I fitted a door closer onto an internal fire door in my house and was initially delighted as everything seemed fine. The door in question is the door that leads from the kitchen to the lounge and when I first tested it after fitting, the back door to the house leading from the kitchen into the garden was open. However when I walked through the door later when the back door was closed the closer didn't close the door. I am told that this is down to the fact that I don't have a vent in my kitchen and air displacement? Apparently the back door being open created a vacuum which meant the door closed which obviously wasn't there when the back door was closed. Firstly does anyone know if this is correct? If so is there any way around this as I plan on fitting door closers onto every door in the house and am not exactly over enamoured about the thought of having to put an air vent in every room! The type of door closers I am fitting are the jamb mounted type which fit into the door frame and work on a spring mounted chain. Any help would be hugely appreciated! Cheers.