Air tightness:
Grade 7
Water tightness:
Grade 3
Wind pressure resistance:
Grade 9
Air sound insulation performance:
Level 3
Thermal insulation performance:
K=1.76W/(m2. K)
Anti corrosion performance of accessories:
Grade 5
Number of opening and closing:
Level 3 (200,000 times)
S
afety precautions for carrying capacity:
Meet the requirements
Quality management:
ISO9001 quality system certification