Great thanks for the helpful suggestions. I've been looking at finned pipes that might give better performance? Though 3" would surely do it. And yes , it's not the main source of heat, just to counteract the down draught. I'm no plumber but when I get hold of one, I hope to work out what all...
Hello. I have a bench seat running under 3 windows. About 2 meters across, it gets a very cold down draught from the windows. I would like to put a radiator in behind the back of the seat but there is only 40mm clearance before I hit the outside wall.
Instead of trying to fit a slim line...