The ICON HD Commercial Control System now is added to the company’s 100-gallon, 399,999 BTU/Hr. eF Series ultra-high efficiency water heater. The ICON HD is an intelligent Honeywell integrated control with a digital LCD display that combines temperature control, diagnostic codes, system functions, and operational status into a single, intuitive control unit. Features eight different service screens simplified access to troubleshooting features. Commercial water heaters equipped with ICON HD can be upgraded with the optional programmable setback control kit which features 7-day, 4 period/day programmability to customize temperatures to match usage patterns. The 100-gallon water heater is the largest of 12 eF Serie models, having thermal efficiency ratings as high as 94%, quiet operation, stainless steel alloy burner tube, durable direct spark ignition system, modulating blower, zero inch clearance to combustibles and multiple venting configurations.