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Hi I’m new here
I’m trying to get the right size boiler, I just bought a house that was vacant for over 10 years, the heating system is a one pipe steam system, the current boiler there is a oil fired burner, but in my eyes it looks small for the system, also there is no paper saying what size it is
I measured all radiators and got a total 341 EDR, (without adding any pickup factors)
So I’m looking to buy a mega steam boiler, but can’t decide if to get the 396 or 513, because I don’t know if the number from the manufacturer, for an example the 396 represents the systems EDR needed without including the pickup factor, (then ill need the 396 because I need 341 EDR) or the number from the manufacturer is including the pickup factor (then I’ll need the 513)