An air conditioner is a home appliance or a system designed to reduce the moisture and remove heat from an area. Apart from dehumidifying, it also provides ventilation.
Ventilation is generally associated with the movement of air. Ventilation is necessary to remove the carbon dioxide and to bring in the oxygen to make sure that people are inhaling fresh air. Stagnant air spreads the sickness and allergies usually airborne. Insufficient ventilation promotes the growth of bacteria and fungi. Improper ventilation also stops the supply of oxygen to the human brain and the person cannot perform actively.
Central air conditioning system distributes cooled or dehumidified air to more than one room. In a central air conditioning system, room air is drawn in from various parts of the building through return-air ducts. This air is pulled through a filter to remove airborne particles such as dust and lint. Some filters remove microscopic pollutants as well. A central air conditioning has a centralize duct system. The duct system or air distribution system has an air handler, air supply system, air return duct and the grilles and register that circulate the fresh air.
