New federal rule aims to phase out residential furnaces that waste natural gas
CNN
The furnace rule would be the country's first significant update to standards since the 1990s.
In the proposed rule, the details of which were shared first with CNN, non-weatherized gas furnaces and furnaces used in mobile homes would be required to be much more energy-efficient, achieving a 95% annual fuel utilization efficiency standard. Just over 40% of furnaces shipped today are at or above 95% fuel utilization.
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