I have one of those Amish style small space heaters down here in FL. And yes, it's actually been cold down here and we've needed the heat. So since it was just wifey and I, I thought I'd just heat the room we were in mostly with that little heater. Well the electric bill came and it seems that it's more expensive to heat only the room you're in, than the whole house with the 240 volt heat pump system we have. Those stupid little heaters are not very efficient.