Identification of volatile markers for indoor fungal growth and chemotaxonomic classification of Aspergillus species

► Fungi and volatiles were isolated from water-damaged buildings. ► Indoor sesquiterpene biomarkers for specific fungi are proposed. ► Fungal volatiles were used for classification of 56 Aspergillus strains. ► Chaetomium species were differentiated from 76 indoor fungi based on volatiles. ► Species-specific VOCs and VOC patterns useful in chemotaxonomy were highlighted.