400/400S Replacement Filter for Coway AIRMEGA Max2 400 400S Air Purifier

I purchased this replacement filter set for my Coway Airmega 400/400S, and I am extremely impressed with the quality. The fit is perfect — it slides into the unit just like the original filter, locks in securely, and the purifier recognized it immediately without any issues. No forcing, no adjusting, no gaps. Truly hassle-free.The filtration performance is outstanding. The H13 True HEPA layer is dense and well-built, and you can feel the difference in airflow and clarity once the purifier starts running. It captures fine dust, allergens, and pet dander effectively, and the activated carbon layer is strong enough to noticeably reduce odors from cooking, pets, and general indoor air. The air in the room feels cleaner and fresher within a short time.One of the biggest advantages is the value. Getting a full set of premium HEPA + activated carbon filters at this price is honestly incredible. The OEM Coway filters cost significantly more, yet these replacements perform just as well — a major benefit if you maintain multiple Airmega units or live in an area with higher dust or pollution levels. For the quality you get, the price is extremely competitive.Installation is as easy as it gets. It takes less than a minute to remove the old filter and drop in the new one. No tools, no complications.The packaging is solid, the filters arrive clean and well-protected, and the company clearly stands behind the product with responsive customer service.Bottom line:This is a perfect replacement for the Coway Airmega 400/400S. Excellent fit, excellent filtration, excellent pricing. If you want fresh, clean air without paying premium OEM prices, this is absolutely the filter set to buy.

These are very high quality in both fit and finish and seem to work perfectly in my 400S units. Its difficult to measure effectiveness relative to the AIRMEGA brand filters, but based on quality of construction and materials, I believe they serve their intended function effectively.

high high quality filters. the only place i go to buy repacement filters.

fast service, good fit, worked as advertised

Works wellEase of use