What is the fuel consumption when idling with the AC on?

[London]

Idling with the AC on consumes approximately 1.4-2.5 liters of fuel depending on the engine displacement, with an average of around 1.6 liters. Here are the specific drawbacks of idling with the AC on: 1. High fuel consumption: Keeping the engine idling with the AC on while parked consumes a significant amount of fuel because the compressor relies on the engine's idle operation, leading to incomplete fuel combustion and easy carbon buildup. 2. Toxic emissions: Incompletely burned fuel produces toxic substances such as carbon monoxide. With the car windows and doors closed for extended periods, these exhaust gases can enter the sealed cabin and accumulate to levels that may cause carbon monoxide poisoning. Idling with the AC on emits more harmful exhaust gases compared to driving with the AC on, with relatively higher emissions of carbon monoxide, hydrocarbons, nitrogen oxides, and other harmful gases during idle conditions.