This job involved removing the coal boiler, the conventional water heater, and the ceiling storage tank from the original indirect water heater on the coal boiler. We put in a Munchkin boiler and its domestic hot water storage tank. This house sits right on lake erie and is about 90-100 years old we think. The owner gave us the dollar figures she saved and it came out to 42% and thats with heating the garage now also. We added a hydro air unit heater in the garage. So were actually heating more area than before.