a.o. Smith Signature Select 40-Gallon Tall 9-Year Limited 40000-BTU Natural GAS Water Heater | G9-T4040NVR

Environmentally friendly 40, 000 BTU Low NOx gas burner delivers 80 gallons in the first hour. 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 61.75-in H x 20-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.