Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
I visited a jobsite today to size the steam radiation for a replacement boiler. The first floor of the home has steam convectors recessed into the floor. The convector element consists of 2 rows of 10 finned cast iron tubes (20 tubes total). The tubes are 4" in diameter and are 28" long. The element is suspended beneath a grate in the floor, and it is enclosed in a sheet metal box that measures 38" long x 28" wide x 30" high. There is a 8" x 10" door in the bottom of the box that slides open or closed, and there are no other louvers in the enclosure. I am not sure how to calculate the sqft of radiation for this convector. Any thoughts?