Levoit EverestAir-P
AHAM verified
- Really cleans
- 539 sq ft50 m² 50 m²539 sq ft
- Box says
- 2,635 sq ft245 m² 4.9× overstated
- New filter
- 12–15 months
Medify Air · MA-112
Medify MA-112
Really cleansAHAM verified
905 sq ft84 m² 84 m²905 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- 60 mins: 4,455 square feet (1 ACH)60 mins: 4,455 square feet (1 ACH) (414 m²) 4.9× overstated
- New filter
- Every 4 months
See it on Amazon: Medify MA-112Paid link
A big, heavy unit with the highest verified CADR on our list. Cleans a whole small flat or a classroom on its own.
Verdict
Who it's for
The one purifier on our list that cleans a whole small flat or a classroom by itself, with an AHAM-verified CADR. It's large and heavy, and Medify says to change both filter sets about every four months, more often than anything else here.
Good
- Highest verified CADR on our list
- Cleans spaces no other single model covers
- No ionizer
Trade-offs
- Two filter sets, changed about every four months
- Large and heavy
- No air quality sensor or auto mode
Spec facts
Medify MA-112 · MA-112
- Really cleans
- 905 sq ft · 84 m²84 m² · 905 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Box claim
- 60 mins: 4,455 square feet (1 ACH)60 mins: 4,455 square feet (1 ACH) (414 m²)4.9× overstated
- Maker’s claim: Medify Air · checked 1 Nov 2026
- Filter
- Medify MA-112 Filter Set (two sets per unit)H13 True HEPA + activated carbon, washable pre-filter. Replace every 4 months
- Maker’s claim: Medify Air · 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
- Medify MA-112 Filter Set (two sets per unit)
- Type
- H13 True HEPA + activated carbon, washable pre-filter
- Replace every
- 4 months
- Power at top speed
- 95 W
A new filter every 4 months means 3 filters a year. At top speed it draws 95 W: 2.3 kWh if it ran flat out all day. Slower settings use less.
We have no Amazon link for this filter: the maker's page in the sources sells or lists it.
Source: Maker’s claim, Medify Air, checked 1 Nov 2026
The box vs the maths
The box says 4,455 sq ft414 m². It really cleans 905 sq ft84 m².
To clean 4,455 sq ft414 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.
Medify Air'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.
1,009 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 84.1 m² = 905.3 sq ft84.1 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “60 mins: 4,455 square feet (1 ACH)”, the purifier really cleans 905 sq ft, 4.9 times less.Drawn to scale: the box says “60 mins: 4,455 square feet (1 ACH)”, the purifier really cleans 84 m², 4.9 times less.
Room sizes
Which rooms it fits
It suits 538 sq ft50 m² and 645 sq ft60 m² rooms best: there it has 40–68% more air than the room needs, so it needn't run flat out. At 861 sq ft80 m² it only just keeps up (5% to spare), so it would run near its top speed, usually its loudest (why we don’t list noise). In rooms of 430 sq ft40 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 838 sq ft, under 3 m 754 sq ftUnder a 2.7 m ceiling it covers 77 m², under 3 m 70 m², so with a 3 m ceiling it no longer covers 861 sq ft80 m² (why).
For a 1,076 sq ft room or bigger it's too small, although the box claims 4,455 sq ft: the For a 100 m² room or bigger it's too small, although the box claims 414 m²: the 1,076 sq ft100 m² page lists models that cover it. In an open-plan space, add up every area without a door between (how).
Alternatives
The Medify MA-112 or one of these?
The certified models closest in size, and what is different about each, from the same kinds of source.
Cleans 539 sq ft, 366 sq ft lessCleans 50 m², 34 m² less. It has a PM2.5 sensor with auto mode. It goes longer between filters (every 12–15 months) and draws 70 W at top speed. 13 cm shorter and 5.5 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, 310 sq ft lessCleans 55 m², 29 m² less. It has a PM2.5 sensor with auto mode. It goes longer between filters (every 6–12 months) and draws 49 W at top speed. 11.9 cm shorter and 8.7 kg lighter.
Blueair Blue Pure 211i Max
AHAM verified
- Really cleans
- 662 sq ft61 m² 61 m²662 sq ft
- Box says
- 3,235 sq ft301 m² 4.9× overstated
- New filter
- 9 months
Cleans 662 sq ft, 243 sq ft lessCleans 61 m², 23 m² less. It has a PM2.5 sensor with auto mode. It goes longer between filters (every 9 months) and draws 46 W at top speed. 14.2 cm shorter and 7.5 kg lighter.
Sources
Where these numbers come from
- Certified AHAM Verifide directory: Medify MA-112 · AHAM Verifide
- Maker’s claim Medify MA-112 filter set page, with the MA-112 specifications · Medify Air
- Maker’s manual Medify MA-112 2.0 user manual (PDF) · Medify Air
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.