Smart energy management of combined ventilation systems in a nZEB Javier M. Rey-Hernández, Sergio Lorenzo González, Julio F. San José-Alonso, Ana Tejero-González, Eloy Velasco-Gómez and Francisco J. Rey-Martínez E3S Web Conf., 111 (2019) 01050 Published online: 13 August 2019 DOI: 10.1051/e3sconf/201911101050