In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
EDR calculations for steam
I'm not 100% sure, of course, but I did my best to find out. I have 4 different types of radiators in the house:
3 column (2.5" columns)
2 column (3" columns)
5 tube(1.5" tubes)
5 tube (1" tube) (this is a newer "slenderized" radiator)
You can take a look a my calculations here if you want: