![Coway swept three categories at the 2026 Korea Customer Satisfaction Index survey. At the awards ceremony held Wednesday at the Shilla Hotel in Jung-gu, Seoul, Shim Byung-hee, head of Coway's marketing division (right), and Han Su-hee, CEO of Korea Management Association Consulting, pose for a photo. [Coway]](https://wimg.heraldcorp.com/news/cms/2026/10/01/news-p.v1.20261001.ff318a9b64e24ee1a133e55810de53ac_P1.jpg)
KMAC's 2026 Korea Customer Satisfaction Index results
Coway tops water purifiers for 10th consecutive year; Kyung Dong Navien leads boilers for 13th straight year
LX Hausys claims No. 1 in home building materials for sixth year running
Coway, Kyung Dong Navien and LX Hausys have each topped their core product categories in Korea Management Association Consulting's 2026 Korea Customer Satisfaction Index, known as KCSI. All three companies have held their respective No. 1 positions for multiple consecutive years, building long-running records in the survey.
Coway claimed first place in three categories: water purifiers, beds and bidets. The company has led the water purifier category for 10 consecutive years, the bed category for six consecutive years and the bidet category for two consecutive years.
In water purifiers, Coway's expansion of its ice-dispensing purifier lineup was cited as a key competitive strength. In beds, the company has been broadening its product range under its sleep and healing-care brand Virex, combining massage and stretching functions. Its bidet products feature a splash-absorption system designed to reduce water droplet scatter and the spread of bacteria.
![[Kyung Dong Navien]](https://wimg.heraldcorp.com/news/cms/2026/10/01/news-p.v1.20261001.286dd2c0388444a0a3df5a47003a18b2_P1.jpg)
Kyung Dong Navien topped the boiler category for the 13th consecutive year. The company has been focusing on integrating AI and subscription-based management services with its boilers' heating and hot-water performance.
Its flagship product, the Navien Condensing ON AI, uses an AI server to analyze each user's hot-water usage patterns and adjust the supply to match peak usage times. Subscription customers receive an annual visit from a certified "Navien Partner" technician, who inspects the flue, alarms and thermal efficiency, and performs services such as replacing the heating-water filter and cleaning the siphon.
![LX Hausys 'Discovery of Your Style' [LX Hausys]](https://wimg.heraldcorp.com/news/cms/2026/10/01/news-p.v1.20261001.3ece74d5bbde41e0bb73444a014260e0_P1.jpg)
LX Hausys topped the home building materials category for the sixth consecutive year. The company has expanded customer touchpoints across product development, purchasing, installation and after-sales service under its interior brand LX Z:IN.
In the second half of this year, LX Hausys strengthened its interior solutions under the theme "Discovery of Your Style," allowing customers to choose from a range of colors, materials, textures and finishes. The company operates a dedicated exhibition space reflecting this concept at its LX Z:IN flagship store in Gangnam-gu, Seoul, and also runs the LX Z:IN Interior Academy to train professional installation personnel.
The KCSI is a survey measuring customer satisfaction with products and services across domestic industries and has been conducted since 1992.
hong@heraldcorp.com
