A boiler's energy efficiency performance over a heating season is called the Seasonal Energy Utilization Efficiency (SEUE). This SEUE is expressed as a percentage. For boilers with no standing pilot light, the SEUE is equivalent to the Annual Fuel Utilization Efficiency (AFUE). The higher the percentage, the more efficient the boiler.
ENERGY STAR qualified boilers have an AFUE of 85 percent or more.
Many factors affect your home-heating needs, so have a heating-load calculation performed to properly size your boiler (heating capacity). Legend |