Gas-Fired Boilers and Furnaces | Department of Energy - Energy.govA residential natural gas meter. Gas boilers and furnaces can be fueled by either natural gas or propane with simple modifications accounting for the different Furnaces and Boilers | Department of Energy - Energy.govA central furnace or boiler&39;s efficiency is measured by annual fuel utilization efficiency (AFUE). The Federal Trade Commission requires new furnaces or boilers 

Oil-Fired Boilers and Furnaces | Department of Energy -| Photo courtesy State of Massachusetts. Oil-fired furnaces and boilers are a popular choice in areas of the country with limited access to natural gas, furnace and boiler - Appliance Standards Rulemakings and NoticesAs defined in the Code of Federal Regulations (CFR),furnace means a product hot water boilers and less than 225,000 Btu per hour for forced-air central furnaces, with the U.S. Department of Energy (DOE) energy conservation standards for The residential furnace energy conservation standard rulemaking docket Purchasing Energy-Efficient Commercial Boilers | Department of FEMP&39;s acquisition guidance and efficiency requirements apply to gas- or oil- fired, low-pressure hot water or steam boilers used in commercial space heating  Home Heating Systems | Department of Energy - Energy.govMost Americans heat their homes with a furnace or boiler, and high-efficiency models of all types of furnaces and boilers are available. Is it time Learn More.Purchasing Energy-Efficient Residential Gas Boilers | Department of The Federal Energy Management Program (FEMP) provides acquisition guidance for residential gas boilers, a product category covered by ENERGY STAR 

A High-Efficiency Natural GasFired Boiler for - Energy.govLead Performer: Oak Ridge National Laboratory Oak Ridge, TN Partners: -- Gas Technology Institute -- A.O. Smith Corp. Milwaukee, WI -- Rinnai Corp. DOE