We use air conditioners for cooling and heaters for the purpose of warming up the houses and offices. Heating ventilations and air conditioning provides both the facilities of cooling and heating. HVAC is abbreviation of Heating, Ventilating and Air Conditioning. It also does ventilation for homes. The heating ventilation and air conditioning system is very important in the designs of both large and medium for industrial and office areas, like skyscrapers. HVAC is sometimes referred to as climate control. Refrigeration is sometimes added to the field’s contraction as HVACR. Heating ventilation and air conditioning systems provide ventilation, reduce infiltration and maintain pressure of a space. Heating ventilation and air conditioning system includes the basic principals of fluid mechanics, heat transfer and thermodynamics. The components of the HVAC system are invented with the industrial revolutions. Many companies of the world have introduced different procedures of modernization, control and high efficiency systems.

 

The three functions heating, ventilating and air conditioning of HVAC are consistent to each other. All of them provide thermal comfort and adequate indoor air quality. The heating ventilation and air conditioning systems also provide reasonable operations, installation and maintenance costs. In the modern buildings of the whole world, the designs, control systems and installation of these heating and cooling functions are incorporated into one or more than one HVAC systems. The HVAC system and tools are normally selected in size by the contractors for the use of small buildings. For the large business areas or large buildings, the expert designers and engineers evaluate different designs, and identify the heating ventilation and air conditioning systems.

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