NeedHelp Identifying Steam Convectors

Mark_35

Trying to do some EDR calculations for new boiler. Can anyone identify the convectors (see pix). The house is 1935, has two-pipe vapor system with Trane B-1 traps and Trane Return trap over old boiler. These convectors are recessed in wall - some two pipe with 3-1/2" wide by 2" deep fins and and some three pipe with 5-1/4" x 2" fins. Copper tubes and copper fins. Cast iron headers fed from below only with tappings on top. They are mostly 24" high. Have adjustable damper as shown. Does anyone know what these are and have any tables for these.

Mark B

gerry gill

these..

http://www.heatinghelp.com/pdfs/218.pdf ---courtesy of steamhead.

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Mark_35

That look like it - THANKS!