An opening on the upper side of a wall that allows the circulation of air and lights for cirulation of air and light
Answers
Day lighting is the practice of placing windows, other openings, and reflective surfaces so that sunlight (direct or indirect) can provide effective internal lighting. Particular attention is given to day lighting while designing a building when the aim is to maximize visual comfort or to reduce energy use. Energy savings can be achieved from the reduced use of artificial (electric) lighting or from passive solar heating. Artificial lighting energy use can be reduced by simply installing fewer electric lights where daylight is present or by automatically dimming/switching off electric lights in response to the presence of daylight – a process known as daylight harvesting.
The proper circulation of the natural air and light maintains the proper healthy environment of the room's environment and it also prevents different disease and bacterias.
The air and light comes in the room through an opening on the upper side of a wall ,which is known as the ventilators,this ventilators are very important for a healthy indoor environment.