i recently purchased a very small 1925 house, it has no furnace boiler or radiators. the prior owner put a cove heater in the living room and the kitchen has a small heater in the wall, new and like a portable heater. the bathroom has no heat in it and the basement has the same as the kitchen. the house is around 900 sqare feet total, the first floor is only around 500. i could use any help or advise as what is the best choice to do, thank you