Do you need to use AC in car air conditioning in winter?

[MacMackenzie]

Car air conditioning does not require the use of AC in winter. The warm air in winter comes from the heat generated by the engine during operation. When the engine's cooling system dissipates heat from the engine, the dissipated heat is blown into the car through a fan, forming warm air. When the warm air is not in use, the fan stops, and the warm air outlet closes, causing the dissipated heat to completely disperse into the atmosphere. When the AC button inside the car is turned on, the entire car air conditioning's evaporator is activated accordingly. When the evaporator is in operation, its temperature is relatively low. As air passes through the evaporator, the water vapor inside is rapidly cooled into water droplets. If the air passes through the evaporator and then is heated by the warm air exchanger, the hot air blown into the car will be drier, making it less likely for the car windows to fog up.