The White-Rodgers M150 single-stage, heat/cool thermostat is an easy-to-operate thermostat with reliable performance. This mercury-free mechanical thermostat features rugged snap-action contacts, adjustable heat anticipator and bimetal thermometer. This thermostat is compatible with single-stage heating and cooling (gas, oil, electric), and heat pump systems without auxiliary heat, as well as millivolt and 3-wire zone valve applications.

• Mechanical heat/cool thermostat for use on single stage heating, cooling and heat pump (without aux) systems
• Works with 3-wire zone valve and millivolt (750mV) applications
• Easy to install and use
• Not compatible with multi-stage systems, heat pump with Aux and electric baseboard (120/240V)
• Mercury-free thermostat
• Mechanical heat/cool thermostat
• Compatible with single-stage and heat pump (no aux) gas, oil, electric sytems