In the summer it feels like your ceiling fan is cooling your room. When in fact I doesn't cool the room at all. It creates a similar affect of wind chill out side but on a much smaller scale. Ceiling fans use large angled blades that push air up or pull it down creating a small current inside your room making sweat evaporate off you skin - which makes you feel cooler. The angled blades collide with air particles in the path of spinning blade causing them to have forward momentum-downward if on the ceiling. The faster you spin the same size blade the faster the current created - making air in your room move quicker and thus making liquid evaporate quicker.