Winix 5510
AHAM verified
- Really cleans
- 385 sq ft35 m² 35 m²385 sq ft
- Box says
- 392 sq ft36 m² about right
- New filter
- 12 months
Blueair · Blue Pure 311i Max (3332111100)
Blueair Blue Pure 311i Max
Really cleansAHAM verified
431 sq ft40 m² 40 m²431 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- Quickly cleans 439 ft² every 12.5 minutes & 2,207 ft² in 1 hourQuickly cleans 439 ft² every 12.5 minutes & 2,207 ft² in 1 hour (205 m²) 5.1× overstated
- New filter
- Every 9 months
Blueair's middle size, AHAM-verified, with an air quality sensor and an app. Cleans a living room with a dining area, with no air to spare.
Verdict
Who it's for
Light for the air it moves, with an air quality sensor and app control, and AHAM has verified its CADR. At the top of its range it has no spare air, so it's happiest in a room a size below its limit.
Good
- CADR verified by AHAM
- Light for its output
- Air quality sensor and app control
Trade-offs
- No spare air at the top of its range
- Filter is a Blueair-only part
Spec facts
Blueair Blue Pure 311i Max · Blue Pure 311i Max (3332111100)
- Really cleans
- 431 sq ft · 40 m²40 m² · 431 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Box claim
- Quickly cleans 439 ft² every 12.5 minutes & 2,207 ft² in 1 hourQuickly cleans 439 ft² every 12.5 minutes & 2,207 ft² in 1 hour (205 m²)5.1× overstated
- Maker’s claim: Blueair · checked 1 Nov 2026
- Filter
- Blue Pure 311i Max replacement filterParticle + activated carbon, washable fabric pre-filter. Replace every 9 months
- Maker’s claim: Blueair · 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
- Blue Pure 311i Max replacement filter
- Type
- Particle + activated carbon, washable fabric pre-filter
- Replace every
- 9 months
- Power at top speed
- 32 W
A new filter every 9 months means 1.3 filters a year. At top speed it draws 32 W: 0.8 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, Blueair, checked 1 Nov 2026
The box vs the maths
The box says 2,207 sq ft205 m². It really cleans 431 sq ft40 m².
To clean 2,207 sq ft205 m² it would only change the air in the room 0.9 times an hour. We size every purifier at 4.8 air changes an hour, the level AHAM's room-size guideline works out to.
The box gives two figures. The smaller one, the area it cleans every 12.5 minutes, is 4.8 air changes an hour and close to our figure. The one we show as the box claim is the bigger: the room it can change the air of once an hour.
481 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 40.1 m² = 431.3 sq ft40.1 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “Quickly cleans 439 ft² every 12.5 minutes & 2,207 ft² in 1 hour”, the purifier really cleans 431 sq ft, 5.1 times less.Drawn to scale: the box says “Quickly cleans 439 ft² every 12.5 minutes & 2,207 ft² in 1 hour”, the purifier really cleans 40 m², 5.1 times less.
Room sizes
Which rooms it fits
It suits 215 sq ft20 m², 269 sq ft25 m² and 322 sq ft30 m² rooms best: there it has 33–100% more air than the room needs, so it needn't run flat out. At 430 sq ft40 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 161 sq ft15 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 399 sq ft, under 3 m 359 sq ftUnder a 2.7 m ceiling it covers 37 m², under 3 m 33 m², so with a 3 m ceiling it no longer covers 376 sq ft35 m² or 430 sq ft40 m² (why).
For a 538 sq ft room or bigger it's too small, although the box claims 2,207 sq ft: the For a 50 m² room or bigger it's too small, although the box claims 205 m²: the 538 sq ft50 m² page lists models that cover it. In an open-plan space, add up every area without a door between (how).
Alternatives
The Blueair Blue Pure 311i Max or one of these?
The certified models closest in size, and what is different about each, from the same kinds of source.
Cleans 385 sq ft, 46 sq ft lessCleans 35 m², 5 m² less. It has an ionizer you can switch off. It goes longer between filters (every 12 months) and draws 65 W at top speed. 8 cm taller and 2.5 kg heavier.
Winix T810
AHAM verified
- Really cleans
- 411 sq ft38 m² 38 m²411 sq ft
- Box says
- 2,006 sq ft186 m² 4.9× overstated
- New filter
- 12 months
Cleans 411 sq ft, 20 sq ft lessCleans 38 m², 2 m² less. It has an ionizer you can switch off. It goes longer between filters (every 12 months). 3.5 cm taller and 1.1 kg heavier.
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
Cleans 457 sq ft, 26 sq ft moreCleans 42 m², 2 m² more. It has no air quality sensor. It has a different filter schedule (every 3–12 months).
Sources
Where these numbers come from
- Certified AHAM Verifide directory: Blueair Blue Pure 311i Max (3332111100) · AHAM Verifide
- Maker’s claim Blueair Blue Pure 311i Max product page and specifications · Blueair
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.