Technical Booklet L Combustion Appliances and Fuel Storage Systems·Page 90·B.10
Sootfire resistance classes
Sootfire resistance class is designated as 'G' for products with sootfire resistance (tested at 1000°C for 30 minutes) or 'O' for products without sootfire resistance.
Sootfire resistance class – expressed as either 'G' with sootfire resistance, or 'O' without. A product assigned the designation 'G' has been tested at 1000ºC for 30 minutes.
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