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New installed steam boiler may be too large
I am a home owner that would very much appreciate your help. We have just had our steam boiler replaced. I created a chart of all of the radiators in our home that gave the height, number of columns and sections as well as depth of the radiators to the contractor (who is a well respected expert in the area). While I should have finished sorting out how to calculate the rest of the equation, I did not and our 200 BTU boiler was replaced by a 207 BTU boiler.
I was organizing all of the material for the new unit today and for "fun" thought I would see if I could figure out how to do the rest of the calculations on the chart. Best I can tell, the EDR is between 372- 425, for a 2,200 square foot house.
I utilized 240 BTU per square foot to determine the BTU required.
I took into consideration 16% sea level adjustment and 20 percent efficiency adjustment but even with this I think the boiler has about 62,000 BTU more capacity than needed. I have not taken into account any of the piping of the system just the radiators.
Am I doing something wrong in my calculations?
I'm new to this forum but just read a post that talked about not over sizing the boiler or you get short cycles. Maybe my calcs are way off but if they are right is there anything I should do with the system since the boiler is already installed? All tips would be very welcome.
Thank you Maggie.