Where there are multiple boilers/furnaces which are individually below the Clean Air Act threshold of 366.4 kilowatts and are served by several chimneys, how should we check whether or not exceedences of the NO2 objective are likely?


The potential for exceedance of the objective may be assessed using the Industrial Emissions Screening Tool, available here.

Alternatively, the table below provides aggregate thermal input rate screening limits for modular boiler installations with low NOx burners (<0.02g/MJ). Boiler installations with greater aggregate capacity than that given for a particular situation will require more detailed assessment.  The table is based on the information in the report here.

 air quality management


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