 Yeah, and it drops in, right, literally, into a hole, and then you obviously have to install it properly so it doesn't leak, and then that's what a roofer does. And then it just, as Ron Popeil once said, you set it and forget it. Absolutely, and this thing's super efficient. It moves about 1,500 cubic feet of air per minute. So most homes just need one, right? Yeah. It depends how bad your attic is. If it has proper ventilation...