Quote:
Originally Posted by HypermilingNoob
Now how about the heater? It uses electricity obvious but is it a large amount?
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No, the heat is coming from waste engine heat, that would otherwise go to the radiator. That's why, if you have a radiator block and your coolant temp starts getting too high, you can bring it down by turning on the heater.
The only extra energy it uses is the little bit of electricity needed to run the fan.