Coway Airmega AP-1512HH Mighty vs Levoit Core 400S

For most allergy sufferers the Coway Mighty remains the smart-money buy: proven allergen removal, the cheapest OEM filters, and a decade as the go-to top pick. Pay up for the Levoit Core 400S if you want app control, real-time PM2.5 data, quieter high speeds, and a bit more coverage. The Winix 5500-2 is an excellent performer and the value play if you can still find it - but its US/Canada discontinuation makes it a conditional pick.

Coway Airmega AP-1512HH Mighty

Buy it

The decade-long top pick that still posts strong test numbers at a fair price.

• True HEPA plus washable pre-filter and carbon deodorization
• Among the cheapest replacement filters (~$40/yr)
• Cleared the test room in 26 min at top speed
• Effective auto mode with air-quality sensor and a carry handle

• More power-hungry than similar performers (~$84/yr energy)
• No app or child lock
• Rated only to ~361 sq ft

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Levoit Core 400S

Buy it

The smart pick: laser air-quality sensor, real-time PM2.5, and app scheduling.

• True HEPA with high smoke CADR and the largest coverage here (~373–403 sq ft)
• VeSync app: real-time PM2.5, auto mode, scheduling, filter tracking
• Quiet on low speeds (~24 dB)
• No ozone-producing ionizer

• Higher long-term filter cost (~$120/yr)
• In bench testing it was slower than the Coway at top speed
• App/account requirement is a mild annoyance for a simple appliance

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Side by side

The bottom line

Our overall pick is the Coway Airmega AP-1512HH Mighty - The decade-long top pick that still posts strong test numbers at a fair price. Choose the Levoit Core 400S instead if people who want data, automation, and app control in a medium-to-large room.

Want the full picture, including the other options we compared and the popular one we'd skip? Read the complete The Best HEPA Air Purifiers for Allergies Under $250.