UPVC windows can be configured in a variety of window styles, providing an efficient ventilation system and efficient airflow into the room. An effective window configuration is called “tilt and turn”, which consists of two window arrangements that can be opened in two independent directions, providing draft-free ventilation.When in the inward-angled position, hot air can escape through openings on the top and sides, while opening the windows all the way can quickly ventilate the air throughout the room, helping with cleaning or refreshing.