Ventilation is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used to control indoor temperature, humidity, and air motion to benefit thermal comfort, satisfaction with other aspects of indoor environment, or other objectives.

• Optimization of energy costs.
• Reduction of occupational health disease claims.
• control of contanimants to acceptable levels.
• controls of heat and humidity for cpmfort.
• Prevention of fires and explosions.