The Professional Classic Series Power Direct Vent water heaters provide efficient water heating solutions with a .63 - .69 UEF, ensuring cost-effective operation. Featuring an induced draft system that meets FVIR compliance standards, these units are available in 40 and 50 gallon capacities. They boast integrated self-diagnostic controls, thermostat, and gas valve for enhanced reliability and ease of use, making them suitable for residential applications where reliable performance and energy efficiency are essential.