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Air purifiers for a 430 sq ft roomAir purifiers for a 40 m² room

Needs 480 m³/h (283 CFM) of smoke CADR. Why? 40 m²430 sq ft · A living room with a dining area

Picked by the BuyBySpecs Team

BuyBySpecs on YouTube · sources checked 1 Nov 2026

3 picks for 430 sq ft3 picks for 40 m²

Also big enough for 430 sq ft40 m²

Honeywell HPA300

Honeywell

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

Winix 9800

Winix

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

Levoit Core 600S-P

Levoit

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

One bigger verified model covers it too, but it is more than twice the size this room needs, so we leave it out here. See every purifier.

Big enough on paper, but not verified

The CADR for these comes from the maker only, so we never make them a pick. We show the maths so you can compare.

Coway Airmega 400S

Coway

Not verified

Really cleans
499 sq ft46 m² 46 m²499 sq ft
Box says
3,120 sq ft290 m² 6.2× overstated
New filter
6–12 months

Coway Airmega 350

Coway

Not verified

Really cleans
536 sq ft49 m² 49 m²536 sq ft
Box says
2,640 sq ft245 m² 4.9× overstated
New filter
12 months

The box says yes. The maths says no.

These are sold as big enough for 430 sq ft40 m², but at 4.8 air changes an hour they aren't.

  • GermGuardian AC4825E Cleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hourCleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hour (69 m²) really 150 sq ft14 m²
  • Coway Airmega AP-1512HH Mighty Purifies 1,748 ft² in 60 minsPurifies 1,748 ft² in 60 mins (162 m²) really 355 sq ft32 m²
  • Coway Airmega Mighty2 Purifies 1,800 ft² in 60 minsPurifies 1,800 ft² in 60 mins (167 m²) really 365 sq ft33 m²
  • Coway Airmega 100 Purifies 810 ft² in 60 minsPurifies 810 ft² in 60 mins (75 m²) really 164 sq ft15 m²
  • Levoit Core 200S-P Changes the air in a 672 ft2 room once per hourChanges the air in a 672 ft2 room once per hour (62 m²) really 137 sq ft12 m²
  • Levoit Core 300 Changes the air in a 1066 ft2 room once per hourChanges the air in a 1066 ft2 room once per hour (99 m²) really 217 sq ft20 m²
  • Levoit Vital 100S-P Ideal Room Size: 1066 ft2 (1 ACH) / 222 ft2 (4.8 ACH)Ideal Room Size: 1066 ft2 (1 ACH) / 222 ft2 (4.8 ACH) (99 m²) really 217 sq ft20 m²
  • Levoit Vital 200S-P Changes the air in a 1862 ft2 room once per hourChanges the air in a 1862 ft2 room once per hour (173 m²) really 381 sq ft35 m²
  • Blueair Blue Pure 511i Max Quickly cleans 237 ft² every 12.5 minutes & 1,138 ft² in 1 hourQuickly cleans 237 ft² every 12.5 minutes & 1,138 ft² in 1 hour (106 m²) really 233 sq ft21 m²
  • Winix T810 Also cleans rooms up to 2,006 sq ft in 1 hourAlso cleans rooms up to 2,006 sq ft in 1 hour (186 m²) really 411 sq ft38 m²
  • Levoit Core 400S-P Changes the air in a 1718 ft2 room once per hourChanges the air in a 1718 ft2 room once per hour (160 m²) really 356 sq ft33 m²
  • Coway Airmega 200M Purifies 1,748 ft² in 60 minsPurifies 1,748 ft² in 60 mins (162 m²) really 374 sq ft34 m²
  • Coway Airmega 150 Purifies 1,035 ft² in 60 minsPurifies 1,035 ft² in 60 mins (96 m²) really 233 sq ft21 m²
  • Rabbit Air A3 Normal Residential Use (2 Air Changes Per Hour): 1,070 sq. ft.Normal Residential Use (2 Air Changes Per Hour): 1,070 sq. ft. (99 m²) really 391 sq ft36 m²
  • Xiaomi Smart Air Purifier 4 Compact It can purify a 48 m² room 2 times per hour (517 sq ft)It can purify a 48 m² room 2 times per hour really 206 sq ft19 m²

Before you buy for 430 sq ft40 m²

What 430 sq ft40 m² looks like

A living room with a dining area: about 18 × 25 ft (5.5 × 7.5 m)about 5.5 × 7.5 m (18 × 25 ft). With a 2.5 m ceiling that's 100 m³ of air to pass through a filter 4.8 times an hour.

How the picks differ

Spare air: 25% for the Levoit EverestAir-P, none for the Blueair Blue Pure 311i Max and 52% for the Blueair Blue Pure 211i Max. The more air to spare, the slower and quieter it can run here to keep up (more on noise).

All of them have a PM2.5 sensor with auto mode. None has an ionizer.

New filters: every 12–15 months for the Levoit EverestAir-P, every 9 months for the Blueair Blue Pure 311i Max and every 9 months for the Blueair Blue Pure 211i Max (filters). The Blueair Blue Pure 311i Max is the most compact at 48.3 cm tall and 3.5 kg; the Levoit EverestAir-P stands 58.9 cm and weighs 9.4 kg.

High ceilings

With a 2.7 m ceiling this room needs 519 m³/h of smoke CADR, with 3 m 576 m³/h. At 3 m only the Levoit EverestAir-P and Blueair Blue Pure 211i Max still cover it. For a high ceiling, look at the 538 sq ft50 m² picks. (Why ceilings matter)

Open-plan

If this room opens onto a kitchen or hall with no door between, count it too. Add 108 sq ft and you're at If this room opens onto a kitchen or hall with no door between, count it too. Add 10 m² and you're at 538 sq ft50 m²: of the picks here, only the Levoit EverestAir-P and Blueair Blue Pure 211i Max still cover it. (Open-plan spaces)

One purifier or two?

In a long or L-shaped room, two smaller units at opposite ends clean more evenly than one. Two Levoit Core 300s, each covering 217 sq ft (20 m²), do the job here (In a long or L-shaped room, two smaller units at opposite ends clean more evenly than one. Two Levoit Core 300s, each covering 20 m² (217 sq ft), do the job here (why two can beat one).

Where to put it

In a living room, put it near the sofa rather than in a corner, with the inlet clear of curtains and furniture. (Where to put it)

How these were chosen

  1. Only models whose verified smoke CADR gives 4.8 air changes an hour in 430 sq ft40 m² with a 2.5 m ceiling: at least 480 m³/h.
  2. Our pick is the smallest model with 25% more air than the room needs, so it needn't run flat out. Each card says why it's there.
  3. We don't test purifiers ourselves. The CADR behind every pick is certified by AHAM; the filter and feature facts are the makers' own, and each model's page links to them.
  4. No prices, and brands can't pay to be included. The full method

Other room sizes

Smaller: 376 sq ft35 m²Bigger: 538 sq ft50 m²

Not exactly 430 sq ft40 m²?

Enter your room and ceiling height. Room pages round up to the next size.