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
Car heaters use heat produced by the engine. Engines run very fast, so generate heat pretty quickly. Some cars even rev higher upon starting to warm the engine and then lower the RPMs. Typically, the air is cold at first, and newer cars will shut vents from the inside until the heat warms up a bit.
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