Yes, aircon is an HVAC system. HVAC stands for Heating, Ventilation, and Air Conditioning, and aircon is a type of air conditioning system. Aircon systems are designed to cool and dehumidify the air in a building, and they are typically powered by electricity. Aircon systems are typically composed of an outdoor unit, an indoor unit, and a control system. The outdoor unit contains the compressor, condenser, and expansion valve, while the indoor unit contains the evaporator and fan. The control system is used to regulate the temperature and humidity levels in the building.