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Air purifiers ยท Buying guide

Best air purifiers for rooms of 300 to 500 sq ft rated most efficient

#1 is the Blueair model 4412311000. Of the 5 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

    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
  3. 3

    Levoit LAP-C511S-WUS

    • Clean air per minute: smoke301 cfm
    • Room size it is rated for467 sq ft
    • Electricity per year194 kWh
    • Ozone it gives off0 ppb
  4. 4

    Rainbow Luggable Ultra

    • Clean air per minute: smoke231 cfm
    • Room size it is rated for358 sq ft
    • Electricity per year93 kWh
    • Ozone it gives off0 ppb
  5. 5

    DREAME CVF20B

    • Clean air per minute: smoke224 cfm
    • Room size it is rated for347 sq ft
    • Electricity per year149 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 and rated most efficient. 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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