About AirSheet

Air purifier boxes advertise huge room sizes — often at one air change per hour, which barely makes a dent. The number that actually tells you how fast a purifier cleans a room is its clean air delivery rate (CADR).

AirSheet compares purifiers on CADR, noise and true running cost (filters plus electricity), using each brand's published specs and official store prices, and sizes every model with the same standard so they can be compared fairly. Rankings are computed from the data, not from who pays the highest commission.

Spot a wrong spec? Brands revise models often — corrections are always welcome.

AirSheet is part of BuyerSheet, a small family of independent comparison sites that rank products on the numbers.