Blast Air Purifier


21 in stock

The Blast FFU Air Purifier is a powerful FFU (fan-filter-unit). Simple and low-cost, yet effective. The Blast FFU uses a huge fan to send high volumes of air through a large HEPA filter, giving clean air for spaces up to 130sqm.

If you want to filter VOCs and things like formaldehyde, you can also add in an (optional) carbon filter.


What’s in a Blast?

Time to change the filter?


Your Purchase Includes  1x Blast (includes 1x Blast Air Purifier and 1 x HEPA Filter), 1x Wire cord, 1x Smart Air Handbook
Colour  White
CADR (m3/h) 507 – 680 – 890 (low – mid – high)
Sound (dB) 37.9 – 43.3 – 48 (low – mid – high)
Power Consumption (W) 64 – 88 (low – high)
Power Supply 220 – 240V/50-60Hz/ Plug type:
Recommended Room Size (m2) Up to 130
Dimensions L x W x H (cm)  57.5 x 33 x 123
Product Manual Click to view the Smart Air Blast Manual



9 reviews for Blast Air Purifier

  1. timothy.percevecz (verified owner)

    Love it!
    To say the least. As a new ex pat in China, buying an air purifier could have been a real headache, but Smart Air helped immensely. I did my research and it made sense to choose SmartAir. It arrived quickly as it had to be shipped. A couple of days after using it a friend with an egg that reads air quality stopped by and honestly, I was concerned. Even told my wife perhaps we are better off not knowing because if we don’t like the results, what could we do?
    That wasn’t a worry because the results were better than expected. Phew.
    I know quite a few people who have bough purifiers since they moved here and I am 100% confident I made the best decision to purchase from Smartair. Some who already bough a purifier are considering buying a SmartAir because their more expensive machines are not cleaning their air nearly as well.

  2. Ak (verified owner)

    Strong but…LOUD.

    I wanted to love this unit but overall I am disappointed and give it 2 stars. The Blast cleans the air very well but it is not quiet. I have a small, 2 bedroom apartment in Dalian, China and bought the Blast specifically thinking I can run it on low (quiet) mode. But there is a big problem.

    The Blast produces an annoyingly loud, electrical buzzing sound. How loud? It is very audible at low speed. For me and my wife, the buzzing is too loud to run the Blast at the low speed (quietest) setting, which is why we bought the filter. It is a shame because the fan speed at low is quiet but the buzzing is intolerable. If you have the TV or music on all the time (meaning you sleep with one of them on) its probably ok but we like quiet so no go. At medium speed, the fan does a pretty good job of hiding the sound of the buzzing. I can tolerate it at medium but if you are sensitive to noise pollution it will probably bother you. The fan at medium is a bit loud. Depending on your acoustics and lifestyle (ie you like a quiet house, you have many hard surfaces) you may not like it. At high you can’t hear the buzzing but for our size apartment that is too loud. Moreover, we bought the Blast specifically for the low/quiet mode. In short, if you buy this and you don’t like a buzzing electrical sound (and have an otherwise quiet place – meaning you aren’t always watching TV or listening to music), plan to run it at medium or high. Another problem related to the noise: I can’t run this in a 14 sq meter room with the door closed because at medium it creates too much circulation and at low I hear the irritating, buzzing, electrical sound. For a single bedroom that is 15 sq meters this unit is too strong unless you can tolerate the low speed buzzing sound.

    Perhaps I have a defective unit. If not, I am unhappy with this unit and feel the claims of it being quiet are misleading. SmartAir does a great job of being transparent, which is a rare thing, but in terms of full disclosure on noise for this item they dropped the ball unless, of course, I have a defective unit and they can replace it (then I would be thrilled and give this 10 stars). If I knew this about the product, I would have kept looking or maybe bought the mini Blast. At the moment, I sort of feel cheated. I invite Smart Air to fix this problem and, in the meantime, inform customers about this issue.

    What about the air quality? On the upside, the filter a superb job of cleaning the air. I don’t have a particle counter but my lungs want to take a deep breath for the first time since I’ve been in China. Note: I don’t have the carbon filter because Dalian air is bad due to PM (not gases) and I don’t have new furniture/fixtures, etc so no off-gas.

    I find the unit costly at 1,980 yuan (~$310). It is the same as competition except for the Xiaomi, which I didn’t consider because it is too loud. But I wish SmartAir was pushing the envelope on price for all their units and not just the DIY option.

    It is bulky and heavy but comes with great wheels and it looks pretty nice. It also sports a quality electrical cable but I wish the cable was a couple feet longer.

    • Paddy Robertson

      Hi AK, Paddy here from the Smart Air office in Beijing! Thanks for writing the long review and giving us all this useful info. It sounds like your biggest concern with the Blast is with the noise levels. All air purifiers have motors in them, which are what typically give off the most noise. If a purifier seems to be totally silent (like some purifiers when in sleep mode) then it probably means it isn’t doing anything to clean your air. We tested the Blast in 2 different labs for noise, and the numbers above show it’s much quieter than other purifiers out there. Having said that, everybody has different perceptions of noise and some people are more sensitive, if the noise is really a problem then it might be hard finding something that will work right for you. We run 2 Blasts in the Smart Air office constantly, and it doesn’t affect our work. In fact we all like the ‘whooshing’ noise – it reminds us we’re breathing clean air!

      Whether or not the Blast pushes the envelope on pricing can be answered by looking at the cost per effectiveness of this purifier compared to other purifiers. The ‘bang for your buck’ of this machine is still much much higher than other similarly priced machines (we’ve worked hard to pack as big a HEPA as possible into the machine whilst still keeping the costs down). Similarly priced machines may only have a CADR in the range of 300-400cbm/hr, whereas the Blast has a CADR of 890cbm/hr. We also did make a conscious decision when designing the Blasts to go for a better finish and higher quality than previously (for example, coating the whole machine in white paint as opposed to leaving parts as ‘bare metal’, or sourcing a bigger/more effective HEPA filter and carbon material). These things have definitely brought the costs of the machine up, but we did work very hard to get the balance between cost and quality right for the Blasts.

  3. Ak (verified owner)

    Awesome reply. My wife and I are so happy. We are tickled pink that we this unit will be truly silent! It is a sign of what I felt to be true about SmartAir. Mistakes happen so its the response that is the measure of character. A company that quickly takes responsibility for mistakes is rare and commendable. Regarding pricing: I appreciate the detailed response.

  4. AH (verified owner)

    Overall, we are satisfied, and this Blast clears air really well. Its a good product. but this is nowhere near “really quiet” or “hardly notice the Blast when running it”.

    The first one, we could hear high tone buzzing sound, and sent an email about it. someone from the company said he went ahead and shipped a new one to us. fair enough. It arrived the next day.

    I am not sure if this the norm, but the current one is not so quiet either. Same as the poster above, we also have small 2 bedroom apartment. If you play music or watch TV all the time, or your apartment is really big, maybe? but I wouldnt describe this as “quiet”. I think its misleading to say that. We have 6! other purifiers, and this is the biggest and loudest among all when its at low and mid setting.(when its at high, its pretty quiet compare to others)

    I would like to mention that, If you are okay with Chinese language, probably better to buy smartair products through taobao. I bought it from this website. It took time for me to get a reply by email, wasnt sure where to contact. called the number listed on the website, they first couldn’t locate my order, and I was bit worried. taobao is more straight forward about where to contact, order#, when it will be shipped.

    • Paddy Robertson

      Paddy here again, from the Smart Air Beijing office. A very small number of Blasts in our first batch (produced in 2017) had issues with the electrical buzz of the motors. We’ve since fixed this, and I’m pleased to say that the newest machines coming off the production line no longer have this problem. I’m sorry you were one of the unfortunately users to get a Blast with this issue, but we’ll always do our best to fix the issue for you!

      You’re right that if you’re comfortable with Chinese, Taobao is certainly the simpler, most convenient way for getting hold of a Blast! Our English site is for those who’s Chinese isn’t perhaps as expert as yours! Also, I’m happy to say that we’ve got a new team member (Liz) on the team who manages all our emails from within China, so responses to emails should be much much speedier than before!

      Breath safe

  5. Carlos

    I strongly suggest to include a lower speed mode which makes less than 30db. Having a minimum mode of 38db, despite its EXCELLENT CADR, it is not very convenient to run in a bedroom or for a study room / home office while sleeping/studying/working inside that room.

    • Paddy Robertson

      Hey Carlos, Paddy here – I designed the Blast and Blast Mini. That’s a great suggestion for getting the Blast and Mini even quieter! On low, the Blast’s CADR is 507cbm/hr which you’re right – is crazy high! That’s almost 2 Xiaomi’s on their maximum speed, when they’re extremely noisy (67dB)!

      Having said that, for smaller rooms of 30-40sqm, then a CADR of 507cbm/hr is still well above what would be required (a CADR of about 300-400cbm/hr), so your option of another speed which is slightly slower and as such quieter is a great idea. I’ll look into making this a reality.

      Breath safe

  6. marcel.morgan (verified owner)

    Great service, delivered promptly before expected. Seriously notice the difference when I plugged it in and it is only summer.
    I’m not sure what everyone is talking about, referring to noise etc. the unit is pretty damn quiet…
    thanks team, I will recommend your product to other ex-pats like myself. Cheers 👍

  7. Duncan

    These are awesome. We have one in our bedroom at full blast constantly and have never considered it loud at all. We watch films fine and don’t even notice it. And we sleep in perfectly clean air… seems like a pretty good deal to me! Thanks guys!

  8. Liz (verified owner)

    We love the Blast. Our particle counter reading is now 0 or 4! A wonderful peace of mind to finally have clean air in our home in China. It is indeed a big unit so finding the space was a little tricky and the fan blows a lot of cool air so we need to turn it around when sitting near it. Will be welcomed in summer! We are not bothered by the noise definitely quieter than Xiaomi and the Smart Air Cannon.

  9. Jose

    We live in Chiang Mai Thailand, and are seriously considering two Blast units in order to deal with the horrendous burning season here.
    However, the electrical buzzing sound is a serious concern for more than a noise point of view – it could be a tell-tale sign of ozone-producing faulty or low-quality electrical components.

    Could this be a transformer issue? If not, perhaps Paddy could consider a brushless electric motor?

    • Paddy Robertson (verified owner)

      Hi Jose, thanks for writing in. We’ve actually worked really hard over the past 12 months to fix the quality issues with the Blast motors. I’m now pleased to say that the electrical buzz is fixed. It was a problem with some of our first batch of Blasts produced in 2017, and the newest Blasts coming off the production line should not have these issues. Any other questions or issues, let me know!

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