Best low-energy air purifiers for rooms over 500 sq ft with an air quality sensor

The list

1. 1

   Blueair model 3432111100

   • Electricity per year227 kWh
   • Room size it is rated for525 sq ft
   • Clean air per minute: smoke339 cfm
   • Ozone it gives off2 ppb
2. 2

   Coway AP-3018B

   • Electricity per year235 kWh
   • Room size it is rated for640 sq ft
   • Clean air per minute: smoke413 cfm
   • Ozone it gives off0 ppb
3. 3

   Bosch Air 6000

   • Electricity per year289 kWh
   • Room size it is rated for525 sq ft
   • Clean air per minute: smoke339 cfm
   • Ozone it gives off0 ppb
4. 4

   IQAir ATEM E

   • Electricity per year295 kWh
   • Room size it is rated for572 sq ft
   • Clean air per minute: smoke369 cfm
   • Ozone it gives off0 ppb
5. 5

   Alen BreatheSmart 75i_V2

   • Electricity per year304 kWh
   • Room size it is rated for574 sq ft
   • Clean air per minute: smoke370 cfm
   • Ozone it gives off1 ppb
6. 6

   Cuckoo CAC-D2020FW

   • Electricity per year316 kWh
   • Room size it is rated for592 sq ft
   • Clean air per minute: smoke382 cfm
   • Ozone it gives off0 ppb
7. 7

   Coway Airmega ProX

   • Electricity per year335 kWh
   • Room size it is rated for894 sq ft
   • Clean air per minute: smoke577 cfm
   • Ozone it gives off0 ppb
8. 8

   Midea KJ600G-RX600A

   • Electricity per year341 kWh
   • Room size it is rated for567 sq ft
   • Clean air per minute: smoke366 cfm
   • Ozone it gives off0 ppb
9. 9

   PURECODE PAR001

   • Electricity per year341 kWh
   • Room size it is rated for567 sq ft
   • Clean air per minute: smoke366 cfm
   • Ozone it gives off0 ppb
10. 10

    Coway Airmega 350

    • Electricity per year344 kWh
    • Room size it is rated for558 sq ft
    • Clean air per minute: smoke360 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 over 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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