What is the definition of a systems HVAC? HVAC stands for Heating, Ventilation, and Air Conditioning, and it is a system used to regulate the air quality, temperature, and humidity within a space. The system is made up of several components, including a thermostat, a furnace, an air filter, a humidifier, and an air conditioner. The thermostat is used to set the desired temperature, and the furnace heats the air. The air filter purifies the air, removing dust, pollen, and other airborne particles. The humidifier adds moisture to the air, while the air conditioner cools the air. All of these components work together to create a comfortable environment in any space. HVAC systems are found in homes, offices, and other buildings, and they are responsible for maintaining the air quality and temperature of the space. Proper maintenance is necessary to keep the system running efficiently, and it is important to have the