Design and Development Testing of an Improved High-Efficiency Water Heater

摘要

A high-efficiency water heater is described which uses a design approach quite different from the conventional center-flue water heater. While high efficiency might have been more readily achieved through the use of a powered combustion system, a cost/benefit analysis showed that a natural-draft system would be more cost effective for residential water heating. The subsequent improvements in a prototype and the current performance are described. (ERA citation 08:015201)