The thermostat automatically turns these heaters on when the temperature drops below 38° F and turns them off when the temperature reaches 45° F.

With a cable that supplies the same wattage along the entire length, these heaters remain consistent regardless of the surrounding temperature. All require a temperature switch or controller to regulate heat output.

Also known as self-regulating heat cable, these heaters automatically adjust heat output at different points along their length to account for differences in environmental temperature.