Model compatibility ledger

Coway Airmega 400 replacement filter

Use this model page to match the purifier body label to the OEM filter SKU, compatible alternatives, sizing notes, and retailer listings before ordering.

OEM filter SKU

Airmega Max2 400

Replacement interval

Every 12 months

Annual filter estimate

$95-$180

OEM filter first

Coway Airmega 400 Max2 Filter Set

Large room Airmega purifier using two side filter assemblies.

Model numbers: Airmega 400, Airmega 400S
Aliases: Coway Airmega 400S filter
Dimensions: Two side filter assemblies for Airmega 400 / 400S.

Last reviewed 2026-05-29. Match both purifier model and filter SKU because retailers often group similar cartridges together.

OEM and compatible filter comparison

OEM entries are shown first. Compatible alternatives are not manufacturer-approved unless marked OEM.

Check	OEM filter	Compatible option
Manufacturer-recommended filter	Airmega Max2 400 · Coway Airmega 400 Max2 Filter Set	Airmega Max2 400 · Coway Airmega 400 Max2 Filter Set Two side filter assemblies for Airmega 400 / 400S. Annual estimate: $95-$180.

Retailer options for Airmega Max2 400

Amazon

Coway Airmega 400 Max2 filter

Varies by listing

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Availability note: Use the SKU and model notes here to confirm fit before checkout.
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Check retailer listing

Verify the purifier model and filter SKU on the retailer page before ordering.

Walmart

Coway Airmega 400 filter