"The Energy Department on Wednesday proposed reversing a Trump-era rule that was expected to undermine its ability to regulate efficiency of both residential furnaces and commercial water heaters.

The Trump administration’s rule  — completed five days before President Biden's inauguration — was expected to keep inefficient heaters on the market for more time by dividing up the heaters into two categories based on how they’re vented.

By creating a new class of products for furnaces that had a type of venting known as noncondensing venting, these furnaces would need to be regulated separately and could not be entirely phased out."

Rachel Frazin reports for The Hill August 18, 2021. [2]