HVAC stands for Heating Ventilation and Air-Conditioning.
Heating -This is the process of adding Heat to the Condition space when Temperatures Outside the Room are Very Low less the 5 C.
Ventilation-This is the Process of supplying Fresh Air to the Condition space
and Removal of Air from the Condition space.
Air Conditioning-The process of controlling,various parameters
1) Temperature,
2) Humidity,
3) Cleaniness of Air,
4) Velocity of Air.
5) Odours
6) Pressure
