Monday, July 2, 2007

Air Ventilation System

The air ventilation is a process or intentional movement of air from outside the building to the inside the building. but if air Movement of air occur only inside the building and not the outside the building then this is called transfer of air as we seen the air generated by the Ceiling and table fans. But when people or animals are present in side the buildings then a proper air ventilation system is very necessary to dilute odors and limit the concentration of carbon dioxide and airborne pollutants. Air Ventilator is also delivers air by mechanical systems which may also generate heat, cool, humidify and dehumidify the space. Air movement into buildings can occur due to uncontrolled infiltration of outside air through the building fabric or the use of deliberate natural ventilation strategies. Advanced air exchange ventilators starts cleaning and recirculating a proportion of the air inside a building and you feel very good climate inside your home or building, In certain places, such as submarines, pressurized aircraft, and spacecraft, air ventilation system is also needed to provide natural oxygen, and to dilute carbon dioxide for survival. Buildings on Earth have significant air leakage, and rarely have been found to have dangerous levels of oxygen and carbon dioxide. Inadequate ventilation in a densely occupied room can cause the level of carbon dioxide to increase leading to sleepiness and reduced your efficiency at work. This is a matter of concern in schools where attentiveness and learning ability may be adversely affected because there is very less chances of the natural air ventilation. Natural ventilation is the process of supplying and removing air through an indoor space by natural means. There are two types of natural ventilation occurring in buildings, wind driven ventilation and stack ventilation.

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