What makes HVLS fans so effective at moving air? When it comes to ceiling fans, we often assume that higher rotational speed is the key to achieving greater CFM. But speed is not the only answer….

You’ve probably noticed them—perhaps while working out at the gym or dining al fresco at a restaurant. It's blazing hot, and yet you feel surprisingly comfortable. You look up to see an enormous fan, quietly rotating at a leisurely speed. And you think….