eli5: How do space heaters start pumping out warm air right away but car heaters take some time to warm up?
In: Technology
The source of heat is different. In a space heater, the heat comes from electrical resistance — current flowing through a wire has resistance, which creates heat immediately. In a car, air is heated by waste heat coming off the engine, so the air won’t be hot until the engine heats up, which takes time.
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