Jan 25, 2015
The thought occurred to me that , back in the day, I used to use a 600 Watt halogen lamp to heat the sides of cars/trucks I was stripping. They throw a huge amount of heat. That would work for you - aim it at the pipe area and plug it into the temperature sensitive outlet switch. You will be able to warm the area and could see (if the lights were on) if it was cold enough inside (35°) to trigger the switch.
That would use 2/5 the amount of electricity as a 1500 watt space heater.