Steam boilers operate at a higher temperature than hot water boilers, and are inherently less efficient, but high-efficiency versions of all types of furnaces and boilers are currently available. To learn more about furnaces, boilers and other types of home heating systems, explore our Energy Saver 101 infographic on home heating.
Good condensing boilers can attain energy efficiency of 90% or more. Boiler Efficiency Ratings. A boiler's efficiency is measured by annual fuel utilization efficiency (AFUE). This is the ratio of the boiler's annual heat output compared to the total annual fossil fuel energy it consumes.
Condensing Boilers Can Ensure a 90% Efficiency Rate. Not only is the condensing boiler a good option if you are concerned about your carbon footprint but condensing boiler manufacturers also claim that the efficiency rate of their products can reach up to 98%.
I first encountered condensing boiler woes when conducting an energy audit for a winery which had retrofitted its conventional boilers to condensing boilers. Operating with a supply water temperature of 180°F and a return water temperature of 140°F, the boilers never operated in condensing mode and the actual boiler efficiency was around 85% ...
For a boiler to qualify for ENERGY STAR®, the product must meet or exceed the EPA's minimum efficiency ratings. In U.S. Boiler Company's line of condensing products, the Alpine, Aspen, K2 and K2 Combi boilers are ENERGY STAR rated. Furthermore, condensing boilers are not just good for your wallet. They are also good for the environment.
assessed four condensing boilers at the Peachtree Summit Federal Building heating plant; the National Renewable Energy Laboratory (NREL) assessed twenty-two condensing boilers distributed throughout five Denver Federal Center (DFC) facilities. Peachtree's condensing boiler plant was monitored for approximately six months, from December to May.
Energy Kinetics Accel CS condensing boilers have wide-open water passes to optimize condensing, resulting in the best boiler efficiency and performance. Because old cast iron boiler designs are not stable enough to burn fuel without significant excess air, these system require draft hoods.