The purpose of this Eurovent Recommendation is to reduce the number of available standard front dimension of filters used in air handling installations. Such a standardisation would be of interest for all parties involved: manufacturers, installers, designers and users. The Recommendation has been prepared by the Eurovent Product Group ‘Air Filters’ (PG-FIL) in co-operation with the Eurovent Product Group ‘Air Handling Units’ (PG-AHU). This document is available in English