Just to add to the above, the HP draw also depends on RPM. At low RPM, the draw is in the 3-5 HP range. If it was an electrically driven unit, the HP would stay low. Being tied to the engine RPM, it is pretty much overspeeding above 2500 RPM on the engine. The overspeeding wastes a LOT of HP.
Future vehicles are planning on all eletric air conditioning for this reason. Better economy. Same with power steering. A lot of new vehicles now use electric driven PS to minimize HP waste.
My name is Richard. I was a Contouraholic.
NOW: '02 Mazda B3000 Dual Sport, Black
BEFORE: '99 Contour SE Sport
Duratec ATX Spruce Green
PIAA 510's, Foglight MOD, K&N Drop-in
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