A. O. Smith's Signature 500 Series 40-Gallon Power Vented Water Heater is designed to provide efficient and reliable hot water for households with 3 to 4 people when sized appropriately. Featuring an environmentally friendly 50,000 BTU low NOx gas burner, this model delivers 87 gallons of hot water in the first hour utilizing an electronic gas valve for precise temperature control that requires no external power source. An LED status indicator on the valve enables easy diagnostics reporting and push-button ignition to simplify startup. Count on this 40-gallon natural gas water heater for safe operation thanks to a built-in system that reduces risks of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also mitigate hazards during use. Built to last, this model includes features Tank Guard®, designed to provide ultimate tank protection and increase the water heater's lifespan. For added peace of mind, this unit includes a 6-year limited warranty. Want to save money on your energy bills? This unit operates at a 0.70 Uniform Energy Factor (UEF), which can reduce your energy consumption compared to less efficient models.

• Delivers the ideal amount of hot water for households with 3 to 4 people when sized appropriately

• Features an environmentally friendly 50,000 BTU low NOx gas burner that delivers 87 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 the system's operational status

• Built-in safety system reduces the risk of accidental flammable vapor ignitions

• Tall, slim 68.5-in H x 20-in diameter profile enables easier installation in narrow spaces

• Flexible power vent installation through the wall or roof up to 180 feet

  
  

• Provides peace of mind with 6-year limited tank and parts and 1-year limited labor warranty