In industrial environments, the dirty air caused by some processes must be freshened constantly or temporarily. Necessary systems aims to hold the humidity and temperature of the air of the environment at a constant value, independent from outside air conditions. The basic elements of ventilation systems are as follows;
b.Speed of the air
c.Cleaning of the air.
People leaves bad smell, water vapor, carbone dioxide, and heat to environment. When many people are together in the same place, enough amount of fresh air must be send to this environment in order to prevent that the air will be full of gas and smoke. In industrial environments, ventilation is necassary to be able to work comfortably and to make the production qualified. The proper work of ventilation systems depends on some basic conditions which are :
1-The fresh air must be given to the environment.
2-There should not be air flow which causes discomfort.
3-The ventilation system must collect and distribute the air uniformly.
4-There must be quite work in facilities with ventilators.