That’s why we test all the models we recommend in the same room (sized 705 cubic ft) performing the same job (removing incense smoke). It uses 3-stage filtration with a washable pre-filter
and HEPA filter for airborne particles, along with an Activated Carbon layer to tackle VOCs. During our tests, this unit only used 6.4 watts of power, even running at its highest speed.
I have an issue with a space heater’s volume (it adds extra drama to my Zoom set up!) and I don’t have similar volume problems with the air filter. The other big promise is its design—a lot of air purifiers are ugly—and even though the size of this purifier is quite large, it’s round, space-y appearance
is a lot of fun (dare I say it’s a statement piece?). The design is super intuitive and there’s an app you can use too (though I don’t feel a need for it). I also appreciate the ability to turn the display lights off without turning the purifier itself off (I have this problem with a couple devices).
However, air purifiers can help reduce airborne contaminants, including viruses and bacteria, in small spaces, and the EPA states that “filtration can be part of a plan to reduce the potential for airborne transmission of COVID-19 indoors.” Where the 300S differs is with its range of advanced smart features that will enable the user to operate the unit in new ways and learn more about your environment’s air quality. Perhaps the best smart feature comes from Levoit’s AirSight™ Plus technology. This enables the purifier to monitor the surrounding air and provide real-time air quality updates through its color-coded display and more detailed feedback through the Levoit app.
The purifier itself works like a dream, and I noticed within a week of use that I felt noticeably less congested. The intuitive device uses a 360° filtration system that implements a combination of activated carbon to remove potentially harmful gases and odors from the air and a HEPA H13 filter to capture 99.97% of particles. I appreciated that the Hot+Cold has an auto mode, which continuously monitors room temperature and indoor air quality, while also running the fan or heat to the degree of your choosing.
Neither ZDNET nor the author are compensated for these independent reviews. Indeed, we follow strict guidelines that ensure our editorial content is never influenced by advertisers. Along with our in-house experts, our team analyzes thousands of product reviews from the most trusted websites. Unfortunately, for all its great functionality, the VeSync app wasn’t always reliable. During the course of our testing, we had to uninstall and reinstall the app twice when it crashed. Models that have the Energy Star rating will use less energy than comparable products.