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Steam unit heaters

todd s
todd s Member Posts: 212
I need some help sizing these units for a boiler replacement. The system is a 1-pipe steam connected to 3 unit heaters. There are no radiators at all. Two of these units are ILG and measure 22x19x5 and one is an American Blower measuring 24x24x12. If we can't find the EDR of these can we figure out sq ft steam by the model of the old american standard boiler? I would rather not use method two. Thanks in advance.
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