HTST System- 25 GPM. Includes 100 gallon (378 liter) Balance Tank with lumenite level controls, Waukesha Model 60 positive displacement pump with 5hp SEW varidrive, Automatic Flow Divert Valve with Leak Detector, hot water set, 15 second holding tubes, 3 pen ABB Chart Recorder, ABB Flow Meter, and Cherry Burrell Stainless Triple Tube Heat Exchanger with three sections: REGEN, HEATING, and COOLING.