8-year limited Tank warranty, 8-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