EUROVENT 4/23-2022: selection of EN ISO 16890 rated air filter classes for general ventilation applications – fourth edition published

Stockholm, Sweden, 20th January 2022 - Leading air filter manufacturer Camfil, welcomes the fourth edition of the Recommendation 4/23 that aligns with the 2021 World Health Organisation’s (WHO) global air quality guidelines where the levels at which the main air pollutants are deemed harmful have been lowered, compared to the former WHO guideline from 2005.