Wow, not bad .... you were able to heat a guest house with only one ~1500 watt electric heater? Of course the BTU output would still be only a little above 5000.
BTW, I thought that the surface of oil heaters is also quite cool and presents no fire danger?
I sure like our electric Holmes RV/shop radiant heater. There's something about radiant heat in that their standard ~5000 BTU output feels like a lot more. The pure radiant heat propane fireplace (no fans) in our stick house is also magical in how it comfortably heats almost the entire home. I'm a radiant believer.
