Markel Products Co. ET9DTS DPST Heat Only Thermostat

The Markel Products Co. ET9DTS Heat Only Thermostat is a line-voltage mechanical temperature control component designed for regulating heating operation in HVAC systems. It operates within a part temperature range of 50F to 90F, allowing manual adjustment to maintain desired room or temperatures. The unit features a double-pole single-throw switch configuration, supporting safe switching of higher electrical loads used in electric heaters and unit heaters. Rated for 120277V applications with approximately 22A capacity, it is installed in wall-mounted or equipment control setups where it operates as a primary heat control equipment .