We had a proper roof put on a few years back and on days we put the oil heater on it does get more than hot enough but is expensive to leave on all the time if we used it more regularly
We currently use an electric oil heater in our conservatory but tend to only use the room in winter for the odd occasion as it's too cold or expensive to have on too long. We are looking for something that may enable us to use it more often so am after any recommendations. Obviously ideally...