A.O. Smith Signature 300 40-Gallon Tall 12-year Limited 40000-BTU Natural Gas Water Heater

A. O. Smith's Signature 300 Series 40-gallon gas water heater provides reliable hot water for households with 3 to 4 people when sized appropriately. With an environmentally friendly 40,000 Btu/h Low-NOx gas burner, this flue damper model delivers 80 gallons of hot water in the first hour. This water heater does not require external power and is as simple as a standard atmospheric model. The automatic damper prevents cool air from traveling through the flue in standby mode to maintain overall heat and efficiency. The natural gas hot water heater is built with safety in mind. It has a safety system that reduces the risk of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also ensure safe operation. This model is built to last. It features Tank Guard® which is designed to provide ultimate tank protection and increase lifespan of the water heater. This added protection comes with a 12-year limited warranty for additional peace of mind. Delivers the ideal amount of hot water for households with 3 to 4 people when sized appropriately Fitted with an automatic flue damper that opens and closes automatically to increase efficiency and reduce heat loss in standby mode Simple installation that uses standard 3-in or 4-in vent ducting and requires no power Features an environmentally friendly 40,000 BTU low NOx gas burner that delivers 82 gallons in the first hour Tank Guard® provides advanced tank protection that extends the life of your gas water heater Tall, slim 62.5-in high x 20-in diameter profile enables easier installation in narrow spaces High-altitude certified from 0 ft to 10,100 ft Provides peace of mind with a 12-year limited tank and parts guarantee and a 3-year limited labor warranty Dimensions Diameter (Inches) 20.0 Rated Storage Capacity 38-Gallon Family Size 4.0 Vent Diameter(s) 3-in; 4-in Height (Inches) 62.5 Water Connection Size 3/4-in Insulation Thickness (Inches) 2.0 Weight (lbs.) 135.0 Nominal Capacity (Gallons) 40     Features BTU Rating 40000 Pilot Reset Button Yes Emission Rating Low NOx Point of Use No Foam Insulation Yes Temperature and Pressure Relief Valve Yes For Use with Mobile Homes No Uniform Energy Factor 0.68 Fuel Type Natural gas Use Location Indoor GPH Recovery at 90 Degrees F (Gallons) 40 Vent Type Type B double wall Grade Residential Venting Type Atmospheric High Altitude Model Yes Water Connection Location Top Ignition Type Piezo Water Heater Style Tall Pilot Light Window Yes