05/29/2026
October 6th is coming up quickly! New DOE efficiency standards for commercial water heaters are going into effect and the changes are significant:
🔥 Gas-Fired Storage Water Heaters Minimum Thermal Efficiency increases from 80% → 95%
⚡ Gas-Fired Instantaneous Water Heaters Minimum Thermal Efficiency increases from 80% → 96%
🏠 Residential-Duty Commercial Gas Storage Must meet a new Uniform Energy Factor (UEF) of 0.9297
📉 Standby Loss More stringent maximum standby loss requirements apply to all storage models
Learn more about how Noritz has your next commercial installation covered to meet these new standards at Noritz.com/DOE