I am a huge fan of lower utility bills. I purchased a new AC about 3 years ago which was much more efficient than the previous one. I use it as little as possible. My 1959 ranch came with an attic fan which I love. Depending on the humidity I will open up the windows and turn on the attic fan on when its up to about 85 D rather than run the AC, it really creates a breeze. I find that unless it's real humid the AC doesn't really make me any more comfortable than moving the air around. I could live with no AC. I would however, be less productive on really hot humid days.