Chamberlain G6530111 Self-Regulating Heater 115/230V (Tape Wrap)
Coiled heater cable is installed in the frame of the operator, helping to regulate the temperature. The cable delivers about 25 watts of heat at 50°F but this rises to about 50 watts at temperatures below freezing. In gear-reduced machines, this keeps gear oil from becoming sluggish, which causes poor operation at low temperatures. In all machines, it helps keep the unit dry, particularly useful when heavy condensation is experienced. As the ambient temperature rises above 70°F, the output of the heater cable continues to fall, until almost no heat is given off at high summer temperatures.