Photo by Kyle Walton.Imagine: as your feet pound the pavement on an unbearably hot afternoon, you suddenly get a blast of fresh air. Whether it’s from a garage, a store looking to attract new customers or that one metal grate over the Dupont Circle Metro station that always blasts out cold air (my personal favorite), there’s nothing quite as thrilling as that first frigid taste of recirculated air on your skin, right? Our sister site…