Crown Boiler Mega-Stor Vertical Indirect Water Heater. Model # MS-119. The Mega-Stor is a stainless-steel indirect water heater which provides abundant domestic hot water utilizing energy provided by your boiler. With a stainless steel, smooth surface coil that transfers heat throughout the tank, the Mega-Stor is capable of recovery rates well in excess of a typical gas, electric or oil water heater. The two inch thick layer of polystyrene foam insulation keeps the water in your Mega-Stor hot for hours during stand-by periods. The Mega-Stor is also equipped with a removable cover for ease of inspection. First Hour Rating: 472 GPH. Continuous Draw Rating: 384 GPH. Min. Boiler Output (Btu/Hr): 225,000. Boiler Water Flow Rate: 12.7 GPM. Head Loss: 7.9 FT W.C. Coil Surface: 24.3 Sq. Ft. Volume: 112 Gallons. NOTE: Ratings based on the following conditions: 180 F Boiler Supply, 58 F Cold Water, 135 F Domestic Water Out. (ACN32)