What are the criteria for choosing between recirculation and fresh air mode in car air conditioning?
1 Answers
Car air conditioning recirculation and fresh air mode selection criteria are: when turning on the air conditioning for cooling or heating, first activate recirculation mode to quickly lower or raise the interior temperature. Once the temperature stabilizes, appropriately switch to fresh air mode to exchange air with the outside. The difference between recirculation and fresh air mode lies in the air intake source - recirculation draws air from inside the vehicle. The choice between recirculation and fresh air mode can be determined based on the following three situations: 1. If the car has been exposed to intense sunlight and the interior feels like a sauna, first activate fresh air mode for ventilation and heat dissipation after entering the vehicle, while also opening windows and sunroof to accelerate cooling. After 3-5 minutes when the interior temperature stabilizes, close all windows, turn on cooling, and switch to recirculation mode. 2. In extremely cold winters, delay turning on the heater until the engine reaches normal operating temperature. Then activating heater with recirculation mode can rapidly increase interior warmth. 3. During traffic congestion, it's best to use recirculation mode to prevent circulation of polluted outside air into the cabin.