Why is the BMW's air conditioning hot on the driver's side and cool on the passenger's side?

[LaAliyah]

The reason why the BMW's air conditioning is hot on the driver's side and cool on the passenger's side is due to the effect of dual-zone air conditioning. Principle of dual-zone air conditioning: The dual-zone air conditioning system has independent air ducts for the driver's side and passenger's side vents, allowing different temperatures of air to be blown from each side. In contrast, a standard air conditioning system shares a single air duct for both left and right vents, meaning the air coming out is the same temperature on both sides and cannot produce different temperatures. In simple terms, dual-zone air conditioning allows the driver and passenger to freely choose their respective vent temperatures. Difference between single-zone and dual-zone air conditioning: Single-zone air conditioning maintains the same temperature on both left and right vents and adjusts synchronously, while dual-zone air conditioning allows different temperatures to be set for the left and right vents.