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Air purifiers ยท Buying guide

Best low-energy air purifiers for rooms of 300 to 500 sq ft with app control

#1 is the DREAME CVF20B. Of the 19 models that fit, it uses the least electricity (149 kWh).

The list

  1. 1

    DREAME CVF20B

    • Electricity per year149 kWh
    • Room size it is rated for347 sq ft
    • Clean air per minute: smoke224 cfm
    • Ozone it gives off0 ppb
  2. 2

    Blueair model 4412311000

    • Electricity per year181 kWh
    • Room size it is rated for498 sq ft
    • Clean air per minute: smoke321 cfm
    • Ozone it gives off1 ppb
  3. 3

    Blueair model 3332111100

    • Electricity per year193 kWh
    • Room size it is rated for439 sq ft
    • Clean air per minute: smoke283 cfm
    • Ozone it gives off2 ppb
  4. 4

    Levoit LAP-C511S-WUS

    • Electricity per year194 kWh
    • Room size it is rated for467 sq ft
    • Clean air per minute: smoke301 cfm
    • Ozone it gives off0 ppb
  5. 5

    Frigidaire FHAP2040A1

    • Electricity per year213 kWh
    • Room size it is rated for372 sq ft
    • Clean air per minute: smoke240 cfm
    • Ozone it gives off0 ppb
  6. 6

    Blueair model 5431111000

    • Electricity per year220 kWh
    • Room size it is rated for335 sq ft
    • Clean air per minute: smoke216 cfm
    • Ozone it gives off1 ppb
  7. 7

    Sharp KCP70UW

    • Electricity per year225 kWh
    • Room size it is rated for395 sq ft
    • Clean air per minute: smoke255 cfm
    • Ozone it gives off1 ppb
  8. 8

    Levoit LAP-C401S-WUSR

    • Electricity per year235 kWh
    • Room size it is rated for363 sq ft
    • Clean air per minute: smoke234 cfm
    • Ozone it gives off1 ppb
  9. 9

    Winix C610

    • Electricity per year235 kWh
    • Room size it is rated for384 sq ft
    • Clean air per minute: smoke248 cfm
    • Ozone it gives off1 ppb
  10. 10

    Winix C710

    • Electricity per year235 kWh
    • Room size it is rated for384 sq ft
    • Clean air per minute: smoke248 cfm
    • Ozone it gives off1 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 with app control. Ranked by electricity per year (lower 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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