Patent ID: 8651064

Claim:
A method to control a boiler assembly, comprising: (a) providing a boiler assembly having an output demand; a first boiler housing; a first boiler unit located in the first boiler housing with first boiler operating parameters, a first flue gas exit, and a first boiler control unit operable to control the first boiler unit; a second boiler unit located in the first boiler housing with second boiler operating parameters, a second flue gas exit, and a second boiler control unit operable to control the second boiler unit and wherein the first boiler control unit is operable to control the second boiler control unit; a first common flue connected to both the first flue gas exit and the second flue gas exit; a first interface; and a first interface control system operable to communicate with the first boiler control unit, the second boiler control unit, and the first interface; (b) sensing changes in the output demand; (c) coordinating operation of the first and second boiler units, via the first boiler control unit, in response to the changes in the output demand; (d) communicating a request from the first interface to the first boiler control unit, via the first interface control system, to alter the first and second boiler unit operating parameters; and (e) altering the first and second boiler unit operating parameters in response to the request.