CERTIFICATIONS & TECHNOLOGY

Certifications & Technology

CERTIFICATIONS

Certifications

Business & Construction Business Registration

Business Reg. No. 478-87-00897 (Corporate Reg. No. 175211-0059050)

Construction Business License — Metal Structure & Window Construction, Chilgok, Gyeongbuk 2018-7-04

Factory Registration / Direct Production Certificate

Factory registered Mar. 7, 2024 · Industry: Metal Door, Window & Shutter Manufacturing (25111)

Direct Production Certificate No. 2022-0587-00281 (Item: Metal Windows)

Disabled-Owned Business Certificate

Issued by the Ministry of SMEs and Startups

No. 0013-2024-03685 · Valid Oct. 10, 2024 – Oct. 9, 2027

Small Business (Small Enterprise) Certificate

No. 0010-2026-220401 · Issued by the Ministry of SMEs and Startups

Valid Apr. 1, 2026 – Mar. 31, 2027

Eco-Label Certificate

Korea Environmental Industry & Technology Institute · Product EL250, Windows & Window Accessories · Reason: Energy Savings, Reduced Hazardous Substances

No. 31151 / No. 26257 / No. 33640 (each valid 3 years, through Aug. 6, 2028 at latest)

Efficiency Management Equipment Report (Energy Efficiency Grade 1)

Reported to Korea Energy Agency · Ref. No. 144214524 · Dec. 14, 2021

Applicable models: Insulated Double / Triple-Rail / Quad-Rail Sliding Windows, Insulated Project / Casement Windows (39mm) and 5 models in total

TECHNOLOGY

Technology

1

Insulated Glass & Polyamide Bars

Insulated glass and polyamide materials deliver excellent thermal and airtight performance.

2

Thermal Grade 1–2, Airtightness Grade 1

Superior thermal (grade 1–2) and airtightness (grade 1) performance maximize energy savings and efficiency.

3

Precision Design & High-Performance Materials

Precise design and high-performance raw/sub materials deliver excellent operability and durability.

4

Versatile Site Application

Product specifications applicable to public offices, schools, commercial facilities and more.

CUSTOMER SUPPORT

Customer Support Services

Yeongnam Changho Industry's goal is 'the highest quality'.

Quotation Support

We help configure products and calculate quotations suited to site conditions.

Shop Drawings

We provide detailed shop drawings needed for on-site construction.

Design Support

We help select appropriate window specifications during the design stage.

Structural Review

We support structural review according to on-site conditions.