Is HVAC the same as heating system?

No, HVAC is not the same as a heating system. HVAC stands for Heating, Ventilation, and Air Conditioning, and is a system that provides heating, cooling, ventilation, and air quality control for a building. A heating system, on the other hand, is a system that is designed to provide heat to a building. While a heating system is a part of an HVAC system, it is not the same as an HVAC system.