How do high-efficiency condensing boilers work?
A. Condensing boilers achieve very high efficiencies by capturing and using heat from the combustion process that would otherwise be wasted. The boilers heat exchanger uses the exhaust gases from the combustion process to preheat water as it enters the boiler. In addition, the water vapor produced in the combustion process condenses back into water and also releases heat that is then re-used. Together, these two processes create the high efficiencies associated with condensing boilers. Just as important as the efficiency of the condensing boiler is the efficiency and proper installation of the overall heating system to which the boiler is a component. To achieve maximum efficiency, a total heating system approach is required.
