Still running my Keystocker KA-6 for hot water. 2 adults- 1 infant....... with day care provided daily by an Aunt in our home. Running about 20 Lbs coal daily- sometimes less- sometimes more. Chimney draft is still working. Absolutely do not run out of hot water.
. Boiler is in the basement and it's dry. Basement temp usually 72 degrees unless boiler is pushing alot. FULL tank of fuel oil down there and 2 year old Buderuos cold start boiler system that I AINT running. Might be crazy- might be dumb. I like it!