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1. Reduce noise for 25-35db.
2. Section bar heat transferring K value can reach 1.2 and below, whole window heat transferring K value can reach below 2.0.
3. Section bar structure: Five-mode cavity, three-sealed, the thickness of wall is 3mm, high intensity and anti-wind pressure.
4. Sealed material: adopt rubber and sealed rubber bar with excellent sealed capability.
5. ROTO hardware parts, ease to operation, safe and reliable.
6. Equipped with double-deck middle empty glass, excellent capability of sound insulation and heat insulation.
7. Special using directions, technical index reaches the standard of European.