ENERGY STAR® qualified 6-year limited Tank warranty, 6-year parts warranty for Residential applications 40,000 Natural Gas BTU Input per hour Automatic Flue Damper increases efficiency as it automatically opens and closes to reduce heat loss Electronic Gas Control provided enhanced operating parameters and tighter differentials for precise sensing and faster heating response to optimize performance. The electronic gas control incorporates an LED status indicator that monitors system operation and service diagnostics. Heater operates with an automatic pilot relight system that shuts off the pilot during stand-by modes to reduce gas consumption and eliminates nuisance pilot outage issues associated with standing pilot models. Requires Electricity - plugs into standard 110/120v outlet (10' power cord included) Lime Fighter® Dip Tube helps reduce lime and sediment buildup, maximize hot water output. Made of a cross-linked PEX polymer that can withstand long-term exposure to water temperatures up to 400°F. Green Choice® Eco-Friendly Gas Burner - Patented Low NOx burner reduces emissions by up to 33% and complies with less than 40 ng/j requirements for Low NOx. Glasslined Tank for long-lasting protection against corrosion. Anode Rod helps protect against corrosion and maximizes tank life. Factory installed CSA Certified and ASME Rated Temperature & Pressure (T&P) relief valve FVIR Compliant gas water heater design