by swidders »
Wed Jan 14, 2009 5:46 pm
you could put the details of your room into a btu calculator (these are easily found free online such as on diy.com) which will give an indication of the wattage output (as well as the BTU for radiators) required to heat the room.
if you are not installing a wet system then dotting a few smaller heaters around will probably be better than one.