Why The Sqair will transform the market for clean air

The Sqair Smart Air Purifier

In 2013, I made a DIY purifier to get through an apocalyptic Beijing winter.

Beijing air pollution airpocalypse example


The DIY wasn’t pretty, but it worked. Hundreds of days of tests showed it cut tiny 0.5 micron particles in my bedroom by an average of 84% (1, 2, 3).


The DIY proved that air purifiers don’t have to cost $1,000. But now I have something way better. Meet The Sqair.

Meet The Sqair air purifier


Why The Sqair is an amazing air purifier

The Sqair is the most cost-effective purifier in the world. Really.  

I should admit I’m NOT an expert in air pollution. Yes, I’m a PhD-carrying professor, but I study social psychology, not fluid dynamics.

However, I understand data, and this machine provides the most clean air per dollar of any major purifier on the market. Here are the numbers.

Let’s start with the cost. Pretty simple.

Sqair Cost Comparison Dollar

Now here’s how much clean air the purifiers put out (measured by cubic meters per hour in CADR tests). Other than the big boxy $2,000 IQ Air, the Sqair leads the pack.


With cost and CADR, we can calculate how much clean air you get for every dollar you spend.


It’s that simple. The Sqair puts out the most clean air per dollar of any of the major purifier brands.

But maybe it’s really noisy? 

But you might think, “OK, it’s effective, but it must be loud.” It’s actually quieter than all the others. It’s quieter than that $2,000 IQ Air, and it’s a whopping 13 decibels quieter than the market-leading Xiaomi.


OK, but maybe it hogs electricity? It actually uses less power than the expensive purifiers.

Smart Air Sqair air purifier power usage comparison with big air purifier brands


So there you have it, The Sqair air purifier in five graphs. Want to learn more, you can check out The Sqair in our stores in China, India, Philippines and more countries. Check out The Sqair here.


The Sqair air purifier Kickstarter

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Why is H11 Hepa filter(which has only 95% efficiency) used compared to other better grade HEPA filters?

In India, this ‘Out of stock – shipping begins early December’ message is displayed on product page. Do I have to place an order NOW to get a delivery early December or wait till the product is available? What exactly is ‘early December’?

I live in Delhi, I really want to buy a purifier. Please help me with these queries.


Hey Reddy, we explain why we use a H11 grade HEPA filter here: https://smartairfilters.com/en/blog/weaker-filter-stronger-purifier/ Hope you got your hands on an air purifier to help you breathe clean air this Delhi winter!


I stay in Delhi and the pollution is above harzadous level now (AQI around 300-1000) for the past one week. After alot of reading, I decided to buy the sqair and now wondering if I can run it on level 3 for almost 24 hours. Actually, with this extremely high AQI, I have no idea how to use the sqair effectively. Your suggestions would help me alot. By the way, I’m most of the time in room, very small one, around 6 metresquare. And I really appreciate the efforts and hardwork of the smart air team. The information here is… Read more »

Great to see you’ve discovered the truth that clean air doesn’t need to cost an arm and a leg Aina! The pollution levels in Delhi are toxic right now, our India team is working non-stop to help people breathe clean air. In AQI levels as high as 300 – 1000, even in a 6sqm room, I suggest you run your Sqair on Speed 3 (high). Why? Because with the outdoor levels so high, much of this PM2.5 will leak into your room. I also recommend you go round your room and try and seal up any gaps between windows or… Read more »


Two more things, as I said that I’m most of the time in my small room, just wondering if I turn it on speed 3 for like 20 hours plus a day, would the sqair be overheated. What precautions should I take?

Another thing as you suggest about sealing up gaps, I was hesitant if that would make breathing more difficult, since it is all sealed.