BOILER CASE STUDY Biopharmaceutical Company Northern California Hybrid Boiler System CUSTOMER APPLICATION AND KEY CHALLENGES A large Northern California bio- pharmaceutical company operates a research campus with Cleaver- Brooks Flextube Boilers in many of their buildings. The boilers were only six years old when the Bay Area Air Quality Management District began including smaller boilers in regulated emission control standards. As a result, the boilers were required to meet the new NOx and CO emission levels, as well as flue stack tempera- ture criteria. After evaluating a number of retro- grade options for the existing boilers, including a heat recovery unit on the exhaust flues and changing the exist- ing mechanical linkage system to an electronic emissions system, all

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