The boiler on the side or back of the stove(ours was always on the left end) held in reserve Hot water, never quite boiling. Boiling was held in a "teakettle" the stove boiler(not broiler) held many buckets of water. I have forgotten the count, AND as we sat to eat before sitting I had the chore of refilling that tank. Stoves came with a right had tank as I remember "mary Annie" always sat in the corner behind the water tank, between the "wood box". She was quite old could not really see, very tiny(she shrank year by year) I cannot recall ever hearing her speak nor seeing her eat or drink. Those stove were something else ours had a ledge or bins over the flat part with four or six lids. The stove pipe went thru this area and heated it. Plates and bread to rise was placed inside. Also pie and anything needing warmth. As I remember it everything had a place; big coffee pot nest to boiler, opposite end tea kettle. Whatever was being prepared ,in the center, some direct to the fire, other on the lid. Lid lifters were on the boiler "handle"(not lid). Next to the boiler was the firebox and fire was also laid on top under the lids, much like charcoal. Firebox heated the water and the oven. This was another place of wonder, certain things went certain locations We had many uses for those stoves, my daughter has a classic in her storage garage. They "wax" it yearly. I think this is an oil not wax. Bud