Ventilation rate determination method for residential buildings according to TVOC emissions from building materials

People spend most of their time indoors in residential buildings; thus, maintaining good indoor air quality (IAQ) is essential. It is necessary to provide a suitable ventilation rate in these spaces (low-density occupation) taking into account that materials (finishes and furnishing) are one of the main sources of indoor pollution. For that purpose, this research, based on both the National Research Council (NRC) database and a specific case study, followed a method that consisted of the identification of indoor pollution sources, evaluation of the emission factor and characterization of the IAQ. It is intended to show the influence of materials (quantity, type and age), loading ratio and pollution concentration threshold in the calculation of a ventilation rate which guarantees a good IAQ. This study also reflects the need to bring together an overall pollution concentration threshold of TVOC, below which a safe level of exposure to indoor pollution is recognized. •There is a significant influence of building materials on the ventilation needed.•The three-step methodology followed provides an advance in the field of research.•Key parameters are: indoor sources, TVOC and HCHO levels and maximum concentration.•The establishment of TVOC concentration threshold for a good IAQ is demonstrated.