U.S. Sen. Michael Bennett (D-Calif.) has submitted a letter to the Department of the Treasury urging the modification of part of an Internal Revenue Service (IRS) rule. The rule does not allow owners of different components of a geothermal heat pump (GHP) system to claim a tax credit for the operation of those components.

Furthermore, Bennett has enlisted 13 senators (all Democrats) to add their names to the letter, which is dated Oct. 3, 2024. They are, Richard Blumenthal (Conn.); Sherrod Brown (Ohio); Tammy Duckworth (Ill.); Richard Durbin (Ill.); Kirsten Gillibrand (N.Y.); Amy Klobuchar (Minn.); Edward Markey (Mass.); Bernie Sanders (Vt.); Brian Schatz (Hawaii); Tina Smith (Minn.); Chris Van Hollen (Md.); Elizabeth Warren (Mass.); and Peter Welch (Vt.).