The actual electrical connections are depicted in a circuit diagram. A wiring diagram is a drawing that depicts the physical arrangement of cables and the components they link. It is also known as artwork or layout, physical design, or wiring diagram. A comfortable environment can increase productivity several times.Therefore, it is important to continuously monitor environmental variables such as temperature, relative humidity, dew point, light intensity and air quality (gas/smoke) and adjust the corresponding system to maintain a comfortable working environment.