Everywhere we went in Ireland, there were panel radiators. The places we stayed at generally used fuel oil or propane, although one town definitely had a sulfur--ey aroma in the air. Anyway, I take it these could be more efficient than baseboard. What is the best way to go to lower temperature water in an existing system - just add more baseboard or these panels? I have no idea what the cost of these things are. (I'm not sure if radiant floors will ever be in the cards).