LX Hausys's LX Z:IN windows, which rank first in the national customer satisfaction survey for windows, are displayed. /Courtesy of LX Hausys

LX Hausys said on the 15th that it was selected as the No. 1 company in the window and door category in the 2025 National Customer Satisfaction Index (NCSI) survey.

The NCSI survey is a customer satisfaction measurement index jointly developed by the Korea Productivity Center and the University of Michigan in the United States. Since 1998, it has been used worldwide as a customer satisfaction evaluation index recognized for its credibility.

This is the first time the window and door category has been included in the NCSI survey, and LX Hausys took the first top spot in this category.

LX Z:IN windows and doors received high marks for: ▲ excellent fundamental performance for insulation and airtightness ▲ a differentiated design with thin window frames ▲ an exterior and colors that naturally match various interior products ▲ outstanding durability.

LX Hausys's flagship window and door product is LX Z:IN Window View Frame. The View Frame window and door is a product that conveys the idea of offering a wider view through a slimmer window frame (sash + frame) than before. With a bezel-less design in which the frame is barely visible, it delivers a strong sense of openness and offers a new outside view, gaining strong popularity.

In particular, the View Frame window and door features a multi-chamber structural design that enhances insulation in both the sash and the frame, providing excellent thermal performance. For double windows and doors with View Frame, even a single pane of low-E glass (26∙28 mm) meets energy consumption efficiency grade 1.

Meticulous installation service is another reason for the popularity of the View Frame window and door. With strong installation quality capabilities, it consistently maintains the sturdiness of the window and door, allowing consumers to avoid inconvenience over time and experience a changed daily life.

An LX Hausys official said, "We plan to continue improving customer satisfaction from the production of perfectly quality windows and doors to installation and after-sales service," adding, "By leveraging LX Hausys's differentiated technology and design, we will continue to introduce window and door products that move customers and lead the market."

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