Improving the way to measure particulate emissions of road vehicles, and thus contributing to reducing transport pollution? This is now possible, thanks to recently published standard EN 17507 ‘Road vehicles - Portable Emission Measuring Systems (PEMS) - Performance assessment’.

This standard, developed by 'CEN/TC 301 - Road vehicles', aims to qualify the measurement uncertainties of portable particle emission measurement systems (PEMS) used in real driving tests. The qualification of the different components of PEMS is of particular importance in the context of the tightening of particulate emissions thresholds. EU legislation foresees the definition of tolerated emission thresholds by taking measurements of an uncertainty factor, based on the objective precision of the portable measuring means. Thanks to the new standard, this precision is now set to improve and the uncertainty factor to be reduced. The new EN 17507 provides the elements to assess this progression. With this new standard, CEN – the European Committee for European Standardization - brings a new contribution of European standardization to the efforts to address transport pollution, a major challenge in the context of the EU Green Deal.

When talking about energy efficiency, one of the most overlooked appliances is fans. Fans of all types are used for ventilation and air conditioning, for process engineering, and agriculture. Their energy use has been calculated as nearly 20% of total worldwide energy usage. To ensure that the fan performance characteristics are common throughout the world, a series of standards has just been developed by ISO and adopted by CEN.

Among these, the recently published EN ISO 12759-5 'Fans-Efficiency classification for fans - Part 5: Jet fans' establishes a classification of fan efficiency for all jet fan types driven by motors with an electrical input power range from 5,5 kW to 155 kW. Jet fans are used for producing a jet of air in a space, unconnected to any ducting. They find applications in the control of quality of air in vehicle and train tunnels, as well as in enclosed car parks, and their use has become increasingly popular (from EN ISO 13350:2015 'Fans - Performance testing of jet fans').

This document was prepared by Technical Committee ISO/TC 117 'Fans', in collaboration with the CEN/TC 156 'Ventilation for buildings', whose Secretariat is held by BSI, the British Standards Institute.