Heating, Ventilation, Air conditioning
Warming, airing and air conditioning are divisions of the HVAC. Radiators, furnaces, fire place stoves as well as electric heating are often associated to heating. Radiators are provide with hot water from boilers, fire place and stoves supplies heat through burning wood or coal, furnaces produce heat in a space through burning of fossil fuel, and electric heaters use the principle of electrical resistance to generate heat. In very cold areas, heating is often used.
The topic of ventilation is often relative to the circulation and movement of the air between an open space and an enclosed space. This activity is achievable by means of natural occurrence or forced ventilation. To aid ventilations there are equipments that may be used, like chimneys, blowers, educators, and ventilators. The objective of ventilation is to give the occupants of a safe and comfortable space. It is highly important in times of fire incidents.
Lastly, ?AC? stands for air conditioning. It is not just about refrigerant filled with air conditioners like what the popular belief says. As the word ?conditioning? suggested, air conditioners should condition the air in a room to reach comfort levels of the occupants. To reach the comfort level, the equipment should do any of the following or there combination. In the form of heating or cooling, change the air temperature, Change air humidity, Sift and purify the air.
Air conditiong, heating and ventilation can be coupled like in the case of central air conditioners. There are equipments that can alter air temperature by cooling and is known asair conditioner. If heat is used, it is called heat pump. Heat pump is only suitable for heating if temperatures don?t go down to extremes. Thus a supplementary heating equipment will be used like a heating strip, furnace, or radiator.
An equipment with compressor, condenser, expansion valve, evaporator and tubes filled with refrigerant is a mechanical cycle air conditioner. The usual mechanical air conditioners can alter humidity. Ducts and blowers will be required for whole building air circulation. Such combination is usually used with central air conditioners. The designated areas shall get the conditioned air. Most conditioning equipment, comes with a package of fitted filter or a separate installation. Its main reason is to filter out dust in air. Air purification is made possible by the following means: activated carbon (for odor removal), UV light (for removing germs), and HEPA filters (high efficiency particulate air). Just by the reason of air circulation and purification, AC is essential in our life, much more to areas with extreme temperatures.
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Source: http://www.laptopcomputersnew.com/home-improvement/what-is-hvac.html
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