However, a radiator is currently attached to the wall underneath the windows, with a radiator cover (the typical board with holes) covering the front, and a windowsill covering the top. I'm figuring that I could either leave the radiator on the wall and build the seat around it, with the same type of radio cover as the front of the bench, or I could pull the radiator off the wall and move it forward a bit to get it closer to the cover. This would allow me to use the space between the wall and the radiator for storage, and I presume the radiation of the heater would improve somewhat if it was closer to the cover. I figure I could also use some flexible PEX pipe to go back and forth on the wall a few times before connecting it to the radiator, so that there would be a heat source right under the wall, and the radiator would still be close to the front of the bench.
What are the pros and cons of both configurations? Would both combat the cold air from the windows in roughly the same manner? Would the effect of moving the radiator forward be negligible in terms of improving radiation?