The building inspector got back to us and described the 125% more clearly. The number is just a reasonable goal and he referenced IECC 503.2.1
503.2.1 Calculation of heating and cooling loads. Design loads shall be determined in accordance with the procedures described in the ASHRAE/ACCA...
The AHJ inspector in Massachusetts wanted documentation showing that the replacement boiler is no larger than 125% of the load. We have very little information about the building making it difficult to accurately model the building. In addition, we cannot find where the 125% is coming from. We...
The question is about a steam boiler replacement happening in Massachusetts. A limitation stating, the replacement boiler capacity must not exceed 125% of the total building load, was brought up by the inspector. To the best of our ability we were unable to locate this limitation in any code...