Development and verification of a new natural ventilation system for offices utilizing low-temperature outdoorTakuro Fujii, Hiroaki Tanaka, Toshio Yamanaka, Tomohiro Kobayashi, Toshihisa Momoi, Narae Choi and Miho WakasaE3S Web Conf., 689 (2026) 05001DOI: https://doi.org/10.1051/e3sconf/202668905001