Specifications include, but are not limited to: • 20 gallon tank capacity • Unit should be rated at l8kw • 208 volt three phase • Unit shall be listed with Underwriters Laboratories and approved to the National Sanitation Foundation standard No. 5 • All internal surfaces of the tank shall be glass lined with an alkaline borosilicate composition that has been fused-to-steel by firing at a temperature of l600°F • Tank shall be cathodically protected with powered anodes. • The entire vessel shall have a baked enamel finish • Equipped with electronic control with LCD or LED display • Electronic display should have current water heaterstatus, provide real time element status, low water cutoff and economy mode operation.