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Air purifiers ยท Buying guide

Best low-energy air purifiers for rooms of 300 to 500 sq ft with an air quality sensor

#1 is the Honeywell HPA4300B. Of the 28 models that fit, it uses the least electricity (185 kWh).

The list

  1. 1

    Honeywell HPA4300B

    • Electricity per year185 kWh
    • Room size it is rated for355 sq ft
    • Clean air per minute: smoke229 cfm
    • Ozone it gives off0 ppb
  2. 2

    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
  3. 3

    LAGO LAPKJ350GS1BLK

    • Electricity per year202 kWh
    • Room size it is rated for322 sq ft
    • Clean air per minute: smoke208 cfm
    • Ozone it gives off0 ppb
  4. 4

    Midea 793K19A

    • Electricity per year202 kWh
    • Room size it is rated for322 sq ft
    • Clean air per minute: smoke208 cfm
    • Ozone it gives off0 ppb
  5. 5

    Midea KJ350G-S1

    • Electricity per year202 kWh
    • Room size it is rated for322 sq ft
    • Clean air per minute: smoke208 cfm
    • Ozone it gives off0 ppb
  6. 6

    PURE CODE APU-S1WUS

    • Electricity per year202 kWh
    • Room size it is rated for322 sq ft
    • Clean air per minute: smoke208 cfm
    • Ozone it gives off0 ppb
  7. 7

    TaoTronics TT-AP003

    • Electricity per year202 kWh
    • Room size it is rated for322 sq ft
    • Clean air per minute: smoke208 cfm
    • Ozone it gives off0 ppb
  8. 8

    Danby DAP290BAW

    • Electricity per year218 kWh
    • Room size it is rated for470 sq ft
    • Clean air per minute: smoke303 cfm
    • Ozone it gives off0 ppb
  9. 9

    LAGO LAPKJ500GTB32

    • Electricity per year218 kWh
    • Room size it is rated for470 sq ft
    • Clean air per minute: smoke303 cfm
    • Ozone it gives off0 ppb
  10. 10

    Midea 793K20A

    • Electricity per year218 kWh
    • Room size it is rated for470 sq ft
    • Clean air per minute: smoke303 cfm
    • 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 with an air quality sensor. 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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