text:  So they would say, no, don't do that. Don't think that you can just go back to an unused bedroom, close the vent and shut the door and think that you're going to be saving anything on heating and cooling and comfort. You won't. It's been proven over and over and over again that it does not work. It's better to leave those doors open, leave the vents open. Because the other side of it is all of your venting,