The Hotsy 555HE features a high-efficiency downdraft burner delivering higher cleaning performance and lower operating costs. The stainless steel coil cover provides extra durability against the elements and rugged operating conditions. Auto-Start/Stop is a standard feature and offers increased efficiency in low voltage situations. The Hotsy triplex, direct drive, positive-displacement CERMAMIC PLUNGER pump carries a 7-year warranty and a 5-year warranty on the heating coil. The Hotsy 555HE is ETL-certified to UL-1776 safety standards.