did you know that most window units create more heat than they cool? I took a Heat transfer class in college and one of the "show n tell" items was a window unit in an "ice chest" ( basically a insulated box 2.5' cube with 3" closed cell insulation) ... the temp was taken at the beginning of the class ( 76F), the lid applied and the unit turned on... ( the unit is completely inside the box) at the end of class the temp in the box had risen about 28 F higher ( to 104F) than at the start of class... and, the unit inside was a very efficient one to boot...
so.... we are adding to the global warming by trying to cool off
so.... we are adding to the global warming by trying to cool off