Radiator Covers

Does anyone know if radiator covers are a pro or a con in terms of efficiency? I have seen conflicting reports. Some energy advice sites say remove them during the heating season, because they interfere with air flow. But of course the companies that manufacture them say they increase efficiency, by forcing the radiator to draw cold air from the floor, not the top, and becasue they direct more of the warm air to the middle of the room, not the ceiling.

By Brownstoner |