Building and ductwork airtightness in Estonia : national trends and requirementsKalamees, Targo; Hallik, Jaanus; Mikola, AloVentilation challenges in a changing world : the 42nd AIVC, 10th Tightvent and 8th venticool Conference : proceedings2022 / p. 640-641https://www.aivc.org/sites/default/files/download/AIVC2022_Proceedings.pdf