Utica MGB-125-HD Hot Water Boiler Heating Standing Pilot Gas Fired 80% -125000BTU Utica's MGB boiler line is engineered for high efficiency. The special cast iron heat exchanger allows for efficient heat transfer while allowing flue gases to be vented through a chimney allowing a seasonal efficiency of 84.1%. The structure of the heat exchanger circulates the water ensuring quick and even heat transfer. Standing pilot and electric ignition are both capable options on the MGB boiler and stainless steel burners come standard with every single MGB. The boiler features a small footprint as well as easy installation and maintenance. 3842 MGB-125-HD Hot Water Boiler Heating Standing Pilot Gas Fired 80% -125000BTU Features: 84.[]