CEN and ISO Ventilation and IAQ Standards

ISO JWG TC163-205 and CEN TC156 has in parallel developed similar standards for Indoor Environmental Quality (DIS-17772, prEN16798-1). An important part of these standards are recommended criteria for IAQ and ventilation rates to be used by design and input to energy performance calculations for buildings. The standards deal with both residential and non-residential buildings. The recommendations for acceptable indoor air quality and ventilation are specified as classes. This allows for national differences in the requirements and also for designing buildings for different quality levels, and will initiate a better dialogue between the client (builder, owner) and the designer.