Yes, HVAC and refrigeration are two distinct systems. 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 typically consists of a furnace, air conditioner, and ventilation system. Refrigeration, on the other hand, is a system used to cool and preserve food and other perishable items. It typically consists of a compressor, condenser, evaporator, and expansion valve. While both systems are used to control the temperature of a space, they are distinct in their purpose and components.