what model efm ?

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.

There's a tag welded on the front right above the door that tell the model # and info.