 Now, if it's in the wall, use some of that fire caulking, that fire foam to go through and close up all those things. Not a bad idea anyway. But you need to stop any drafts from the conditioned space to go out there. Because what happens is you'll put on, you need to have more ventilation for incoming air, which is usually around your soffits. But if you don't have that balanced out, it's going to pull more. And then all of a sudden, it's going to pull cool air out of your house.