Dynaclean™ diffuser dip tube helps reduce lime and sediment buildup, maximizes hot water output and is made from long lasting PEX cross-linked polymer Coregard™ 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 Green Choice® gas burner featuring 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 CSA certified and ASME rated T&P relief valve Solid brass, tamper resistant, enhanced flow, ball type drain valve Eco-friendly non-CFC foam insulation, heat traps and specially designed combustion chamber combine to produce a high energy factor for maximum savings on operating costs Heat trap nipples are factory installed Blue Diamond® glass coating provides superior corrosion resistance compared to the industry standard glass lining 10-year limited tank and parts warranty