"A cheap purifier with features that belie its unrealistic coverage claims."
The 'up to 2200 sq. ft.' claim is based on a single, slow air change per hour. For effective allergen and particle removal, which requires 4-5 air changes per hour, this unit is realistically sized for a small bedroom or office, not a large room.
This product is for a buyer on a strict budget who needs a purifier for a very small space like a dorm room or a desktop area. They value features like an air quality display and auto mode more than verified performance metrics.
Anyone needing to purify a medium to large room should skip this. Buyers who prioritize validated performance from CADR ratings and want predictable long-term filter costs should invest in a product from an established brand.