It's getting cold. My house is an ice brick. What's the most cost effective way to keep warm, when I don't have gas? (I rent so nothing permanent).
Apart from putting jumpers and trackies on which I already do. I usually have an oil heater with thermostat in DSs room to keep the chill out, and our bedroom is ok but our lounge room is freezing and last year our bill was insane with an electric fan type heater.