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Photocatalytic air purifiers for indoor airEuropean standard and pilot room experiments.. PubMed. Costarramone, N; Cantau, C; Desauziers, V; Pécheyran, C; Pigot, T; Lacombe, S. 2017 05 01. At the European level (CEN/TC386), some efforts are currently devoted to new standards for comparing the efficiency of commercial photocatalytic material/devices in various application fields.