Natural ventilation.
This can be achieved by providing suitable opening in the building of contaminated air ,to go out and at the same time permitting entry of fresh air in to the building from out side.This system is not completely reliable . Since it depends on the current of flow of natural wind.
Mechanical ventilation.
Mechanical ventilation with the provisions of mechanical exhaust fans is used in addition to natural ventilation for effective of work room.Mechanical ventilation is achieved by providing exhaust fans at suitable intervals in one side wall and sufficient inlet openings are made in the opposite wall.
This can be achieved by providing suitable opening in the building of contaminated air ,to go out and at the same time permitting entry of fresh air in to the building from out side.This system is not completely reliable . Since it depends on the current of flow of natural wind.
Mechanical ventilation.
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