System Application: Gas, Electric, Forced Air, Heat Pump, Radiant, Oil, Hot Water, Solar and Geothermal; Stages Heat/Cool: Up to 3/2; Power Method: 24V Hardwired; Terminal Designations: C, RH, RC, W1, W2, W3, Y1, Y2, O/B, AUX, E, HUM, DEHUM, G; Color: Steel; Connected: Yes;