50 GALLON TALL 6-YEAR 40,000 BTU NATURAL GAS WATER HEATER Ideal hot water delivery for households with 5+ people when sized appropriately Environmentally friendly 40,000 BTU Low NOx gas burner delivers 81 gallons in the first hour Electronic gas valve provides precise temperature control for optimum hot water delivery Self-diagnostic electronic gas control incorporates an LED status indicator that monitors and reports on system operational status Built-in safety system reduces the risk of accidental flammable vapor ignitions Tall and slim 60.75-in H x 21-in diameter profile is designed for easier installation Protective anode rod and fused ceramic tank shield provide superior tank protection and extend water heater life High-altitude certified from 0 ft to 10,100 ft 6-year limited residential warranty gives you peace of mind