converting One pipe steam \"AERO\" wall radiator.

BHKinLEB

When converting old steam radiators can i enter and exit the radiator low, or do i have to enter low and leave high. i'm using reverse return loop piping for four of these "AERO" wall radiators. I'm a first timer on the wall so be kind.

Steamhead (in transit)

You can use

supply into the top or bottom of one end and return out the bottom of the other, or supply in the top and return out the bottom of the same end. With return coming out the top, the radiator won't heat fully.