A. O. Smith's Signature 300 Series 50-Gallon Tall Energy Star Low NOx Atmospheric Vent Natural Gas Water Heater is designed to provide efficient and reliable hot water for households with 5+ people when sized appropriately. With an environmentally friendly 40,000 BTU Low NOx gas burner, this model delivers 75 gallons of hot water in the first hour. This high efficiency gas model has a uniquely designed damper door to stop the cool air from traveling through the flue when the water heater is in standby mode, maintaining the overall heat and efficiency of the tank. This ENERGY STAR® model does not require power, making it as easy as a standard atmospheric model to install. A. O. Smith’s 50-gallon model is designed with your safety in mind. With a built-in safety system, this model reduces the risk of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also ensures safe operation. This model is built to last. It features a protective anode rod and a ceramic fused tank shield designed to reduce corrosion and provide ultimate tank protection. It also features a self-cleaning dip tube designed to reduce sediment build-up and extend the overall life of the water heater. This added protection comes with a 12-year limited warranty to give you additional peace of mind. Want to save money on your energy bills? This model is ENERGY STAR® certified and operates at a 0.68 Uniform Energy Factor (UEF) which can reduce your energy consumption compared to less efficient models. Not sure if this is the right water heater for you? Use our product selector tool to see if this model is the right fit for your hot water needs.
Ideal hot water delivery for households with 5+ people when sized appropriately
ENERGY STAR® certified - Automatic flue damper increases efficiency as it automatically opens and closes to reduce heat loss in standby mode
Easy installation - uses standard 3-in or 4-in venting and requires no power
Only Energy Star qualified model on the market that does not require power
Tall and slim 61.25-in H x 22-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
12-Year limited tank and parts, 3-Year limited labor warranty gives you peace of mind