Honeywell HPA300
AHAM verified
- Really cleans
- 457 sq ft42 m² 42 m²457 sq ft
- Box says
- 465 sq ft43 m² about right
- New filter
- 3–12 months
Levoit · LAP-EL551S-AUS
Levoit EverestAir-P
Really cleansAHAM verified
539 sq ft50 m² 50 m²539 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- Changes the air in a 2635 ft2 room once per hourChanges the air in a 2635 ft2 room once per hour (245 m²) 4.9× overstated
- New filter
- Every 12–15 months
A wide smart purifier with a verified CADR, a three-channel laser sensor and a long-life filter. Cleans an open-plan room.
Verdict
Who it's for
Levoit's wide, flat large-room unit, AHAM-verified, for an open-plan kitchen and living room. It has a detailed laser sensor, auto mode and app control, and a filter that lasts longer than most on our list.
Good
- CADR verified by AHAM
- Longer filter life than most
- Laser sensor reads PM1, PM2.5 and PM10
- No ionizer
Trade-offs
- Wide: needs a clear spot along a wall
- Box headline is based on one air change an hour
Spec facts
Levoit EverestAir-P · LAP-EL551S-AUS
- Really cleans
- 539 sq ft · 50 m²50 m² · 539 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Box claim
- Changes the air in a 2635 ft2 room once per hourChanges the air in a 2635 ft2 room once per hour (245 m²)4.9× overstated
- Maker’s claim: Levoit · checked 1 Nov 2026
- Filter
- Levoit EverestAir-P Main / Activated Carbon FilterHEPA-grade main filter + activated carbon. Replace every 12–15 months
- Maker’s manual: Levoit · checked 1 Nov 2026
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
Running it
Filter and upkeep
- Replacement filter
- Levoit EverestAir-P Main / Activated Carbon Filter
- Type
- HEPA-grade main filter + activated carbon
- Replace every
- 12–15 months
- Power at top speed
- 70 W
A new filter every 12–15 months means 0.8–1 filters a year. At top speed it draws 70 W: 1.7 kWh if it ran flat out all day. Slower settings use less.
Source: Maker’s manual, Levoit, checked 1 Nov 2026
The box vs the maths
The box says 2,635 sq ft245 m². It really cleans 539 sq ft50 m².
To clean 2,635 sq ft245 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.
601 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 50.1 m² = 539.5 sq ft50.1 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 2635 ft2 room once per hour”, the purifier really cleans 539 sq ft, 4.9 times less.Drawn to scale: the box says “Changes the air in a 2635 ft2 room once per hour”, the purifier really cleans 50 m², 4.9 times less.
Room sizes
Which rooms it fits
It suits 269 sq ft25 m², 322 sq ft30 m², 376 sq ft35 m² and 430 sq ft40 m² rooms best: there it has 25–100% more air than the room needs, so it needn't run flat out. At 538 sq ft50 m² it only just keeps up (no air to spare), so it would run near its top speed, usually its loudest (why we don’t list noise). In rooms of 215 sq ft20 m² or less it's more than twice the size needed; a smaller model does the job.
Under a 2.7 m ceiling it covers 499 sq ft, under 3 m 449 sq ftUnder a 2.7 m ceiling it covers 46 m², under 3 m 41 m², so with a 3 m ceiling it no longer covers 538 sq ft50 m² (why).
For a 645 sq ft room or bigger it's too small, although the box claims 2,635 sq ft: the For a 60 m² room or bigger it's too small, although the box claims 245 m²: the 645 sq ft60 m² page lists models that cover it. In an open-plan space, add up every area without a door between (how).
Alternatives
The Levoit EverestAir-P or one of these?
The certified models closest in size, and what is different about each, from the same kinds of source.
Cleans 457 sq ft, 82 sq ft lessCleans 42 m², 8 m² less. It has no air quality sensor. It needs filters more often (every 3–12 months).
Winix 9800
AHAM verified
- Really cleans
- 513 sq ft47 m² 47 m²513 sq ft
- Box says
- 2,506 sq ft233 m² 4.9× overstated
- New filter
- 3–12 months
Cleans 513 sq ft, 26 sq ft lessCleans 47 m², 3 m² less. It has an ionizer you can switch off. It needs filters more often (every 3–12 months). 0.9 kg lighter.
Levoit Core 600S-P
AHAM verified
- Really cleans
- 595 sq ft55 m² 55 m²595 sq ft
- Box says
- 2,909 sq ft270 m² 4.9× overstated
- New filter
- 6–12 months
Cleans 595 sq ft, 56 sq ft moreCleans 55 m², 5 m² more. It needs filters more often (every 6–12 months) and draws 49 W at top speed. 3.2 kg lighter.
Sources
Where these numbers come from
- Certified AHAM Verifide directory: Levoit EverestAir-P (LAP-EL551S-AUS, -AUSR, -WUSB) · AHAM Verifide
- Maker’s claim Levoit EverestAir-P product page and specifications · Levoit
- Maker’s manual Levoit EverestAir-P user manual (PDF) · Levoit
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.