Technical Booklet L Combustion Appliances and Fuel Storage Systems·Page 89·B.6
Matching appliances to chimneys
An appliance must generate combustion products with characteristics equal to or less than those designated for the chimney. When selecting a chimney for an appliance, any chimney with performance characteristics equal to or higher than those required for the appliance may be used.
In selecting an appliance for a given chimney designation, the appliance, irrespective of the fuel used, is required to generate combustion products with characteristics equal or less than those designated for the chimney. When selecting a chimney suitable for a given appliance, any chimney with performance characteristics equal to or higher than those appropriate for the appliance may be used.
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