A. O. Smith’s high-efficiency Cyclone commercial gas water heater line is Energy Star-certified. Celebrating its 15th anniversary this year, the Cyclone models combine large-volume hot water delivery with maximum energy efficiency. Cyclone units are built with a superior glass-lining process and have powered anodes for maximum tank protection. Energy Star’s recent expanded scope makes the Cyclone family an ideal fit with its up to 96% thermal efficiency.