 You know, where you're actually deflecting the cooled air out of the register. Now, if you got a register and it's just shooting right up into the room, who cares, right? It's fine. But maybe you 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. Yeah, it's going to take a while.