About Coway
Coway was founded in 1989 in Seoul, South Korea, and grew quickly on home water and air treatment, reaching the number one spot in Korea's air purifier and water filter markets by 1999. The company is publicly listed on the Korea Exchange and today runs subsidiaries across the United States, Malaysia, Thailand, Indonesia, Vietnam, Japan, and Europe, alongside its Coway USA presence built around the Airmega air purifier line, Bidetmega bidets, and a smaller range of fans and filters.
Coway's air purifiers carry some of the most sustained third-party recognition in the category: Wirecutter named the Airmega Mighty (AP-1512HH) its top air purifier pick for ten consecutive years, and the line has also been featured by Consumer Reports, Architectural Digest, GQ, and Wired. The Airmega range has also picked up Red Dot Design Award recognition for 17 consecutive years. In our own testing on DIYRated, the Airmega AP-1512HH's 4-stage filtration and Eco Mode auto-shutoff stood out for keeping long-term filter costs the lowest of any purifier we reviewed.
Brand website: cowaymega.com
What Coway makes
Coway's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Airmega air purifiers
the Mighty, Mighty2, Halo, and numbered 250-400 series plus the ProX — featured on DIYRated — featured on DIYRated
Bidetmega bidets
200N, 400S, and 500S bidet seat models
Fans
pedestal and table fans including the P50 and AIM lines
Filters & accessories
replacement air purifier, bidet, and water purifier filters
Why we recognized Coway
The DIYRated Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our hands-on category reviews. Coway earned it on the strength of the products below, evaluated the same way every product on this site is: bought, put to work on real jobs, and judged on merit.
Coway products we rated highly
Coway Airmega AP-1512HH
Wirecutter's air purifier pick for over a decade running, and in our own review its 4-stage filtration (pre-filter, deodorization carbon, True HEPA, and Vital Ion) was the most thorough treatment path in the roundup. Eco Mode shuts the fan down automatically when the air stays clean for 30 minutes and restarts it once particles return, which in our testing translated into the lowest long-term filter replacement costs of any purifier we reviewed: a 12-month HEPA filter and a 6-month carbon filter, both at reasonable prices. It carries a 4.6-star rating in our review.
Read the 7 Best Air Purifiers for Home in 2026 guide →What earned Coway the recognition
- Founded in 1989 in Seoul, South Korea, and reached the number one spot in Korea's air purifier and water filter markets by 1999.
- The Airmega Mighty (AP-1512HH) has been Wirecutter's air purifier pick for ten consecutive years, one of the longest-running recommendations in the category.
- In our own testing, the Airmega AP-1512HH's 4-stage filtration and Eco Mode auto-shutoff produced the lowest long-term filter replacement costs of any purifier in our roundup.
- The Airmega line has received Red Dot Design Award recognition for 17 consecutive years.
- Also covered by Consumer Reports, Architectural Digest, GQ, and Wired for its air purifier lineup.