It depends on the day. If we just need a little relief, we turn on the fan portion of our AC. If it's humid, we put it on low to get some of the moisture out. If it's just plain yucky out, then we crank it. We also use our shades, windows, and ceiling fans to circulate air. Our house gets direct sunlight all day, so we put the shades down at lunch and back up at dinner. I hate paying for AC, but we're pretty much all home all day (DH works nights), so we try to save where we can.