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Air purifiers for an 861 sq ft roomAir purifiers for an 80 m² room

Needs 960 m³/h (566 CFM) of smoke CADR. Why? 80 m²861 sq ft · A whole small flat, or a classroom

Picked by the BuyBySpecs Team

BuyBySpecs on YouTube · sources checked 1 Nov 2026

The one purifier that covers it

Our pickAHAM verified

Medify MA-112

Medify Air · MA-112

Really cleans
905 sq ft84 m² 84 m²905 sq ft
New filter
every 4 months
See it on Amazon: Medify MA-112

Covers 905 sq ft84 m² (84 m²905 sq ft) · 5% spare

Why it's here: Nothing verified has much air to spare at this size: this is the smallest that covers it.

Specs, sources and trade-offs

Or split it between two

Smaller units spread around the room clean it more evenly than one big one, and each can run on a slower, quieter speed. Noise is per unit: two at the same level sound about 3 dB louder together.

Fewest unitsAHAM verified

2 × Blueair Blue Pure 311i Max

Blueair · Blue Pure 311i Max (3332111100)

Each cleans
431 sq ft40 m² 40 m²431 sq ft
New filter
every 9 months
See it on Amazon: Blueair Blue Pure 311i Max

2 units cover 862 sq ft80 m² (80 m²862 sq ft) · no spare

Why it's here: The fewest purifiers that do it: 2 units, each cleaning its 431 sq ft share.The fewest purifiers that do it: 2 units, each cleaning its 40 m² share.

Specs, sources and trade-offs

The box says yes. The maths says no.

These are sold as big enough for 861 sq ft80 m², but at 4.8 air changes an hour they aren't.

  • Coway Airmega 400S Purifies 3,120 ft² in 60 minsPurifies 3,120 ft² in 60 mins (290 m²) really 499 sq ft46 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 350 Purifies 2,640ft² in 60 minsPurifies 2,640ft² in 60 mins (245 m²) really 536 sq ft49 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
  • Levoit EverestAir-P Changes the air in a 2635 ft2 room once per hourChanges the air in a 2635 ft2 room once per hour (245 m²) really 539 sq ft50 m²
  • Levoit Core 600S-P Changes the air in a 2909 ft2 room once per hourChanges the air in a 2909 ft2 room once per hour (270 m²) really 595 sq ft55 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 9800 Also cleans rooms up to 2,506 sq ft in 1 hourAlso cleans rooms up to 2,506 sq ft in 1 hour (233 m²) really 513 sq ft47 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

Before you buy for 861 sq ft80 m²

What 861 sq ft80 m² looks like

A whole small flat, or a classroom: about 26 × 33 ft (8 × 10 m)about 8 × 10 m (26 × 33 ft). With a 2.5 m ceiling that's 200 m³ of air to pass through a filter 4.8 times an hour.

High ceilings

With a 2.7 m ceiling this room needs 1,037 m³/h of smoke CADR, with 3 m 1,152 m³/h. Neither height is covered by the pick here. For a high ceiling, look at the 1,076 sq ft100 m² picks. (Why ceilings matter)

Open-plan

If this room opens onto a kitchen or hall with no door between, count it too. Add 215 sq ft and you're at If this room opens onto a kitchen or hall with no door between, count it too. Add 20 m² and you're at 1,076 sq ft100 m²: the pick here doesn’t cover that. (Open-plan spaces)

Where to put it

For a whole flat, classroom or office floor, one unit per room or zone beats one big unit in the hall: doors stop the air. (Where to put it)

How these were chosen

  1. Only models whose verified smoke CADR gives 4.8 air changes an hour in 861 sq ft80 m² with a 2.5 m ceiling: at least 960 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: 645 sq ft60 m²Bigger: 1,076 sq ft100 m²

Not exactly 861 sq ft80 m²?

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