Understanding High Efficiency

What does it mean to have a high efficiency boiler? Boiler efficiency is measured by the amount of fuel that’s converted to energy or as the Federal Trade Commission calls its, annual fuel utilization efficiency or AFUE. It’s a ratio of how much heat a boiler puts out versus how much fossil fuel is consumed. For a system like the Mascot LX with a 95% AFUE rating, 95% of the fuel consumed is converted to heat.

High-efficiency boilers tend to have

  • Condensing flue gases in a second heat exchanger for extra efficiency
  • Sealed combustion
  • 90% to 98% AFUE.

Laars Boilers Meet ENERGY STAR Certification

Earning ENERGY STAR means products meet strict energy efficiency guidelines set by the U.S. Environmental Protection Agency. By choosing ENERGY STAR certified heating and cooling equipment and taking steps to optimize its performance, you can enhance the comfort of your home while saving energy. Saving energy helps you save money on utility bills and protect the climate by reducing greenhouse gas emissions.

ENERGY STAR certified boilers have annual fuel utilization efficiency (AFUE) ratings of 87% or greater for oil boilers and 90% or greater for gas boilers. AFUE is the measure of heating equipment efficiency. The Laars Mascot FT Series, Mascot LX Series (with and without water heating) and Neotherm Series all meet this certification.