GU62-40T40R American Water Heater ProLine 40 Gallon Ultra-Low NOx Natural Gas Water Heater ProLine 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 applicationsIntelligent 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 : 40Rated Storage Volume : 38UEF : 0.64Self Cleaning : YesLimited Warranty Tank : 6Limited Warranty Parts : 6Limited Warranty Labor : 1Max BTUs Input : 40,000Emissions : Ultra-Low NOxIgnition Type : Piezo push buttonFoam Insulation : YesWater Connection Location : TopWater Connection Size : 3/4First Hour Recovery (Gallons) : 81