When driving during a bitter cold winter, the air coming inside is constantly warm and comfy. How does the car warm up the air so much and so rapidly?
In: Engineering
The combustion engine loses around 33% of its energy production as heat loss. Meaning your engine is a natural heater for the car.
The heat is then transferred to the cars coolant lines to be sent to the radiator for natural cooling.
Your AC/Heater system takes some of this heat and sends it to your cabin. Since coolant lines are frequently close to hot coffee to boiling temps, it doesn’t take long for all this heat to start usefully warming up the rest of the car.
Note: It is faster to warmup the car by driving it than idling. Though, nobody would blame you for wanting a warm car in the warming before your commute.
Video Link for better understanding, [YouTube: How Stuff In My Car Works – How a Car Heater Works](https://youtu.be/x663vdSjFF0)
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