Air Purifiers

A purifier is only as good as the air it moves through its filter. The figure to compare is CADR, the clean air delivery rate; the Association of Home Appliance Manufacturers suggests a smoke CADR of at least two-thirds of the room's floor area in square feet.

After that, look at what it costs to keep running — the price and life of the replacement filters — and at how loud it is on the setting you will actually use at night.

Each comparison below lays those numbers side by side for one family and names the model to buy for each room.

All 10 comparisons

• Coway Airmega Mighty Series: Which Mid-Size Purifier to Buy

  Best overall: 233 CADR and 1,748 sq ft of listed coverage at $239.99, only $10 more than the least expensive model here.

  2026-09-23
• Best Levoit Core Air Purifier for Bedrooms and Living Rooms During Smoke and Pollen Season

  Best overall: 141 CFM and 1051 sq ft of coverage with a 22dB low noise level and 23W draw make it the strongest quiet-room balance at $149.99.

  2026-09-23
• Best Levoit Air Purifier for Pet Hair and Dust in Larger Rooms

  Best overall: Purpose-built for pet hair and dander control with 250 CFM and 1,862 sq ft coverage, at $189.99 — $60.00 more than the Eleva 300X.

  2026-09-23
• Best Coway Airmega for an Open-Plan Floor or Whole Apartment During a Smoke Event

  Best overall: Highest CADR in the family at 352 with 2,640 sq ft coverage, and at $339 it is the lowest-priced model here.

  2026-09-22
• Alen BreatheSmart Air Purifiers: Which Size Fits Your Room

  Best overall: Highest airflow in the family at 375 CFM on Turbo, rated 4.85/5 across 1,752 reviews, for $799.

  2026-09-22
• Coway Airmega 100 vs 150 vs 200M vs 250 vs 250S: Which Tower Purifier Fits Your Room?

  Best overall: 246 CADR and 1,748 sq ft coverage at $229.99, only $40.00 more than the Airmega 150.

  2026-09-21
• Blueair Blue Pure Max Series: Which Model Clears a Large Room Fast and Stays Quiet?

  Best overall: 435 CFM CADR and 674 sq ft coverage are the highest in the family, and it still runs at 23 dB on low.

  2026-09-21
• Blueair Signature vs Classic: Which Air Purifier Fits Your Room?

  Best overall: 455 CFM CADR and 705 sq ft coverage in a 13.2 lb body at $449.99, the strongest coverage-to-price balance in the line.

  2026-09-21
• Windmill Air Conditioners and Purifiers: Which One to Buy

  Best overall: Covers 250 sq ft at $289.00 with a 4.8 rating, and it is the only air conditioner in the lineup.

  2026-09-21
• Best Budget Smart Air Purifier for a Bedroom or Office: Dreo 338S vs 530S vs 539AS vs Macro Max AS

  Best value: At $99.99 it is the lowest-priced pick here and still covers 856 sq ft with 6 fan speeds and a 12-hour timer.

  2026-09-20