The Best Air Purifiers of 2025

SadaNews - Whether you suffer from allergies, deal with poor air quality, are regularly exposed to wildfire smoke, or simply want to remove bacteria from your home's air, a good air purifier can help you.

Devices for Various Purposes

However, not all air purifiers work the same way; some are designed to target dust, while others are better at removing pet dander or mold spores.

With so many different options available, choosing the right device can be difficult. That's why 'CNET' experts tested dozens of air purifiers to help you find the most suitable one.

Top Choices

Here are 3 of our top picks.

* "BlueAir 311i Max" - Best Overall Air Purifier and best for smoke, allergies, and dust.

When it comes to smoke, seasonal allergens, and dust, one important consideration when purchasing an air purifier is whether it comes with an automatic mode, as some air particles do not remain constant throughout the year or even throughout the day.

Air purifiers like the "Blue Pure 311i Max" from 'BlueAir', equipped with an automatic air quality mode, respond to actual air quality and adjust the speed accordingly.

In addition to being our overall best pick, the "Blue Pure 311i Max" was the best at both low and high fan settings, reducing particle levels to pre-smoke levels in 6.6 minutes and 2 minutes, respectively.

Moreover, the "Blue Pure 311i Max" was the second most energy-efficient device for its capacity and operates remarkably quietly, reaching just 46.1 decibels at its highest fan setting; this is 9 decibels lower than the loudest model among those we tested.

Effective Model in a Small Size

* "Germ Guardian AC4300" - Best Air Purifier for Viruses, Bacteria, and Mold.

While the High-Efficiency Particulate Air (HEPA) filter is the industry standard for air purification systems, there is an additional measure, which is the UV-C light, specifically designed to deal with pathogens like viruses, bacteria, and mold, preventing them from multiplying.

The "Germ Guardian AC4300" performed average in air purification among the air purifiers we tested, purifying 612 square feet in about an hour, with a Clean Air Delivery Rate (CADR) ranging between 99 and 116, depending on the fine particles.

This device is primarily suited for small spaces, with a slightly higher energy consumption than those of similar size, but with a lower operating noise level. For those primarily concerned with pathogens like viruses and bacteria, this model is effective with a relatively small size and reasonable price.

Largest and Most Powerful Device

* "Coway Airmega 400s" - Best Air Purifier for the Entire Home.

The "Coway Airmega 400s" is among the largest and most powerful air purifiers on the market, with a high price tag, but it's an excellent option to consider for larger open spaces.

Its four advanced filtration layers can handle fine particles as small as 0.1 microns, having the highest CADR (Clean Air Delivery Rate) among all available models, ranging from 325 to 400 depending on the particles, and can purify an area of up to 3100 square feet in about an hour.

Its functions and features are on par with the "Blue Pure 311i Max" mentioned above, including the automatic mode that helps eliminate particles, such as smoke and seasonal allergens without having to run it at a high level continuously.

Its size, power consumption, and price are more serious factors, but it still represents good value considering its extensive capabilities, as for the money you pay, you also receive all the additional features: Wi-Fi connectivity allowing voice control or app control; smart settings, sleep settings, and eco-friendly settings; and real-time air quality monitoring.