Air purifiers for rentals: sizing without guesswork
Match the purifier to the room, not to the marketing.
Sizing
Compare the rated room size with your room, and look for a clean air delivery rate from the maker.
Running costs
Filters need replacing. Check the price and lifespan of replacements before you buy, and the noise level on the lowest setting.
Our picks
We have not tested these products ourselves. The picks below come from published reviews and roundups, and some are written by sellers, so we treat them with care. Models and prices change, and many are sold mainly in North America: check the current version, price and compatibility where you live before you buy.
Levoit Core 300: small rooms
Rated for about 222 sq ft (about 20 m²), with a quiet sleep mode and a verified CADR rating. Filters last about six to eight months.
Coway Airmega 100: simple and cheap to run
A lower CADR, but filters that last about a year, which keeps running costs down.
Coway Airmega Mighty: medium rooms
Rated for about 361 sq ft (about 34 m²), with an automatic mode. Filters last about a year.
Blueair Pure 211i Max: large rooms
Rated for about 635 sq ft (about 59 m²), with a washable pre-filter.
A good rule from the review: choose a CADR of about two-thirds of the room’s floor area in square feet, and prefer certified CADR figures. Check noise on the lowest setting and the price of replacement filters.