Rating based on real customers reviews
QT3 Portable Air Purifier
The QT3 Portable Air Purifier makes clean air accessible no matter where you go.
Clean Air Anywhere Life Takes You
From restful nights and focused study sessions to travel, work, and everyday moments—QT3 delivers portable, whisper-quiet air purification designed to fit seamlessly into every space you live, move, and breathe in.
How QT3 Is Built
The QT3 is compact enough to fit on a small table but powerful enough to provide a stream of clean air up to 1.2 meters away.
QT3 E11 Filter
HEPA filters are the key to clean air, so make sure to replace them regularly.
QT3 Body
Designed without harmful ionizers or UV light for safer, cleaner everyday use.
Fan Protective Mesh
Designed to maximize clean air delivery and filter performance.
USB-C Charging
- Home Version: USB-C powered for continuous daily use
- Travel Version: Built-in battery with USB-C charging for clean air on the go
Speed Dial
Easily adjust airflow and purification intensity to match your comfort and cooling needs.
Indicator
Built-in filter replacement indicator lights up when it’s time for a new filter.
Why QT3?
The QT3 is designed to give you personal clean air anywhere—at your desk, bedside, during travel, or in shared spaces. Unlike typical fans or “air gadgets,” it uses a true HEPA filter to capture harmful particles like dust, allergens, pollen, smoke, and viruses, instead of just moving air around.
Lightweight and Portable
Weighs only 720g and fits easily inside a backpack or carry bag.
Up to 800 Hours Per Filter
Larger filter design delivers better airflow and up to 800 hours of use before replacement.
Long Battery Life
Enjoy up to 4 hours of clean air on a single charge.
Personal Clean Air Companion
Portable clean air wherever you go — at work, school, on public transport, or while traveling.
Equipped with an E11 air filter capturing over 95% of viruses, bacteria, PM2.5, and other harmful pollutants in one pass.
Say Bye to Pollutants
PM2.5 (Fine Particles)
Captures fine airborne particles like dust, smoke, and pollution that can affect daily breathing comfort.
Dust
Everyday household particles made of skin cells, fibers, and debris. The purifier helps reduce airborne dust before it settles on surfaces.
Allergens
Triggers like pet dander, dust mite particles, and other irritants that can cause sneezing, watery eyes, or breathing discomfort.
Pollen
Outdoor particles that easily enter your home through windows and clothing. The purifier helps reduce pollen exposure indoors, especially during allergy season.
Mold Spores
Microscopic spores released by mold in damp environments. Removing them from the air helps reduce musty odors and supports a healthier breathing environment.
A Company You Can Trust
We believe clean air should be safe, simple, and honest. That’s why we focus on proven filtration — not gimmicks. No harmful ionizers, no UV light, and no unreliable built-in air quality monitors. Just effective, tested purification designed for everyday peace of mind.
EMC Certified
Ensures safe electromagnetic performance without interfering with other devices.
RoHS Certified
Confirms restricted use of hazardous substances for safer everyday use.
CE Certified
Meets essential European safety, health, and environmental protection standards.
C-mark Certified
Verified for compliance with required product safety and quality standards.
GB 4706.1-2005 Certified
Meets national safety standards for household and electrical appliances
GB 4706.27-2008 Certified
Certified for safety requirements specific to air-cleaning appliances.
Here is What People Think
Leave a Review
6 reviews for QT3 Portable Air Purifier
Rating based on real customers reviews
QT3 Portable Air Purifier
The QT3 Portable Air Purifier makes clean air accessible no matter where you go.
- CADR of 37 m³/h.
- Delivers fresh air up to 1.2m
- Whisper-quiet at just 29dBA
- Air Filter Lifespan: 200 days / 800 hours (based on 8 hrs/day)
Buy Together
QT3 E11 Filter (2 pack)
Add an extra filter now for uninterrupted clean air anytime.
Order includes: 1x The QT3 Air Purifier, 1x Air filter, 1x USB Charge Cable, 1x Instruction Manual
QT3 Technical Specifications
Product Name
The QT3 Air Purifier
Clean Air Delivery Rate (CADR)
37 m³/hour
Filter Grade
E11, 95%
Noise Levels
29 – 45 dBA
Power Consumption
9W
Recommended Maximum Usable Distance
Up to 1.2m
Power Supply
5V DC (USB Port)
Box Dimensions (L x W x H)
16.8 x 15.6 x 22.8 cm
Net Weight
0.72kg
Certifications
EMC Certified, RoHS Certified, CE Certified, C-mark Certified, GB 4706.1-2005; GB 4706.27-2008 Certified
Frequently Asked Questions
How can I test if my QT3 is working correctly?
Hold a single-ply tissue (like toilet paper) near both sides of the unit. One side should pull air in, and the other side should blow air out. This shows the purifier is working properly.
Why does more air seem to come out of the back than the front?
This is normal. Some air may flow out from the inlet side because the HEPA filter creates resistance. The air is then pulled back in and filtered again, similar to how a sealed HEPA vacuum works.
Can the QT3 stay plugged in all the time?
There are two versions: Home and Travel. For the Travel version, we do not recommend leaving it plugged in 24/7, as this can reduce long-term battery performance. The Home version is designed for continuous plugged-in use.
Can the QT3 Travel still work if the battery no longer holds a charge?
Yes. Even if the battery becomes weaker over time, the QT3 Travel can still be used while plugged in with the USB-C cable.
Can I use any USB charger with the QT3? Why doesn’t it come with a plug?
The QT3 includes a 5V USB-C charging cable but no wall plug, helping keep costs lower for customers worldwide. Please only use a 5V charger. Higher-powered laptop chargers may cause overheating and should not be used.
Can the QT3 Travel version be used on an airplane?
Yes. Since it contains a lithium battery, it must be packed in your carry-on luggage, not checked baggage. Please check your airline’s battery policy before flying.
How do I set or reset the filter reminder?
Press and hold the Filter Reminder button for a few seconds until the light flashes. This resets the timer. After 800 hours of use, the light turns on as a reminder to check your filter, not necessarily replace it.
Is the battery in the QT3 Travel version replaceable?
No. The battery is built into the unit and cannot be replaced separately.
Frequently Bought Together
Rating based on real customers reviews
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Samantha –
Have been using the QT3 for train and plane travel, and while I work in the library. It’s VERY quiet– the Library of Congress doesn’t allow most air purifiers because of noise, but this one is allowed. It’s also lightweight and fits easily in a bag, and maintains a charge for several hours. Definitely makes me feel safer now that most people refuse to wear a mask and no one seems keen on improving indoor ventilation. The one drawback is that I seem to have lost one of the little rubber feet and there doesn’t seem to be an option to buy a replacement (sad). It doesn’t affect how it runs, though, so I’m still giving it 5 stars.
DBena –
I love this thing. Used it a ton on a transatlantic trip, in addition to an N95, for two months. I was initially unsure if it wasn’t excessive to carry a mini air filter with me, but I used this thing so much on the trip, and stayed healthy the whole trip. I will absolutely bring it with me again on future travels or other high risk situations. (It’s important to note that I used this in combination with a well-fitting N95, simply as an added layer of protection. I’m not suggesting I think it would necessarily be enough on its own)
I was so glad to have it, especially when we got stuck on the runway for an hour, when filters are usually off and there’s no ventilation. It’s great to have something with you that might make a difference rather than just being stuck there, helpless. Used it again on bus/train rides, especially with audibly sick people coughing all around me. In theses cases, I held it close to my face – which also makes it function like a fan, cooling you off (I get hot in N95s). Airline stewardesses were curios about it but they didn’t make me put it away, even during take off and landing. I carried a cell-phone battery pack for running it for a long time (eg 10 hour flight), but the battery in it lasts pretty well too – useful for those moments the airline stewardess doesn’t want anything plugged into the USB ports. It’s very light weight and no problem to hold it for long periods of time.
Dear SmartAir: this thing rules, but those two little plastic pieces that can fall out of position when it’s turned on its side should get redesigned so they can’t fall. In fact, this was used in every position and orientation possible, so designing for that possibility would be good. Also, the strap came off immediately, and the peg to hold it was instantly lost. Overall, though – a lightweight little filter, quiet, USB2 cable – very useable device.
Vic –
Highly recommended. I’m still trying to survive the COVID-19 pandemic and this little air purifier has helped me feel more reassured about my safety. I let it blow towards me while I wear my N95 mask on public transport and in crowded areas. Relatively quiet and I can’t hear it when there’s background noise. Love the cute design, it’s lightweight, and has a convenient handle. Only downside is that it has small gaps next to the filter that might leak unfiltered air, but it’s easily covered with tape (DIY). I heard some customers have received extra accessories for covering the gaps, which I didn’t receive but I haven’t asked about it (for context, I purchased from Australian distributor). Thank you for this awesome device.
Jay –
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.
Gina –
Perfect size, smart looking and light. Good battery life. Can also run using USB C cable. Quiet too. Very quick delivery.
Gary Callard –
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!!