B Vent is CE certified to EN1856-1 with the designation T250 N1 D Vm L11040 050 (certificate number 0036 CPD9195013).
It is also kitemarked to BS715 1993 (certificate number KM5518 in 100 and 125 diameters) and is manufactured under the Quality Assurance requirements of BS EN ISO 9001.

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