A HVAC gas package unit is a type of heating, ventilation, and air conditioning (HVAC) system that combines the functions of heating, cooling, and air circulation into one single unit. It is usually installed outside the home or building and consists of a gas furnace, an evaporator coil, and a condenser coil. The gas furnace heats the air, the evaporator coil cools the air, and the condenser coil helps to circulate the air. The unit is designed to provide a more efficient and cost-effective way to heat and cool a home or building. HVAC gas package units are becoming increasingly popular due to their energy efficiency and convenience. They are also much quieter than traditional HVAC systems, making them a great choice for homes and businesses.