Air purifiers compared on clean air delivered, not square-foot claims.
Smoke CADR, sleep-mode decibels, watts, carbon stages and filter life. AirPick reads each maker's spec table and ranks large-room, bedroom, smoke-and-odor and combo purifiers with the weights printed on every page. 4 categories, 66 products, 42 head-to-heads.
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Room purifiers by job, plus combos that also heat, cool or humidify.
Popular head-to-heads
Buying guides
How it works
1. The maker's spec table
Every figure comes from the manufacturer's own product or spec page, linked on the product card. Shark, Honeywell, Dyson and IQAir don't publish an AHAM CADR, so those cells stay blank.
2. Different jobs, different weights
Large-room purifiers are scored mostly on CADR; bedroom purifiers on sleep-mode noise; smoke purifiers on carbon life and smoke filters; combos on their extra modes.
3. Match it to your room
A nursery, an open-plan living room and a smoker's apartment need different machines. Use the guides, then check the price on Amazon. Commissions never change the order.