Introducing the A.O. Smith Signature 100 50-Gallon Tall 40000-BTU Natural Gas Water Heater: The Ultimate Solution for Large Households Never run out of hot water again: With a massive 50-gallon capacity and a powerful 40,000 BTU burner, this water heater can easily handle the hot water demands of even the largest households. It delivers a whopping 84 gallons of hot water in the first hour, so you can shower, run the dishwasher, and do laundry all at the same time without worry. Eco-friendly performance: This water heater is designed with the environment in mind. It features a low NOx gas burner that produces fewer emissions, and its high-efficiency design helps you save money on your energy bills. Reliable and long-lasting: A.O. Smith is known for its quality water heaters, and the Signature 100 is no exception. Easy to install: This water heater has a tall and slim profile that makes it easy to install in tight spaces. It also comes with a variety of features that make installation quick and hassle-free, such as a push-button ignition and an LED status indicator. Here are some additional benefits of the A.O. Smith Signature 100 50-Gallon Tall 40000-BTU Natural Gas Water Heater: Electronic gas valve for precise temperature control Built-in safety system to reduce the risk of accidental flammable vapor ignitions Protective anode rod and fused ceramic tank shield for superior tank protection High-altitude certified from 0 ft to 10,100 ft Overall, the A.O. Smith Signature 100 50-Gallon Tall 40000-BTU Natural Gas Water Heater is the perfect choice for large households that need a reliable, efficient, and eco-friendly hot water solution "Environmentally friendly 40 000 BTU Low NOx gas burner delivers 81 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 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