A method for dividing a single boiler heat exchanger into high and low temperature outputs has a dividing wall making burner and hot gas heated sections.

摘要

The boiler has a gas/air burner (2) and surrounding heat exchanger (7) and a wall (10) separating one part (72) from the gas fired section (71) so that only the exhaust gas fumes heat the first section (72) as they exhaust through a vent (21).