Hybrid Ventilation Systems for Reduced Lifetime Emissions in Cold Climates Mehrdad Rabani, Arnkell Jonas Petersen, Christian Steneng, Simon Utstøl and Haakon Halla E3S Web of Conf., 562 (2024) 02002 Published online: 07 August 2024 DOI: 10.1051/e3sconf/202456202002