My Electric Furnace Man coal stoker has been running well for years and years, acually for decades. A visitor commented that I should have a barometric control on it. It sits in the basement, four feet from a stone foundation and the flu into a two story lined brick chimney. When adjusted right for coal feed and air it burns very well. I heat a two story house with about three tons of coal supplemented by a wood burner on a separate chimney. Do I really need to add a barometric control for my EFM stoker?