FTSs Chilling Kit for 7 Gallon Standard ChronicalA properly controlled fermentation temperature is critical to producing quality beer. The Fermentation Temperature Stabilization System (FTSs) is the result of many napkin sketches and applying thermodynamics to advanced brewing practices. The system is elegant in its simplicity yet incredibly efficient. The Ss Brewtech FTSs uses a precision temperature controller that constantly monitors the temperature of your fermentation to within 1 of its set