The U.S. Department of Energy has issued notice of a proposed rulemaking for residential furnaces, reports Jen Anesi of ACHR News. “The proposed rule would raise the national minimum energy-efficiency standard for residential nonweatherized gas furnaces from the current 78 percent AFUE — which is set to increase to 80 percent in November — to 92 percent while also setting new efficiency standards for electrical consumption in standby mode,” she reports. The standard, which would go into effect in 2021, would effectively eliminate non-condensing furnaces from the market, which could send ripples through the industry if approved. Retrofitting from a non-condensing furnace to a new condensing model would be a more expensive and complicated replacement, though it would also provide the biggest impact on energy bills.

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