Drift window

The upper sash tilts inward 15-30 degrees, enabling "micro-ventilation"—the window remains open even on rainy days (rainwater is blocked by the glass).

Protecting against theft and falling (the opening is only the size of a fist, preventing children from climbing out).

Ensuring gentle airflow (preventing direct cold drafts, ideal for nursery and elderly rooms).Compression-tight seal when closed: Multiple locking points and compression strips provide superior sound insulation and thermal insulation performance compared to conventional sliding windows, rivaling those of casement windows.