, we need to take care of our well-being here too. In the office you have nice air-conditioning, but at home? Most of us, especially in Europe (Germany specifically for me) don't have AC and I think it's first of all too expensive and also very wasteful with electricity.
That's why I'd love to ask you wonderful people what you're using and recommending, when it comes to Air-Filtration/Cleaning systems.
Let's be honest Air conditioning (AC) devices are horribly inefficient. They are chunky, loud and use decades old technology. A "simple" compressor to just "cool" air + optional HEPA filter is not suitable for most of us for multiple reasons. Also it uses so much energy that it's environmentally not acceptable for me to use up 1-6kW/h for just cooling the room temperature.
That's why I'm looking to buy an improvement over a regular Fan. Something that is smart and can be controlled with the smartphone too. But there are so many devices and in such wild price categories that I hope to find an answer with your help for all of us.
Summer is coming and most of us are expecting new heat-waves too, including lots of pollen, dirty air, dust and funghi/viruses/bacteria. I have no connnection with them, but something like https://www.leitz.com/de-de/design--serien/trusens-luftreiniger/ but with smart-home capabilities in an acceptable price-range that most of us can afford would be great!
What are your suggestions for a device that cleans the air in the home-office (15-80 sqm)? Some of us have very little, others generous rooms, but the recommendation should work well with room-sizes up to 80sqm and even better with smaller room sizes.
I think an UV-C lamp killing germs, a HEPA filter for dust and dirt, an ozone-free ionisator to clean the air should be essential. Sorry if this is too naive, I'm a novice in this field, that's why I'm asking for your help.
Depends if you want to build your own or not [1]. If not, I think purpleair is the way to go (I use the same sensor as them but they have two I believe for redundancy). As for air purifier, I highly recommend Blueair. They’re expensive but was the only purifier I had that managed to pull the PM2.5 indoors to near 0 during this terrible wildfire season in California.
I've done so much research about air purifiers that I think I could do a thesis if I were in academia. The vast majority of these devices fall under one category: rubbish. Lots of gimmicks performed when it comes to efficacy. Bending reality with borderline claims or inventing useless terms that mean nothing.
If you are serious about indoor air quality, start with IQAir. Their products are bulky, contain multiple filters and you know that you'll be able to get replacement filters 5 years later.
Blueair has some reasonable products too (ignore the smaller, cheap product lines).
Smart Air is a whole company built around a super cheap HEPA-on-a-fan, started by foreigners in China. They still sell their old DIY1.1 model for $35 shipped (in Mainland). I own and love their filters, although I miss the «smart» features of their competitors.
based on wirecutter's own test results a few years ago, the blue air 211+ air purifier had the best performance by a good margin, but they wouldn't recommend it, for at least 2 years after i bought it, though they later did so, briefly. this was likely to maximize their revenue rather than provide the best recommendation. hard to trust them after that.
I bought sqair from https://smartairfilters.com/en/ and it's same principle. One of them keeps my 700sq ft village flat clean. First year my daughter doesn't need doses of siflex at night.
Can with a HEPA filter is good either as proven by an article shared on HN about 6 months back.
HEPA-type air purifiers are increasingly laden with features that add no value, like poor air quality sensors, wifi connections for Alexa/Google assistant, ozone generators that everyone says to disable, bright lights and LED displays, and proprietary filters.
The Clean Air Kits products use commodity parts with as few electronics as necessary, and operate in the way that most people recommend: non-interactively and continuously running at a single speed. They are physically smaller, quieter, and use less power than the other commercial air purifiers.
The cheap IKEA air purifier has another huge benefit: you can control it with a smart socket. So hook it up to a tasmota smart plug and you will have a smart purifier.
If you’re looking for an air purifier, the Honeywell HPA300 ($200) is more than enough four our three bedroom house (despite the 465sq ft rating).
I want to be able to recommend the Bissell Air400, as it is quieter, has a built in PM 2.5 meter, auto adjusts to pollutants, and the filter works at least as well.
Unfortunately, it randomly turns itself off. This seems to be a design flaw, as many other people report the same thing. Also, it doesn’t seem to use a PID control loop to set fan speed, so the automatic speed controller sets itself far too low for our house. On the bright side, it is frequently on sale for 50%+ off, since it has a terrible reputation.
In practice, I leave the honeywell on, and use the bissell if there’s a problem (cooking smoke, allergies, wildfires, etc). In tandem, the two are able to lower PM 2.5 by over 90%, which is more than enough for fire season.
Edit: In hindsight, I would have bought the HPA 300, and a standalone sensor like the ones from purple air.
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