In Europe, inward-opening and tilted-in windows are highly favored and widely used. By operating the handle, the corresponding transmission of the hardware transmission (or "hardware system" for better expression, but keeping close to original with "hardware transmission" as a component action) rods (or "bars/mechanisms", here "rods" is used for simplicity) is activated, allowing the window sash to either open flat inward or tilt inward at a certain angle for ventilation.

In most cases, the window sash can be set in the tilted mode to avoid direct wind exposure, creating a naturally gentle ventilation state indoors.

Under special circumstances, such as when rapid ventilation is needed, the window can be opened flat towards the indoor side. Additionally, with the window sash located indoors, cleaning the windows becomes more convenient and safer.

Features: Mature and stable performance: It boasts excellent water tightness, air tightness, and wind pressure resistance, while also providing thermal insulation, heat preservation (the original meaning includes both, here "thermal insulation" covers the idea, but "heat preservation and insulation" could be split; however, for conciseness, "thermal insulation" is used to encompass both in a broader sense, but if precision is needed, "excellent in water tightness, air tightness, wind pressure resistance, as well as thermal and sound insulation" can be used - here the latter is adopted for clarity), and sound insulation.

Applications:
Suitable for various residential and commercial building projects, as well as new construction and renovation projects.