Posted by Roger Link on May 11, 2001 at 08:53:49:
In Reply to: Boiler capacity EDR posted by John McKay on May 04, 2001 at 10:58:29:
: We have three 6 MMBtu CB boilers, water tube. The new standards are based on heating surface area. Cant find the specs to get the conversion. Is there a standard conversion factor?
John, Consider the following:
For the 6MMBtuh value rating ...divide that number by 240 to get an EDR rating of 25,000.
To obtain EDR rating based on boiler horsepower, multiply the BHp by 140...thus the 179.24 BHp boiler will have an EDR of 25,093.60.
To obtain EDR rating based on Pounds of Condensate per hour...multiply pph of condensate by 4...thus the evaporation rate of 34.5 pounds per boiler HP or 6183 pph condensate times 4 equals 24735 EDR.
I cannot explain the differences in the numbers but this will get you close enough I think.
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