If you haven’t heard of Smart Air, you’d be dumbfounded to know that the founder of this air purifier was inspired by a DIY air filter that he made using only a fan and a HEPA filter, which was able to reduce indoor levels of dangerous pollutants such as PM 0.5 and PM 2.5 by 84 percent and 92 percent respectively. 

The Sqair is a stylish upgrade to the DIY device, which gives the same results and is noticeably quieter than major purifiers on the market.

Price: HK$730

Available at smartairfilters.com

Ideal for those with a big home, the Alen BreatheSmart air purifier can clean up to 1,100 sq. ft., leaving you fresh, pure air in just under two hours. The device can detect air pollutant levels in the room to adjust its cleaning power to achieve the best air quality while maximising filter life and saving energy. 

The device comes with not one, but four HEPA filters that can be used interchangeably based on your needs, whether you want to get rid of dust and allergens, mold and germs, smoke and VOCs or pet and diaper odours. Whichever you choose, the HEPA filtration is claimed to remove 99 percent of airborne particles as small as 0.3 microns.

Price: HK$8,380 

Available at Amazon

Philips is a household name for quality air purifiers for good reason. If you find it difficult to tell how clean the air is, this air purifier is installed with a smart sensor that detects even the slightest change in air and provides real-time feedback of your indoor air quality with a PM2.5 numerical display. It also has a colour ring feature that gives an additional visual cue, ranging from blue (good) to red (poor) to indicate the air quality. 

Another appeal of this product is the ability to control the fan speed and check the filter remotely using an app, which is a convenient function for anyone who is into smart home technology.

Price: HK$4,988

Available at fortress.com.hk

Compact enough to fit on your shelf but powerful enough to remove 99.97 percent of particulate matter down to 0.3 microns, from dust, pollen to PM 2.5 and PM 0.3-0.5, this air purifier from Xiaomi is an excellent entry-level choice. 

The True HEPA filter has a cylindrical shape that takes in air from every direction and is layered with an activated coconut carbon filter that captures odour. Also, you can sleep soundly knowing the air purifier is working to clean the air without filling your room with noise.  

Price: HK$1,099

Available at Mi

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Equipped with their LIFAsmart Monitor-Controller which measures pollutant levels while also acting as the command centre of the air purifier, this machine delivers 400 m³ of clean air per hour, purifying everything from dust, viruses, VOCs, PM2.5, dander, smoke, bacteria, carbon dioxide, PM3.5 and clothing fibres. 

The easy-to-use built-in monitor and sensors also detect particles and TVOC, controlling the air volume on its own according to your room's air quality. 

Price: HK$4,680

Available at Fortress

This luxe air purifier from Aeris is compact enough to fit in any room, yet strong enough to eliminate over 99.5% of indoor air pollutants. With wireless control and built-in software, you can change the settings without even needing to leave your seat. 

The Aair Air Lite Purifier is engineered with an H12 main HEPA filter and IAQ sensor technology, delivering up to 315 m³/h of clean air to your living space. 

Price: HK$4,800

Available at Lane Crawford

The Tech Bar's Momax Ultra-Air IoT UV Purifying Fan is a silent yet powerful fan and air purifier that delivers nine levels of cool air while also filtering and sterilising it with the machine's H13 HEPA filter and UV-C germ-killing light. 

Control the fan remotely using their smart app or pair it with your Apple Home or smart home devices and control it with your voice. 

Price: HK$4,350

Available at Selfridges & Co

Eliminating fungi and viruses in just 30 minutes, Balmuda's A01C Air Cleaner filters out 99.97% air particles in its JET clean mode while the carbon filter deodorises any smoke and lingering scents in the room.

Using a three-layer filter system which includes the TrueHEPA Filter, this machine can be used in bigger rooms of up to 60m2 area space. 

Price: HK$5,680

Available at Fortress

Wearing Apple store's stamp of approval, the Wynd Plus Smart Personal Air Purifier is sold online on Apple, which means it's been tried, tested and approved by the big tech company. 

Weighing less than a pound, this portable air purifier is perfect for your work desk, cleaning the air from particulates, smoke, dander and germs throughout the day. If you're keen on learning more about your environment, the air purifier's app acts as an information resource as well as remote for you to control the purifier and tracker. 

Price: HK$1,798 

Available at Apple

This article was originally published on January 22, 2020 and was updated on January 18, 2021.