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What room will it really clean?
Type in the number from the box or listing. The calculator turns it into a real room size at 4.8 air changes per hour.
Real room size calculator
Based on 4.8 air changes per hour, the rate behind the AHAM two-thirds rule. Box claims assume 8 ft ceilings.
Match your room
| Your room | Typical size | Fits |
|---|---|---|
| Small bedroom, office, nursery | 100 to 200 sq ft | Levoit Core 300 or GermGuardian tower |
| Primary bedroom, living room | 200 to 360 sq ft | Coway AP-1512HH |
| Large or open living area | 360 to 400 sq ft | Levoit Vital 200S-P |
| Bigger than 400 sq ft | Use two units at opposite ends |
High ceilings matter. A room with 10 ft ceilings holds 25% more air than the same floor area at 8 ft, so the calculator scales for it.