Hi Paula,
I would recommend a woodburner. For us, the downside of both gas and parrafin is that they put out a lot of water vapour and we think that they smell and use up the oxygen in the room.
It's easy enough to start with a simple wood stove for little money, especially second hand. We have a pretty big stove that also heats our radiators and towel rails so the whole house is warm. They use surprisingly little wood and if you have trees to prune then is free! PM me if you would like more info, we are in Perello.