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Old 07-25-2010, 09:38 AM   #2 (permalink)
Arragonis
The PRC.
 
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The hot water from the engine is there all the time anyway, so no additional energy in making that.

Some cars with climate control with air con do that automatically - turn the AC on and off. You can cycle your air con manually to do the same thing. I've seem some advice about not running it when accelerating in a low power car.
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