Energy & environment · 02/06/2023Updated: 10/16/2026 · 1 min read
U.S. Department of Energy Amends Federal Test Procedures for Commercial Warm Air Furnaces
Summary
The U.S. Department of Energy (DOE) is amending the Federal test procedures for commercial warm air furnaces to incorporate the latest industry test standards and establish a new metric, Thermal Efficiency Two (TE2).