How much fuel is consumed when idling a car with the AC on for an hour?

[Nunes]

Idling a car with the AC on for one hour consumes approximately 2 liters of fuel. Precautions for using car air conditioning include: 1. Turn off the A/C during startup and rapid acceleration: Since the operation of the air conditioning (non-independent air conditioning) consumes part of the engine's power, it is best to turn off the A/C when starting the vehicle or during rapid acceleration, and turn it back on after the vehicle has started moving. This avoids insufficient engine power during acceleration and startup while also saving fuel. 2. Control the direction of the air vents: Based on the principle that cold air sinks and hot air rises, when controlling the air vents, you can follow the rule of pointing the vents upward when cooling and downward when heating. 3. Avoid turning on the AC immediately after the car has been exposed to the sun: After prolonged exposure to the sun, the temperature inside the car is usually very high. In such cases, do not turn on the air conditioning immediately. It is best to open the windows first to ventilate and allow the hot air to escape before turning on the AC.