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Sizing steam boiler questions
I am looking to replace my old gas fired steam boiler and have a couple of questions on sizing the boiler.
1) Most of my radiators are standard column type so I can calculate their square feet of radiation but I have two radiators of a different type in my bathrooms. See attached pics. They are both fairly small. How can I calculate the square footage of radiation for these radiators?
2) Does the insulation of my house impact the sizing of the steam boiler in any way? I live in a 1931 brick Tudor house with no insulation in the walls - there are two layers of brick, a 3/4" air space and then the interior plaster walls. There is some rockwool insulation in the attic at the floor level (not between the rafters).