steam rating for old convectors

Dave Roate

I was on a jobsite in a beautiful old Victorian. The job is full of convectors with dual vertical elements. These convectors have a cast header on each end. The steam enters the header and fills both elements and returns through an identical header to a thermostatic trap at the opposite end. These are in excellent condition, but I don't have a rating for them. They were made by Mechanical Company, Chicago. There is a symbol, TU, and the words Thermal Unit, cast into the end of each convector. Does anyone have any ratings or direction where I can find them? Thanks, daver

bigugh_4

Idea ?

You might measure the fins size and count the fins per inch, and relate that to a modern convector,. Just an idea!