The Ranco A30-1952 window A/C thermostat control for systems between 12,000 and 18,000 BTUs. These controls have SPST switching with “Off” position unless noted. They are compact and readily adaptable to nearly all residential window A/C units. A wide selection of temperature ranges, differentials, and capillary lengths are available. Break-off shafts are included with installation instructions for easy, fast installation.