LANGE boasts a modern 20,000m³ manufacturing facility and is a global leader in high-performance window and door systems. We are equipped with world-class precision technology, including the German Elumatec SBZ 628 CNC Processing Center and the Sigma Fully Automatic Corner Crimping Line, ensuring every joint reaches micron-level accuracy.
Our factory accepts large-volume full-container orders with abundant production capacity and stable lead time. The workshop is fully equipped with imported CNC production equipment. Precision automatic processing covers profile cutting, corner combining, milling and sealing assembly, leading to tiny dimensional tolerance and consistent workmanship across all batches. Stable unified quality reduces installation waste and after-sales risks perfectly, ideal for long-term cooperation on residential apartment and community window projects.
The 9.5mm ultra-slim frame design minimizes visual barriers, offering a 96% light transmittance. Perfectly aligns frame and sash for a symmetrical, high-end aesthetic.
Engineered for the most demanding environments. With Level 9 wind pressure resistance (25,000+ Pa), our windows provide ultimate safety for high-rise buildings and coastal villas.
Featuring 35.3mm ultra-wide thermal break strips and multi-layer EPDM sealing. Reduce noise by up to 37dB and cut energy costs by 40%.
Every LANGE window is processed by German ELUMATEC 628 CNC centers and CGMA automated lines, ensuring micron-level accuracy and lifetime durability.
| Parameter | Specification |
|---|---|
| Brand | LANGE (Top 10 System Window Brand) |
| Frame Visible Width | 9.5 mm (Ultra-Slim Design) |
| Insulation (K-value) | Level 7 (K=1.5 W/(m·K)) |
| Soundproofing (RW) | Level 4 (RW=37 dB) |
| Wind Resistance | Level 9 (P≥25000 Pa, Highest Grade) |
| Watertightness | Level 6 (ΔP≥700 Pa, Highest Grade) |
| Air-tightness | Level 8 (q1≤0.5 m³/h·m²) |
| Glass Config | Triple-Pane Tempered Low-E Glass (Standard) |
| Hardware | German elumatec CNC Machined 304 Stainless Steel |
Benefiting from consistent quality, mass production capacity supported by imported precision equipment and reliable supply service, we have accumulated countless cooperative clients worldwide with numerous genuine verified buyer reviews. A large number of dealers and construction contractors keep placing repeat orders. Our reputation has been verified by massive orders and overseas on-site projects. Our windows are widely recognized for retail restocking and large-scale residential construction projects alike.
Zhengzhou Lange Intelligent Technology Co., Ltd. is a leading integrated enterprise specializing in high-performance system windows and Intelligent Space/Sleep Pods. With 22 years of engineering excellence and 80+sets of CNC equipment, we maintain a 500,000 SQM annual capacity. As a strategic partner of YKK, LIXIL, and LG, we cross-apply premium insulation technology to our "Plug-and-Play" space pods for glamping and commercial use. Guided by craftsmanship, we turn customer expectations into reality with integrity and precision.
Yes, we have our own manufacturing factory with over 22 years of experience, located in Zhengzhou, Henan Province.
No worries. With over 20 years of export experience worldwide, our team provides professional support throughout the clear end-to-end flow: Order confirmation - Production - Shipment - Final delivery.
Yes. Doorway dimensions, number of panels, opening direction, glass configuration, color, lock type, and track type can all be customized according to project requirements. Please provide your doorway width, height, installation location, and on-site photos before ordering, and we will calculate a precise solution based on your actual dimensions.
Delivery time depends on the size, glass configuration, color, hardware, level of customization, and order quantity. Once the design, payment terms, and technical specifications are confirmed, we will provide a formal production plan. For customized projects, it is recommended to allow sufficient time for production, quality inspection, and shipping.
We accept TT (Wire Transfer), online transfer, Credit Card, VISA, PayPal, Apple Pay, and L/C at sight. Standard terms include 100% in advance, or a 30% deposit with the 70% balance settled before shipment, as well as 100% irrevocable L/C at sight.