GU61-50T40R American Water Heater ProLine 50 Gallon Ultra-Low NOx Natural Gas Water HeaterProLine Gas Water Heaters offer a wide range of water heating solutions-from models that help you qualify for gas utility rebates to high recovery models ideal for large families with high demand for hot water. 6-year limited Tank warranty, 6-year parts warranty for Residential applications Intelligent Control Logic-The internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response to optimize performance. Green Choice Gas Burner -Patented eco-friendly burner design reduces NOx emissions by up to 33% and complies with Low-NOx emission requirements of less than 40 ng/J. Coregard Anode Rod - • Our anode rods have a stainless steel core that extends the life of the anode rod allowing superior tank protection far longer than standard anode rods. Blue Diamond Glass Coating - Provides superior corrosion resistance compared to industry standard glass lining. Ultra-Low NOx complies with requirements in California of less than 10 ng/J NOx Emissions Specifications : Nominal Capacity : 50 Rated Storage Volume : 48 UEF : 0.61 Self Cleaning : Yes Limited Warranty Tank : 6 Limited Warranty Parts : 6 Limited Warranty Labor : 1 Max BTUs Input : 40,000 Emissions : Ultra-Low NOx Ignition Type : Piezo push button Foam Insulation : Yes Water Connection Location : Top Water Connection Size : 3/4 First Hour Recovery (Gallons) : 84