Can a oil tank style electric heater keep a 15x25' bonus room with cathedral ceiling moderately comfortable in my Virginia winter? It would augment my regular heat pump but this room doesn't get adequate flow out the vents. It is usually 5 degrees cooler than the rest of the house so at times goes down into low 60's depending on the time of day and temp my programmable thermostat keeps the rest of the house. This is the room I run my woodstove, but increased demands on my time are such that I am becoming a casual woodburner so only get to burn on certain evenings. I'd like to at least keep the room a few degrees warmer during the day and evenings when I cannot burn. Just have no experience running supplemental electric heat.