I have two cold air returns on the main floor of my house. I'm remodeling one room where one of the returns are. Can I cover it up with the new floor or do i need two returns ? It is on the bottom of the wall towards the floor. What I want to do is make where the return is a doorway into the other room. Am I going to have to relocate my door idea or move the return? I really need to know if you have to have two returns.