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
A car’s heater is a radiator, it pumps very hot engine coolant through a small radiator with of pipes and hundreds of tiny fins, which makes the fins quickly get very hot. It then passes the cold air through the fins. The fins have a very high surface area, so they can heat air quickly as it passes over them.
[Here’s](https://images-na.ssl-images-amazon.com/images/I/614sG-DtfDL._AC_SL1001_.jpg) a picture of the inside. The tubes at the bottom are for coolant flow in and out.
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