Aluminum alloy door window is the configuration of general residential foundation, also is the important factor that affects day lighting, ventilation and comfort.  

Have you learned about the design standard of aluminum sliding door for kitchen?  

In general residential buildings, the window sill height is not less than 0.9m. When the window sill height is less than 0.8m, protective measures should be taken.  In public buildings, the window sill height varies from 1.0 to 1.8m, and the sash opening to the public walkway should not be lower than 2.0m.