AC power consumption question

I have a Civic hybrid and am curious if anyone knows how the AC draws power from the engine. Is it an electrically or mechanically driven compressor? In either case, does the temperature or fan setting affect the power draw from either the engine or battery?

I'm trying to optimize how I use the AC and generally when I need to use the AC, I just set it to the lowest temperature and cycle the AC on and off by pushing the button. I was assuming that increasing the temperature setting doesn't necessarily decrease the AC power consumption, but this could be a wrong assumption. Any info would be greatly appreciated.

I did a search in the forum and didn't come across anything relevant.

thanks,

aspenboy