I have a 180 square foot room that faces North. There is a large window on the north side that spans about 9 feet -- and there are two windows on the east side that span about 5 feet. Other walls are interior. The room is directly above the garage - hardwood feels cold. We have one strip baseboard under the window - maybe about 8 feet. That is all heat in room. Does not seem to be able to heat the room. How much baseboard is recommended for this room? Seems like maybe I should put another 5 foot strip on other window? more less? Other suggestions?