I asked about adding heat strips to a former MH and was told that if your current unit isn't wired for it - with a harness, breaker, and thermostat- it wasn't an easy job or worth the time, trouble and money. Plug in ceramic heater will work just as well and be much cheaper and easier. That was sort of what I was thinking at the time and never bothered to research it much further so I ditched the idea.