Casement windows hinge at the side to capture breezes, widening for ventilation, simple cleansing, and egress

https://wiki-neon.win/index.php/What_Upvc_Doors_With_Windows_Experts_Want_You_To_Be_Educated

Casement windows hinge at the side to catch breezes, opening wide for ventilation, simple cleansing, and egress, with compression seals that boost energy efficiency.