Stokerman,My efm stoker has a round access door. It is very old but still works well. I think this model was discontinued but I don't seem to have any trouble getting parts.Any idea what model number? Stoakerdude
It's the 520 model, the same as we make today. About 30 years ago, the boiler was redesigned to include the optional oil burner (so people could go away and forget about ashes) and a square door was added at that time.