I can see this topic opened up a can of worms.... I understand theres no 100% effective way to get the heat upstairs, but I do feel the putting vents high on the walls into the cold air return should be effective this would be right at the stoves location also in my gameroom , but is this a fire issue like the grates would be ? Dont get me wrong I love the heat in the gameroom but would like to share it a bit with the rest of the house... Thanks Pez