Question 1

How do I know for sure this filter set fits my specific Coway AIRMega model?**

Accepted Answer

This set is designed for the AIRMega Max2, 400, 400S, 400(G), and 400S(G) models (part AP-2015-FP). However, the “(G)” variants sometimes have a slightly different pre-filter groove. Double-check your unit’s model number on the back or inside the filter door—if it ends in just “-400” or “-400S” without “(G)”, you’re good to go. When in doubt, measure your current filter's dimensions: this set measures roughly 15.5 x 11 x 2.5 inches.

Question 2

Do these filters actually reduce pet odors and smoke, or just dust?**

Accepted Answer

Yes—many pet owners and vapers report a clear difference within a few days. The activated carbon layer is substantial enough to trap cooking smells, pet dander, and light smoke particles. That said, if you’re dealing with heavy cigarette smoke or strong chemical fumes, you may need to replace the carbon pre-filter wrap more frequently (every 3-4 months) for best results.

Question 3

Can I return one of the two filters if I accidentally ordered the wrong set?**

Accepted Answer

Absolutely—as long as both filters are unopened and still in their original vacuum-sealed packaging. Amazon and most retailers accept returns within 30 days. A tip from the Coway community: open one filter first to confirm fit before unwrapping the second, so you can return the spare if needed.

Question 4

How does the price compare to using cheaper generic filters? Will I lose performance?**

Accepted Answer

Genuine Coway filters cost about 20-30% more than third-party clones, but they guarantee a perfect airtight seal and consistent airflow. Many users who tried cheap generics reported dust bypass (leaking around the frame) and a noticeable drop in air quality readings after 3 months. For most people, the OEM set pays for itself in longevity and reliability.

Question 5

The carbon pre-filter doesn’t sit perfectly flat—did I get a defective product?**

Accepted Answer

Not likely—a slight waviness in the carbon foam is normal and won’t affect performance. The foam is intentionally pliable to create a snug friction fit against the HEPA frame. If it’s really bulging, try gently pressing it flat with your hands for 10 seconds before installing. If it still won’t seat properly, contact support—Coway is known for hassle-free replacements.

400/400S Replacement Filter for Coway AIRMEGA Max2 400 400S 400(G) 400S(G) Air Purifie-r, Max2 Green HEPA and Active Carbon Filter Set, AP-2015-FP, 2 Set

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