In this book, the authors present topical research in the study of the types, standard and problems of ventilation. Topics discussed include non-conventional energy systems in building design; industrial ventilation systems; pulmonary ventilators as monitoring instruments; influence of the ventilation rate on radon and thoron progeny concentrations in a room; acoustic filters in a power system; RANS and LES turbulence models for indoor airflows and wind towers as natural ventilation devices