 Also, deflectors, you know, where you're actually deflecting the cooled air out of the register. Now, if you've got a register and it's just shooting right up into the room, who cares, right? It's fine. But maybe you've got it where it's partially blocked by a couch or something. It's blowing it up the backside of the couch, right up against the window. The shades are open. It's going to take a while to enjoy that coolness.