400/400S Replacement Filter for Coway AIRMEGA Max2 - HEPA + Carbon Set

Our review of the 400/400S Replacement Filter for the Coway AIRMEGA Max2 finds it is a straightforward, effective option for anyone who needs to restore their purifier's performance without spending on an OEM set. The kit ships as a two-in-one replacement with a high efficiency HEPA layer and an active carbon element; the single biggest reason to buy is simple: it restores particle and odor removal capabilities quickly and installs in minutes, so rooms with pets or cooking fumes become noticeably fresher. This review focuses on real-world fit, filtration performance, and ease of use.

Key Features

• Compatibility: Designed to fit Coway AIRMEGA Max2 400 and 400S models, the filter uses the correct form factor and part reference to replace the factory unit without modification.
• Two-stage filtration: The combined HEPA and active carbon construction captures fine particles and removes common household odors for more complete air cleaning.
• High particle capture: The HEPA element is rated to remove 99.97% of airborne particles down to 0.3 microns, which helps cut pollen, pet dander and dust.
• Odor control: The active carbon layer addresses smells from pets, cooking and smoke, plus many volatile organic compounds to reduce noticeable odors in living spaces.
• Easy installation: The filters slip into the Max2 housing in place of the old unit and require no tools; the pack dimensions ensure a snug, correct fit.
• Responsible materials: The filter media includes FSC-Certified paper, indicating attention to sustainable sourcing for the paper components.

Who It's For

The 400/400S replacement set is best for owners of the Coway AIRMEGA Max2 400 and 400S units who want a cost-effective way to regain original filtration performance and remove common household odors. It is a practical choice for households with pets, light smokers, or frequent cooking where both particle removal and odor reduction matter.

Those who need an exact OEM branded part number for warranty reasons or who require specialty chemical adsorption beyond standard activated carbon should verify compatibility or consult the purifier manufacturer. Users expecting medical-grade or industrial gas scrubbing should look to dedicated specialized filters.

Pros & Cons

Pros

• Good fit and straightforward installation restores the purifier to working order quickly.
• HEPA element effectively captures common fine particles such as pollen and pet dander.
• Active carbon layer noticeably reduces common household odors like cooking and pet smells.
• Affordable alternative to OEM replacements with durable construction.

Cons

• Some users report a transient or unusual new-filter smell, so allow time for airing if concerned.
• Carbon life depends on exposure; replacing the carbon filter every 10 to 14 months is recommended for best odor control.

Specifications

Compatible models	Coway AIRMEGA Max2 400, 400S, 400(G), 400S(G)
Filter type	HEPA plus Active Carbon two-stage set
Particle efficiency	HEPA captures up to 99.97% at 0.3 microns
Odor reduction	Active carbon removes common odors and some VOCs
Dimensions	14.37 in x 11.02 in x 1.77 in
Suggested carbon replacement	Every 10-14 months depending on use
Materials	Includes FSC-Certified paper

Our Verdict

For Max2 owners who need reliable particle capture and routine odor control at an affordable price, this replacement set delivers solid value and restores purifier performance with minimal fuss. It is a sensible buy for most home users, especially those with pets or cooking odors, provided the small possibility of a new-filter smell is acceptable and routine carbon replacement is followed.

Frequently Asked Questions

Will this fit my Max2 purifier?
Yes, the set is made for Coway AIRMEGA Max2 400 and 400S series models and replaces the original filter form factor.

How often should I change the filters?
HEPA longevity varies but the carbon component is recommended to be replaced every 10 to 14 months for maintained odor control.

Do these filters remove pet dander and cooking smells?
Yes, the HEPA layer captures pet dander and the active carbon layer reduces common cooking and pet odors and many VOCs.