What temperature should the Buick Envision's air conditioning be set to for heating?

[SanArcher]

For the Buick Envision, setting the heating to 27 degrees Celsius is sufficient. Heating System Principle: The car's air conditioning heating has no relation to the compressor. The heat source for heating is not obtained by the air conditioning itself but is provided by the car's radiator. In the morning, before the car warms up, the air conditioning blows cold air. Once the car is warmed up, the air conditioning continuously delivers warm air. The heating process itself consumes almost no energy, as it utilizes the car's waste heat. Ventilation Principle: Ventilation is divided into internal circulation and external circulation. When using internal circulation, the air inside the car barely exchanges with the outside. When using external circulation, the fresh air intake located under the hood continuously brings in outside air to maintain the freshness of the air inside the car.