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The Euro classification construction products directive enables various performance classes (A to F) to be established for wall and roofing products and floor-coverings. Higher classifications are achieved from good performances in the SBI apparatus, for roofing and wall lining products, or in Flooring Radiant Panel test for flooring products. FTT make both of these apparatus.

"The Single Flame Source Test" is built in accordance with “ISO 11925-2: Reaction to fire tests for building products – Part 2: Ignitability when subjected to direct impingement of flame”. The apparatus is based on the German Kleinbrenner method for determining ignitability of building products in the vertical orientation by direct small flame impingement under zero impressed irradiance.