EF-100T-150E-3N Bradford White 100 Gallon 150,000 BTU Commercial eF Series High Efficiency Gas Water Heater The eF Series utilizes exclusive designs and technologies for unsurpassed installation flexibility and performance. Ultra High Thermal Efficiencies make the Bradford White eF Series an exceptional commercial gas water heater. Several eF Series models are now ENERGY STAR qualified. Last but not least, the eF Series is extremely quiet, a feature building owners, managers and occupants will appreciate.ICON HD® - Intelligent proven design combines temperature control, diagnostic codes and system ignition functions into a single control board with a digital LCD displayENERGY STAR® Models Available - EF60T125 & EF100T (150,199,250,399) ModelsASME Construction AvailableElectronic ControlsLow-NOx Premix Power BurnerThree Pass Flue SystemFlexible Venting OptionsVitraglas® LiningHydrojet® Sediment Reduction SystemDielectric FittingsNon-CFC Foam Insulation Four Protective Magnesium Anode Rods (Except EF-100T-399)Two Powered Anode Rods and One Non-Powered Anode Rod in the EF-100T-399Hand Hole CleanoutZero Inch Clearance to CombustiblesNSF Construction AvailableT&P Relief ValveLow Restrictive Brass Drain ValveComplies with the Latest Ultra-Low NOx Requirement (14 ng/J NOx Limit)