It also accounts for 26 percent and 15 percent of all U.S. emissions of sulfur dioxide and nitrogen oxides, respectively.
Furnaces are the most commonly used residential heating system in the United States.
Approximately 38 million gas furnaces are currently operating in U.S. homes and approximately 2.5 million of these furnaces are replaced annually. Products qualifying for this EPA program will be identified by the EPA Energy Star logo. Purchasing energy-efficient products becomes easier for consumers, as now they can simply ask for Energy Star models when working with a contractor to select a new furnace. Most of the major furnace manufacturers have decided to participate in the EPA program. Thus heating contractors will have easy access to Energy Star furnace models.