Hello Merlin83, with my parents it was exactly the same that a convector heater in front of the windows was recommended. The conservatory has been standing for about 12 years and the convector was not on a single time and my parents live in the Alps where in winter there can be 0.5m of snow on the outside of the windows. At the beginning they were a bit annoyed to have installed the radiator. But now many flowers stand on it and it hardly stands out anymore. It always depends on how the rest of the heating situation is. At my parents' place, there is a masonry stove at the transition between the living room, dining room and conservatory which heats the whole house. In the transition period spring / autumn the conservatory heats the rest of the house through solar radiation. But it depends on the orientation.