The RWC62 and RWC82 controllers from Siemens Building Technologies, Inc. (Buffalo Grove, IL) provide users independent, standalone ddc control precision, according to the manufacturer. The RWC62 features one digital input, independent setpoints for heating and cooling or day/night setback, and the proportional band can be adjusted from 2¿ to 180¿F. The RWC82 can be programmed for one sequence or for heating or cooling as a three-position, floating controller; as a two-position (on/off) controller; or for one- or two-stage heating and/or cooling.