Snap Acting Thermostat, 18-30Vac, 1 Stage Heat Only, SPST Switching Action, 45-95 Degree Temperature Setting Range, 5-90% RH Operating Humidity Range, ± 3 Degree Accuracy, Snap Action, Premier White, Includes Wallplate, Resistor Assembly, Mounting Screws and Wall Anchors

T812A1002 is the direct replacement for PSM30SA