Duels

• Coway AP-1512HH vs Blueair 311i Max: airflow per watt

  The short answer. The Blueair Blue Pure 311i Max is best for rooms of 300 to 440 square feet, low power draw, a quiet floor and app control. The Coway Airmega AP-1512HH Mighty is best for buyers who want a three-year motor warranty without registration, a printed filter schedule and no Wi-Fi. Winner on the full sheet: the Blueair, which publishes 50 to 125 CFM more on every pollutant row, covers 78 more square feet at 4.8 air changes an hour, draws 45 W less and costs $10 less. The Coway wins the warranty row and the deodorisation filter row. This duel is a documentation review built from cowaymega.com and blueair.com pages checked October 10, 2026. No lab tests, no sponsored rows.

• Levoit Core 300S vs Coway AP-1512HH: which room size

  The short answer. The Levoit Core 300S is best for rooms under 220 square feet, a $150 budget and app control. The Coway Airmega AP-1512HH Mighty is best for rooms of 250 to 360 square feet, a printed filter schedule and a three-year motor warranty. Winner on the full sheet: the Coway, because it publishes three CADR figures that are 65 to 105 CFM higher and covers 142 more square feet at 4.8 air changes an hour. The Levoit wins the power, weight, noise floor and price rows. This duel is a documentation review: every figure comes from levoit.com and cowaymega.com pages checked October 10, 2026. No lab tests, no sponsored rows.