Designed for use as a recovery water heater;Meets ASHRAE/IES 90.1-2004;Heavy-duty incoloy sheathing elements provide excellent protection against oxidation and scaling;Fusing protects all elements, thermostats, and internal wiring circuits against excess current flow;Factory installed terminal block for ease of installation;Temperature controls located behind hinged control compartment door for quick, easy access;Dual commercial-grade anode rods for maximum corrosion protection;Simplified circuitry, color coded for ease of service;3-year limited tank and 1-year limited parts warranty