Reaching out to my respected DISsers! My office connects to a smaller, not-well-ventilated office. The AC is controlled via thermostat in my office. As luck would have it, I am naturally always cold and my colleague is naturally always sweating hot. I can't stand to have the AC constantly blowing (with me in sweaters) all summer, but otherwise her office gets stuffy and just doesn't cool down. She has a few small, relatively-ineffective fans in her office to help. I really want to reduce the AC in my office, and so would like to buy for her use a powerful fan that might make a real difference in her office. Any recommended models? TIA!