In the world of energy modeling and simulation, HVAC refers to: Heating, ventilation, and air conditioning. These systems are responsible for controlling the temperature, humidity, and air quality in a building.

This is often the trickiest part of the model for many people because it requires a full understanding of the vast possibilities in HVAC.

On another note, sometimes HVAC refers to High Voltage Alternating current. If you are searching for that type of HVAC, this website is probably not for you, but you're welcome to browse