Boiler, we’re so convinced of the performance of our Alpine™ and K2™ condensing gas boilers that we offer a free standard extended warranty plan that provides parts and labor for the boilers and their controls for 3 years. The Alpine™ has a 95% AFUE rating and K2™ has a 94% AFUE rating. Boiler’s most efficient hydronic systems are our high-efficiency Alpine™ gas-fired condensing boiler and the new K2™ condensing gas boiler, which are both ENERGY STAR®-certified. The higher the rating, the greater your savings will be. An AFUE of 90% means that 90% of the fuel energy becomes heat for your home and the other 10% escapes up the chimney and elsewhere. AFUE is how heating equipment efficiency is measured. They have annual fuel utilization efficiency (AFUE) ratings of 85% or greater, exceeding the federal minimum standard for energy efficiency set by the U.S.
You will find product data sheets, brochures, and user and installation manuals. We provide extensive information for consumers and contractors about our large line of hydronic heating products, including water boilers, steam boilers, hot water heaters, and radiators. Boiler Company, are another excellent resource for information.
Manufacturer websites, such as ours at U.S. Another good source for accurate information about heating systems is your local plumbing and heating contractor. So can checking AFUE efficiency ratings and ENERGY STAR® certification on the residential boiler you have in mind. Reading consumer and contractor reviews can help narrow down your decision.