This year, Lennox has introduced the SL297NV Ultra Low Emissions Gas Furnace, the lowest emission furnace on the market, which produces 65 percent lower NOx emissions than standard low NOx furnaces, offering the ultimate in comfort and emissions compliance. With a heating efficiency rating of 97.5 percent AFUE (Annual Fuel Utilization Efficiency), the first-of-its-kind SL297NV can potentially save homeowners hundreds of dollars per year, compared to an older furnace. The variable-speed blower motor allows for constant and efficient adjustments of air flow speed and gently disperses even heat throughout their home. This furnace technology allows for a higher heat temperature that burns more of the NOx emissions before they are released into the air, allowing homeowners to breathe easy about the low impact heating their home is making on the environment while saving energy.