What to Look for in an Air Purifier for a Large Room

A big, tidy space should have clean air to match.

Clearing out air pollutants in large rooms is a big job, and you’ll need a purifier that’s built to tackle it, preferably one with multiple speed settings and a combination of filter types. HEPA filters collect the most common indoor contaminants, but look for one that has a “True HEPA” filter, which means it is certified to capture 99.97 percent of particles down to 0.3 microns in size. A big space can benefit from a purifier that comes with an ionizer to assist in taking out pollutants more quickly. It will also help the internal filter last longer. Another useful feature is Wi-Fi connectivity, which allows you to control the purifier with a smartphone or some other mobile device. It also lets you turn the purifier in your home on or off from any location, even if you’re on the other side of the world.

The washable pre-filter traps hair and lint and should be cleaned once a month. LEVOIT


HEPA filters are great for contaminants, but they aren’t enough to take on foul smells. To remove odors from pets, cooking, mold and smoke as well as volatile organic compounds from paints, varnishes, glues and various other items, you’ll need a carbon activated filter. Just don’t forget that it needs to be replaced once every three to six months, while HEPA filters can go for one year to 18 months.

It has a sanitizer that kills harmful bacteria and includes essential oil pads. Homedics


Ionizers produce negatively charged ions, which attract positively charged ions, including allergens and dust. No matter what kind of purifier you use, make sure it’s suited for the size of your room to generate enough airflow.

When it’s in auto mode, a smart sensor can detect changes in the level of pollution and adjust the fan speed accordingly. Hathaspace


Although air purifiers can work perfectly fine without it, getting one with Wi-Fi capability will give you valuable information about the effectiveness of the device. The apps include real-time reporting on the air quality via minute-by-minute updates. You’ll always know how clean the air inside your home is, no matter where you are.

Also Consider

On turbo speed, it can clean a 700-square-foot area once every 30 minutes. Alen


Good for spaces of up to 1,200 square feet, it has a PM 2.5 sensor that monitors, reports and responds to changes in atmosphere quality by adjusting fan speed. Bissell