HVAC stands for Heating, Ventilation, and Air Conditioning, and is a system that is used to control the temperature, humidity, and air quality of a space. It is used in both residential and commercial buildings to provide a comfortable environment for occupants. HVAC systems are made up of a variety of components, including an air handler, a furnace, an evaporator coil, a condenser coil, and a thermostat. The air handler is responsible for circulating air throughout the space, while the furnace is responsible for heating the air. The evaporator coil is responsible for cooling the air, and the condenser coil is responsible for removing moisture from the air. Finally, the thermostat is responsible for controlling the temperature of the space. HVAC systems are designed to provide a comfortable environment for occupants, while also being energy efficient. Proper maintenance of an HVAC system is essential for it to function properly and efficiently. Regularly scheduled maintenance should include checking the air filters, inspecting the ductwork, and ensuring that all components are functioning properly. Additionally, it is important to keep the system clean and free of debris to ensure optimal performance.