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Title: Technology Solutions Case Study: Optimizing Hydronic System Performance in Residential Applications, Ithaca, New York

Condensing boiler technology has been around for many years and has proven to be a durable, reliable method of heating. Based on previous research efforts, however, it is apparent that these types of systems are not designed and installed to achieve maximum efficiency. For example, in order to protect their equipment in the field, manufacturers of low-mass condensing boilers typically recommend design strategies and components that ensure steady, high flow rates through the heat exchangers, such as primary-secondary piping, which ultimately result in decreased efficiency. There is also a significant lack of information for contractors on how to configure these systems to optimize overall efficiency. In response to these findings, researchers from Building America team Consortium for Advanced Residential Buildings worked with industry partners to develop hydronic system designs that would address these issues and result in higher overall system efficiencies and improved response times.
Publication Date:
OSTI Identifier:
Report Number(s):
Research Org:
Consortium for Advanced Residential Buildings (CARB)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B) (Building America)
Country of Publication:
United States
residential; residential buildings; Building America; CARB; condensing boilers; hydronic systems; gas-fired; baseboard; efficiency; modulating; indirect tank; hot water; buffer tank; variable speed pumps; thermostat setback; recovery; return temperature; standby losses; HVAC; optimization; cycling; AFUE