System windows and doors utilize a systems integration approach, developing window and door systems tailored to different regional climates and functional requirements. They are designed, manufactured, and installed according to rigorous procedures, resulting in highly reliable and cost-effective building windows and doors. System windows and doors are an ordered collection of multiple elements and subsystems interacting and depending on each other.
Most people believe that buying high-quality windows and doors only requires focusing on the quality of obvious parts such as aluminum, glass, and accessories, while lacking understanding of the professional performance requirements. They focus more on product quality and cost-effectiveness, initially equating high-quality windows and doors with high-performance windows and doors.
High-quality doors and windows = high-quality profiles + glass + fittings and weatherstripping + processing technology + installation technology + ...
High-performance doors and windows = high-performance profiles × glass × fittings and weatherstripping × processing technology × installation technology × ...
Therefore: High-quality doors and windows ≠ high-performance doors and windows.
As living standards continue to improve, people have clear requirements for the quality and performance of their homes. The energy efficiency, safety, sound insulation, sun protection, comfort, and durability of building doors and windows are receiving increasing attention. When purchasing building doors and windows, in addition to focusing on the quality of obvious parts such as aluminum, glass, and fittings, people are paying more attention to the overall performance achieved by combining these components.
System windows are gradually becoming the preferred choice for many high-end buildings. However, experts also point out that the quality of aluminum alloy doors and windows on the market varies greatly, and careful selection is essential. Inferior aluminum alloy doors and windows are made by blindly selecting aluminum profile series and specifications, with shoddy processing, using sawing instead of milling, and not being installed according to requirements. They have poor sealing performance, are difficult to open and close, and not only leak air and water and experience glass breakage, but also easily have their sliding parts or glass blown or knocked off by strong winds or external forces, causing damage and injury. High-quality aluminum alloy doors and windows, on the other hand, use aluminum profiles whose thickness, strength, and oxide film should meet relevant national standards. The wall thickness should be at least 1.4 mm (the new national standard 8478 recommends an external window wall thickness of ≥1.8 mm), the tensile strength should reach 157 Newtons per square millimeter, the yield strength should reach 108 Newtons per square millimeter, and the oxide film thickness should reach 10 micrometers.
