An ENERGY STAR certification is earned when certain products meet strict energy efficiency guidelines set by the Natural Resources Canada. By choosing ENERGY STAR certified heating and cooling equipment, 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 with an Annual Fuel Utilization Efficiency (A.F.U.E.) rating starting at 87% are considered to be energy efficient. If your equipment does not have an ENERGY STAR label on it, it may be using more energy than is necessary, ultimately costing you more money.