1. Ventilation: Our inward opening and folding windows facilitate natural air circulation, keeping your indoor air fresh.

2. Security: Fixed window sash ensures stability and offers anti-theft performance for added peace of mind.

3. Space-saving: Inward opening design saves indoor space, requiring only a 30° to 40° opening angle.

4. Sealing and insulation: Enjoy excellent sealing and insulation effects for enhanced comfort.