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Air purifiers ยท Buying guide

Best air purifiers for rooms of 300 to 500 sq ft

#1 is the Blueair model 4412311000. Of the 56 models that fit, it cleans smoke from the air fastest (321 cfm).

The list

  1. 1

    Blueair model 4412311000

    • Clean air per minute: smoke321 cfm
    • Room size it is rated for498 sq ft
    • Electricity per year181 kWh
    • Ozone it gives off1 ppb
  2. 2

    Atmosphere Sky 120539

    • Clean air per minute: smoke316 cfm
    • Room size it is rated for490 sq ft
    • Electricity per year298 kWh
    • Ozone it gives off0 ppb
  3. 3

    Coway Airmega 300

    • Clean air per minute: smoke315 cfm
    • Room size it is rated for488 sq ft
    • Electricity per year314 kWh
    • Ozone it gives off0 ppb
  4. 4

    Midea CAF-Z85US

    • Clean air per minute: smoke312 cfm
    • Room size it is rated for484 sq ft
    • Electricity per year259 kWh
    • Ozone it gives off0 ppb
  5. 5

    Toshiba CAF-Z85US

    • Clean air per minute: smoke312 cfm
    • Room size it is rated for484 sq ft
    • Electricity per year259 kWh
    • Ozone it gives off0 ppb
  6. 6

    Rainbow Luggable XXL

    • Clean air per minute: smoke306 cfm
    • Room size it is rated for474 sq ft
    • Electricity per year75 kWh
    • Ozone it gives off0 ppb
  7. 7

    Midea KJ500G-L1

    • Clean air per minute: smoke306 cfm
    • Room size it is rated for474 sq ft
    • Electricity per year297 kWh
    • Ozone it gives off0 ppb
  8. 8

    Noma model 143-0033-2

    • Clean air per minute: smoke306 cfm
    • Room size it is rated for474 sq ft
    • Electricity per year297 kWh
    • Ozone it gives off0 ppb
  9. 9

    okaysou AirMac X7

    • Clean air per minute: smoke306 cfm
    • Room size it is rated for474 sq ft
    • Electricity per year297 kWh
    • Ozone it gives off0 ppb
  10. 10

    Cuckoo CAC-K1910FW

    • Clean air per minute: smoke306 cfm
    • Room size it is rated for474 sq ft
    • Electricity per year325 kWh
    • Ozone it gives off0 ppb

How this list is made

We start from every air purifier certified by ENERGY STAR and sold in the US (206 models). Models shown: rated for rooms of 300 to 500 sq ft. Ranked by clean air per minute: smoke (higher is better). Ties go to the one that uses less electricity.

Data: ENERGY STAR certified products list, checked 2026-11-09. We have not tested these products ourselves.

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