Winter again in Central Florida, my shack is very airy so I only heat the best sealed room, the problem is that the wireing is way too old to consider useing electrical for heat. I need a small, cheap, trustworthy heater that I can leave on overnight, main heater is a propane unit with about a 20 inch burner strip. Its fine for major heat needs but I do not need major heat very often, only about 20 nights out of the year. What are your ideas? Most nights here only require a handful of candles and a couple of cats to provide heat but that is not trustworthy nor economically sound. A fire here would eat this place in a couple of minutes due to age and dryness. There is a smoke stack but its way to old to use wood heat, it originally served the kitchen also, this place is so old.