Question 1

Which is better, Coway Airmega 400S or Honeywell HPA300?

Accepted Answer

Both products scored 8.5/10 in our testing — it's a tie. Choose based on which features matter most to you.

Question 2

Is the Coway Airmega 400S worth it over the Honeywell HPA300?

Accepted Answer

The Coway Airmega 400S scores 8.5/10 while the Honeywell HPA300 scores 8.5/10. The Coway Airmega 400S is our "Best Overall" pick in the Best HEPA Air Purifiers Large Room 2026 category.

Coway Airmega 400S vs Honeywell HPA300: Which to Buy?