Simulation of Annual Functionality of Roof Turbine Ventilator Streckienė Giedrė, Motuzienė Violeta, Rimdžius Dovydas, Martinaitis Vytautas and Bielskus Juozas E3S Web Conf., 64 (2018) 07002 Published online: 27 November 2018 DOI: 10.1051/e3sconf/20186407002