2. Sound insulation performance: the sound insulation effect can reach 40 decibels;
3. Thermal insulation performance: heat transfer coefficient k ≤ 2.0w/m2.k.
4. Airtightness: Airtightness is not lower than Grade 4;
5. Fire resistance: fire resistance time is 1.50 h;
6. Durability: Through repeated opening and closing for 500,000 times.
Special point
1. Various decorative patterns of door panels can be provided to meet the requirements of different decorative styles.
2. The outdoor side of the door leaf is made of cast aluminum, and the inner side is made of wood veneer. Ingeniously apply different materials together.
3, equipped with multifunctional hinges, strong bearing capacity.
4.Multiple sealing structures are arranged at the lap joint of frame and fan, which has good sound insulation and sealing effect.