The Emerson Climate-White Rodgers 24A05E-1 208V Electric Heat Relay Normally Open is an essential component for managing electric heating systems, which are commonly found in furnaces and air handlers. Consider it as a specialty switch. When the circuit is in its open condition, the heating element cannot receive electricity. https://www.partshnc.com/24a05e-1-emerson-climate-white-rodgers-208v-elecheat-relay-no