What is the best air purifier for allergies?

Best overall: Coway Airmega AP-1512HH Mighty. For most allergy sufferers, it’s the safest pick because it combines a true HEPA-style particle filter, strong room performance, auto mode, and reasonable filter upkeep in a compact unit. Put it in the bedroom or main room where you spend the most time, size it to the room, and run it continuously during allergy season.

If your room is larger, choose Blueair Blue Pure 311i Max or Coway Airmega 250 instead. If you want a smaller, lower-cost option for a bedroom, Levoit Core 300S is a strong alternative.

Key buying tip: for allergies, prioritize CADR/room size, HEPA-grade particle filtration, quiet operation on medium/low, and replacement-filter cost. Avoid relying on ionizers or “air sanitizing” claims as the main allergy solution.