
GermGuardian AC4825E
AHAM verified
- Really cleans
- 150 sq ft14 m² 14 m²150 sq ft
- Box says
- 743 sq ft69 m² 4.9× overstated
- New filter
- 6–8 months
Levoit · Core 200S (LAP-C201S)
137 sq ft12 m² 12 m²137 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
A small smart cylinder with a verified CADR. Enough for a single bedroom or home office, with app control and a night light.

The smallest Levoit that really cleans a room, and a sensible choice for a single bedroom or study. It has app and voice control but no air quality sensor, so you set the speed yourself. Anything bigger than a small bedroom needs a larger model.
Levoit Core 200S-P · Core 200S (LAP-C201S)
Certified: measured in an independent lab for AHAM’s Verifide programme. Maker’s claim: the manufacturer’s own figure, not independently checked. Where figures come from
A new filter every 6–8 months means 1.5–2 filters a year. At top speed it draws 37 W: 0.9 kWh if it ran flat out all day. Slower settings use less.
Source: Maker’s claim, Levoit, checked 1 Nov 2026
To clean 672 sq ft62 m² it would only change the air in the room 1 time an hour. We size every purifier at 4.8 air changes an hour, the level AHAM's room-size guideline works out to.
Levoit's figure is the room it can change the air of once an hour, and the wording says as much. That's a real number, but at one air change an hour smoke and pollen come back in nearly as fast as the purifier removes them.
153 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 12.7 m² = 137.2 sq ft12.7 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “Changes the air in a 672 ft2 room once per hour”, the purifier really cleans 137 sq ft, 4.9 times less.Drawn to scale: the box says “Changes the air in a 672 ft2 room once per hour”, the purifier really cleans 12 m², 4.9 times less.
It covers 107 sq ft10 m² rooms, but it only just keeps up (20% to spare), so it would run near its top speed, usually its loudest (why we don’t list noise).
Under a 2.7 m ceiling it covers 127 sq ft, under 3 m 114 sq ftUnder a 2.7 m ceiling it covers 11 m², under 3 m 10 m²: still enough for every size it covers above (why).
For a 161 sq ft room or bigger it's too small, although the box claims 672 sq ft: the For a 15 m² room or bigger it's too small, although the box claims 62 m²: the 161 sq ft15 m² page lists models that cover it.
The certified models closest in size, and what is different about each, from the same kinds of source.

AHAM verified
Cleans 150 sq ft, 13 sq ft moreCleans 14 m², 2 m² more. Same sensor, ionizer and filter interval. 23.9 cm taller and 0.9 kg heavier.

AHAM verified
Cleans 217 sq ft, 80 sq ft moreCleans 20 m², 8 m² more. It draws 56 W at top speed. 4 cm taller and 0.6 kg heavier.

AHAM verified
Cleans 217 sq ft, 80 sq ft moreCleans 20 m², 8 m² more. It has a PM2.5 sensor with auto mode. It goes longer between filters (every 6–12 months). 8.6 cm taller and 0.9 kg heavier.
We don't test purifiers ourselves: every figure on this page is copied from these sources and was last checked on 1 Nov 2026. Spotted one that's wrong or out of date? Tell us and we'll fix it and change the date.