We use a little ceramic heater in cold weather also. If fact my "to-do" list includes installing a dedicated outlet for the heater. Probably at the baseboard of the kitchen cabinets. My goal is to piggy-back off the breaker for the air conditioner (since they won't be operating at the same time) and thus free up the electrical load on the normal breakers.
1995 Chevy G20 aka "Big Blue",
1994 GMC Camper Van,