A.O. Smith Signature 500 Tall 50-Gallon Natural Gas Power Vent Water Heater (Model #G6-UPT5042NV). Measures 23.75"W x 22"D x 73"H with a 3/4" water connection size. Features a 42,000-BTU ULNX (ultra-low NOx) power vent burner for fast recovery and energy-efficient performance. Unboxed in-store; 3 dents noted on the back panel — functionality not affected. Suitable for residential applications requiring high hot water demand. Power vent design allows flexible venting options. Please verify local gas codes and venting requirements prior to purchase.