Needs 120 m³/h (71 CFM) of smoke CADR. Why? 10 m²107 sq ft · A single bedroom, nursery or home office
GermGuardian · AC4825E
Covers 150 sq ft14 m² (14 m²150 sq ft) · 40% spare
Why it's here: The smallest verified model with 25% more air than this room needs, so it needn't run flat out.
Specs, sources and trade-offs
Levoit · Core 200S (LAP-C201S)
Covers 137 sq ft12 m² (12 m²137 sq ft) · 20% spare
Why it's here: The smallest verified model that still covers this room. It will run near its top speed.
Specs, sources and trade-offs
Levoit · LAP-V102S
Covers 217 sq ft20 m² (20 m²217 sq ft) · 100% spare
Why it's here: The most spare air without going oversized: cleans faster and copes with an open door.
Specs, sources and trade-offs
AHAM verified
12 bigger verified models cover it too, but each is more than twice the size this room needs, so we leave them out here. See every purifier.
The CADR for these comes from the maker only, so we never make them a pick. We show the maths so you can compare.
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These are sold as big enough for 107 sq ft10 m², but at 4.8 air changes an hour they aren't.
A single bedroom, nursery or home office: about 10 × 11 ft (3 × 3.5 m)about 3 × 3.5 m (10 × 11 ft). With a 2.5 m ceiling that's 25 m³ of air to pass through a filter 4.8 times an hour.
Spare air: 40% for the GermGuardian AC4825E, 20% for the Levoit Core 200S-P and 100% for the Levoit Vital 100S-P. The more air to spare, the slower and quieter it can run here to keep up (more on noise).
Only the Levoit Vital 100S-P has a PM2.5 sensor with auto mode. None has an ionizer.
New filters: every 6–12 months for the Levoit Vital 100S-P, every 6–8 months for the GermGuardian AC4825E and every 6–8 months for the Levoit Core 200S-P (filters). The Levoit Core 200S-P is the most compact at 32 cm tall and 3 kg; the GermGuardian AC4825E stands 55.9 cm and weighs 3.9 kg.
With a 2.7 m ceiling this room needs 130 m³/h of smoke CADR, with 3 m 144 m³/h. Every pick here still covers it at 3 m. (Why ceilings matter)
If this room opens onto a kitchen or hall with no door between, count it too. Add 54 sq ft and you're at If this room opens onto a kitchen or hall with no door between, count it too. Add 5 m² and you're at 161 sq ft15 m²: of the picks here, only the Levoit Vital 100S-P still covers it. (Open-plan spaces)
A single bedroom, nursery or home office: one purifier is enough, as long as the door to the next room is shut or you count that room too (when it isn’t).
In a bedroom or nursery, put it near the bed, with the air inlet clear of bedding and furniture, and keep the door shut at night. (Where to put it)
Enter your room and ceiling height. Room pages round up to the next size.