 now if it's in the wall use some of that fire caulking the 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 condition 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 and