QT3 Portable Air Purifier

4.85 out of 5
(27 customer reviews)

£49.00 Price excl. VAT: £40.83

In stock

Our all-new, truly portable air purifier with HEPA filter. The small, lightweight QT3 is designed to provide you with clean and safer air wherever you go! 😀



A truly portable air purifier

The QT3 makes clean air accessible, no matter where you go. Even with its small, compact design, the QT3 packs a HEPA filter that captures nearly all pollutants on one pass.

What's more, the QT3 purifiers doesn't contain any ionisers or ozone, unlike other 'portable' purifiers on the market.

Breathe clean air on the go, all at an honest price.

Portable air purifier for travel

HEPA Filter: Captures over 95% of viruses, bacteria, PM2.5 and other dangerous pollutants

See air pollution collected in your filter (instead in your lungs) and enjoy breathing good clean air!

Portable air purifier with 800+ hours HEPA lifespan

A portable air purifier... and cooling fan

We designed the QT3 to also be an on-the-go cooling fan. While a normal fan blows dirty air into your face, the QT3 blows clean and safer air. Experience a fan that uses clean air to cool you down.

Portable air purifier that has a fan

Clean air, no limits!

The QT3 is truly portable. Small enough to be taken for travel, the QT3 allows you to breathe clean air while you are out. Enjoy clean air on the go at an incredible price.

Portable air purifier for homes, workplace, hotels and cafes

Small, but mighty,  portable air purifier

The QT3 is small enough to be placed on a small table, but powerful enough to provide a clean air stream of 1.2m.

portable air purifier for travel

Quiet operation

At just 29dB of noise on low, the QT3 provides a comfortable environment to sleep with clean, pollution-free air.

QT3 Technical Specifications

Product manual: Click to view the Smart Air QT3 manual
Battery capacity: 2000 mAh

Your Purchase IncludesIncludes 1 × QT3 travel purifier, 1 × HEPA filter, 1 × USB charger cable, 1 × QT3 product manual
ColourFresh White + Coffee
Dimensions L × W × H (mm)150 × 145 × 180
Weight (g)655
CADR (m3/h)37* (high - See FAQs why we only have high)
HEPA Lifespan3 months or 800 hrs (8 hrs a day) Beijing air
5 months or 1200 hrs (8 hrs a day) UK air**
Power Consumption9w (high)
Power Supply5v DC (USB port)
Safety CertificationsCE / C-mark / GB 4706.1-2005; GB 4706.27-2008
Noise (dBA)29 (Sp 1), 34 (Sp 2), 45 (Sp 3)
Battery Charge Time (from empty)Approx. 3 hours
Battery life (low–mid–high)Approx. 2 (high), 3 (medium) or 4 (low) hours
Warranty1 year

* Since adding the side strips to the QT3, we estimate that this reduces the CADR by 10%. In the UK, all QT3s sent out since October 2023 will have side strips inserted (see FAQs)

** The GBT 18801 standard recommends replacing HEPA filters after effectiveness drops to 50% of its initial value. Our lifespan tests were conducted in Beijing but the UK average lifespan is based W.H.O. air quality data. Our filter calculator gives you a rough guideline of lifespan based on how many hours a day you run your air purifier but note, the lifespan will vary depending on the pollution levels in your city and is based on running at top speed (it will last longer on lower speeds).

QT3 portable air purifier - FAQs

Why is there a gap between the filter and the vent?

This was originally designed for higher CADR but we listened to feedback and added two side strips to close the gap. We explain why in our QT3 blog. QT3s sent from October 22 in the UK will have the side strips already inserted. Please check when removing the poly bag or replacing the filter that these side strips don't become dislodged.

Below is a video highlighting how to insert the strips.

Please note that when inserting the filter the arrow should be on the top, ie no padding. If you put the only non-padded side of the filter at the bottom, you will have a small gap at the top corners.

If you purchased a QT3 from Smart Air UK before October 2022, please email [email protected] providing your order number and we will send you side strips. Alternatively, you can tape the filter to the front part of the QT3 using ordinary wide tape, this can stay in place until it is time to change the filter.

Can the QT3 be plugged in 24/7?

There are 2 versions of the QT3, the home and the travel. Only the travel version is available in the UK and we don’t recommend you leave it permanently plugged in. As with all rechargeable battery electronics, if you leave it permanently plugged in it will eventually impact the charge time.

Can the QT3 travel be used even after the battery is depleted and will no longer charge?

The QT3 comes with a lithium battery which is rated to last at least 300 full cycles of charging and discharging. Similar to most smart phones, we expect the battery to last 2-3 years under normal usage conditions.

After this point, the battery may not be able to hold as much charge as when it was new. However, your QT3 will still be useable when permanently plugged in.

Can I use any USB charger with the QT3 and why doesn't it come with a plug?

The QT3 comes without a plug to keep costs down for our customers worldwide. It is supplied with a 5v USB-C to USB-A cable for pairing with a plug that has a USB-A port. Since the EU ruling, USB-C will become the defacto charging cable. However, laptop cables are too powerful for the QT3 and may cause it to overheat. Always check the voltage before using any substitute cables, you should only use a 5v cable.

Should the QT3 be blowing air in my face or between me an another person?

The QT3 is a personal purifier designed with louvres to ensure the air is directed towards your face. The more air you feel on your face (dependent on speed and how close it is to you), the more filtered air you will breathe.

Why is there more air coming out of the back than at the front?

There can be a bit of air that comes out of the inlet side. Not all of the air can go through the HEPA filter in one go due to the HEPA filter's resistance, so it goes through the back. This article might also be helpful.

Is the battery on the QT3 Travel version replaceable?

Unfortunately not as it has been built into the case.

Can the QT3 Travel version be used on an airplane?

The travel version has a Lithium battery so it can only go into carry-on luggage, but please make sure to check the chosen airline's baggage policy before the flight. There should be no reason why a QT3 can't go on a plane if laptops are allowed.

Was the CADR independently tested?

We tested the QT3 in our internal lab using the same parameters used by an independent lab. We are happy to share the raw data for anyone that wants to get nerdy!

Can the QT3 Travel HEPA purifier be used to clean the air in a bedroom?

The QT3 is a portable air purifier for travel but we ran the test in our offices and it can clean the air in rooms up to 15m2, just slowly - Can the QT3 Air Purifier Clean a Whole Room? Real World Test

Will the QT3 ever have an optional H13 filter?

It's unlikely the QT3 will switch to H13, as that would drastically decrease airflow (and airspeed), hence decreasing the distance that clean air can reach from the front of the QT3.

What is the strap made from?

The QT3 strap is not genuine leather, it's made out of PU leather (plastic).

Additional information

Weight 1.2 kg
Dimensions 17.7 × 17.3 × 24.5 cm
QT3 filter

No, Yes

27 reviews for QT3 Portable Air Purifier

  1. 5 out of 5

    Yvette Roome (verified owner)

    Excellent little purifier. I have an older house with some condensation in winter - room immediately felt & smelt cleaner! There’s no actual smell from the product (apart from initially when removing from packaging) but it’s like having a bit of ozone sea air in your room

    Would recommend

  2. 5 out of 5

    Sheryl (verified owner)

    Brilliant piece of kit ~ portable, light weight and attractive.

  3. 5 out of 5

    Lorna Harrison (verified owner)

    I did a lot of research into portable HEPA filters and suddenly the decision was very easy when I came ascross Smart Air - I love how open source and honest they are, providing lots of useful information about their products and discussions around experiments they've run on them means you can really trust them, but also be well informed. They're by far the best value because their focus seems to be actually providing a service of clean air for eveyone rather than just being a business to make money.
    The QT3 is light weight, compact and quiet. I use a power bank if I need to extend the battery life for more than 2/3 hours for the eventuality it can't be plugged in. We'll be using it as an extra layer of protection against airborne disease in the office or crowded indoor spaces, or any hospital stays.
    Thank you very much for your refreshing approach as a company, I'm very pleased I came across you and made this excellent purchase!

  4. 5 out of 5

    Julie (verified owner)

    Excellent, small and silent it's rarely off!

  5. 4 out of 5

    Sally Holt (verified owner)

    There was a mix up at the warehouse which meant we received an obviously returned damaged item, but the team responded so speedily and helpfully the problem was rectified in no time. Very happy with our portable hepa which will be off for its first outing at docs tomorrow.

  6. 4 out of 5


    Works really well but the down side is the lingering smell which I think is from the mesh carry bag it was packed in. It's a great idea to have a bag but not when it has such a strong smell that it transfers to the product. The box still has a smell and the carry strap on the air purifier has a smell. I have a sensitive sense of smell so perhaps not everyone can smell it as strongly but it puts me off buying another one. Other than the smell, it seems to work well. The charge lasts a long time. I have only used it at home so far but it is nice to be able to take it with if I need to. It would easily fit in a rucksack. The charging cable has a handy storage compartment on top, with extra space for battery chargers, but they would need to be very small because there isn't much room in there. The air purifier is very easy to use. There are 3 speeds, there is a handle to angle the blades so they aim at your face and that's really all you need to know to use it.

  7. 5 out of 5

    Jade Leckey (verified owner)

    I am so happy that I discovered about these air purifiers on the Clinically Vulnerable Families Facebook group. My mother is extremely clinically vulnerable and I have a weakened immune system. We can use this compact purifier for indoor places such as essential appointments. It is good value for money. It has a handle for easy carrying and can be charged using a USB socket. It has three levels and honestly isn't noisy at all. I bought this for to reduce the risk possible reinfections of covid19, and other viruses and colds. We now use it all the time and we understand that it won't prevent getting infected with covid19, however it is an extra layer of protection along with masks etc. It also looks quite retro and cool! I am so pleased with Smart Air Uk, I am going to purchase another one of these and also a Sqair Air purifier for the kitchen. Thank you!

  8. 5 out of 5

    Himani (verified owner)

    QT3 is a very good small, quiet , lightweight filter . Used at College - classes & common room . Will be used in exam room.
    Customer Services are fantastic at Smart Air. Thank you

  9. 5 out of 5

    Sarah (verified owner)

    Very useful personal air purifier. I will use this when traveling or attending medical appointments. Quiet and very neat and will give me more confidence.

  10. 4 out of 5

    Janette (verified owner)

    Good little filter very light and I like that it’s chargeable therefore can be used anywhere. Unfortunately I caught my finger in the fan whilst moving it which broke off one of the fan blades. It still works well, but lesson learnt it didn’t hurt the finger. The cover for the charger cable is rattling loudly when it’s switched on which is very annoying I am using sellotape to rectify this which isn’t ideal. Other than these two gripes it’s a wonderful piece of kit and is brilliant for use in the car with others, medical appointments and in cafes/restaurants too.

  11. 5 out of 5

    Mad Reviewer What Reviews At Midnight (verified owner)

    The reason I bought this device, is that I want to have one HEPA filter per bedroom, in case anyone in the household gets COVID. Besides, better air quality means better thinking, as a knowledge worker who often works from home.

    Previously, I had a HEPA purifier from an obscure Chinese brand, in a make and model that isn't sold any more. It worked fine for months, but then I started getting puffy eyes after running it for a few nights in a row; the puffiness would always subside if I turned the purifier off, and ramp up if I turned the purifier on. I don't know if the problem was the device or the replacement filters, but that is not supposed to happen with a HEPA filter so something was definitely wrong.

    I would need to test the QT3 for a little longer, but so far I'm not getting any puffier from using it (which, I should hope not, but it's a data point that I'm probably not allergic to HEPA filters or suffering from some other individual quirk that could distort my user experience).

    The good thing about the QT3 is that it's affordable - it was cheaper than any others I'd been looking at - and although it's really meant for close-range use, it's been shown to purify a room the size of my own bedroom within a few hours. So, it can provide the functionality I'm looking for in the household.

    Additionally, because it's portable, if someone in the household has to go into hospital, they can take the QT3 with them, which (combined with masking) will lower their risk of airborne infection, to the extent it's within their power to do so as an individual. It's so lightweight that it can just be thrown in a bag at the last minute. And it's rechargeable.

    I've been able to run this at the lowest setting for 10-12 hours on a full charge, so that is great too. It is too big to fit in the average handbag, unfortunately, but next time I do business travel abroad, I might take the QT3 with me and also get the CO2 monitor so I can dine indoors. (The last time I travelled for business, I went to Iceland, and the wind blew my hamburger out of my hand and scattered my fries far and wide. I have never missed indoor dining as much as I did at that moment.)

    Aesthetically, the QT3 is very charming, and an actively enjoyable addition to the decor. It looks space age and retro all at the same time. It is a real accomplishment to design a utilitarian item that is fun to use, and I can't really put my finger on *what* is so delightful about it, but it *is* delightful.

    So I say, get a QT3 right away. You'll be glad you did! It is the nicest small-space air purifier you can buy.

  12. 5 out of 5


    I've now placed an order and am looking forward to receiving my second QT3 and a QP air quality monitor in due course. I bought my first QT3 last year, and I can't praise it enough. It gave us the confidence to attend health appointments and the dentist. (My husband is the CV one, but we're both taking precautions.) I'm always recommending it to other people.

  13. 5 out of 5

    Elisabeth Brown (verified owner)

    Pleased with QT3, lightweight, nice & unobtrusive looking . Bought for use on holiday in Scotland later in year which will involve train journey & restaurants. Customer services were excellent. Very speedy delivery.

  14. 5 out of 5

    Oliver (verified owner)

    Great product and great customer service as ever from SmartAir UK. Lightweight, small enough to carry around, and seems like a good amount of power. I was able to use my Qinping air quality monitor to verify that particulates are reduced to 0 right in front of the unit, and far enough away from it to realistically sit in the stream.

  15. 5 out of 5

    Linda Moore (verified owner)

    Smaller than I expected (a good thing) and virtually silent in operation. Perfect for trips to the doctors etc in addition to an FFP3. An impressive little machine!

  16. 5 out of 5

    Patricia Mattinson (verified owner)

    5* rating for customer service, and peace of mind for me! 5* rating for ease of use, too. I am immunosuppressed, and this gives me an additional means of protecting myself when out and about. Thank you so much.

  17. 5 out of 5

    R K (verified owner)

    Haven't used it yet, but very impressed with customer service. I had several questions about how to use the purifier and they were answered promptly and clearly. It also looks lovely - I wouldn't be shy about using it in public places.

  18. 5 out of 5


    I have this in my office as I have a building site behind my house. The fumes and dust are a problem with the window open. The QT3 is just great at keeping me comfortable and hope fully healthy! Love it has a HEPA filter so will use for cleaning air to avoid COVID. It’s very stylish, easy to use and lightweight. Thank thank thank you!

  19. 5 out of 5

    Jane Webster (verified owner)

    Took it to my hospital outpatient appointment and felt much safer with so many around me not wearing masks. Also used it in my daughter’s car yesterday. Love it’s portability and it fits easily in my tote bag. Told my daughter to get one ready for her flight from USA to U.K. before Christmas!

  20. 5 out of 5

    Sara Brammall (verified owner)

    This is such a great little device. We've used it when out and about in cafes and meetings. Love it!

  21. 5 out of 5

    Ant (verified owner)

    I love the QT3. I had attended a workshop with SmartAir in Beijing years ago and found their DIY air filter invaluable. The QT3 arrived very fast and when I opened it I was pleased to find it was absolutely adorable. I was concerned it would be too big but although it is bigger than some other "personal" filters, I do feel it is perfectly formed. I have taken it on a day trip with me and it wasn't too obvious or too loud on the train table. It is nice and light too, so easy to cary in a big handbag. I feel so much better to have this air filter in my life. I just wish more people knew about these!

  22. 5 out of 5

    Vicky (verified owner)

    Excellent service and super fast delivery. I really like the shape and the retro feel of the QT3, it is very light and easy to carry too. It comes with clear instructions and is not complicated to set up, at all. I love the fact that is very quiet, as I bought it for my child to take to school. The battery life is really good, and I think it is a great idea that there is a small compartment to store the USB cable in. Powerful yet quiet, portable and simple to operate, safe and effective, it does exactly what it promises. My only suggestion would be, provided it is safe and will not compromise the efficiency of the system, to reduce its width as I think it is a tad bulky. Nevertheless, I feel reassured in my purchase, I am very happy with the product and I will be using Smart Air for all future purchases.

  23. 5 out of 5

    Carol (verified owner)

    This smart looking, light, and easy-to-carry air purifier arrived quickly and in sensible packaging. Love the retro styling! I plan to use it in the car when sharing journeys with family members who necessarily have more exposure to covid than I do…a very welcome layer of protection and peace of mind. I will only ever buy from Smart Air because I trust them to sell the best, independently tested purifiers at reasonable prices. Grateful to have this little purifier at the ready!

  24. 4 out of 5

    James (verified owner)

    Easy to set up and performed quietly in the office, even on the highest setting. Initially ran on a fully charged battery for several hours before needing to plug in. Light and portable. Gave me some extra assurance re: COVID. A colleague said the design reminded her of a vintage handbag! Perhaps Smart Air could look to make the buttons more user friendly for visually impaired people and label the filter replacement light and button so they are more intuitive. Overall a great little product and will hopefully prompt some more awareness of the air cleaning solutions!

  25. 5 out of 5

    Jay (verified owner)

    Very easy to use, not noisy. Small and light enough to be held on a lap facing you during medical appointments. Using it in a hospital waiting area gave me the confidence to be there. Good battery life but get a powerbank for longer than 2hrs use.

  26. 5 out of 5

    Gina (verified owner)

    Perfect size, smart looking and light. Good battery life. Can also run using USB C cable. Quiet too. Very quick delivery.

  27. 5 out of 5

    Gary Callard (verified owner)

    We received our QT3 today, much quicker than expected! Very lightweight, and surprisingly powerful for it’s size, perfect for taxi rides, hospital appointments, even just as a cooling fan when the weather calls for it! Comes with USB C cable and can be run from internal battery or a usb power bank. You can’t put a cost on peace of mind. Thanks!!

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Smart Air is a social enterprise that creates simple, no-nonsense air purifiers and provides free education to protect people's health from the effects of air pollution. We are proud to be the only certified B-Corp dedicated to fighting air pollution.

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