I wouldn"t think of living ANYWHERE that was cold in winter without having a wood-burning stove in the house. Relying on modern technology,and gas & electricity is sheer folly !!In the meantime ,use candles by all means,but try putting a candle on a plate or saucer,and then covering it with a "terra cotta" flower- pot,if you still have that kind of thing in America or Canada !!It will act like a small stove,and several of them in the same room will be quite effective. Also, if the candle falls over,it can"t set fire to anything. Be careful with space-heaters if they burn oil or gas---If you tape up your windows,as someone has suggested,you might get a build-up of CO,or CO 2, which could be most unpleasant !! Get a wood-stove next year,and spend your summers chopping logs !!