Summary This review surveys online resources relevant to ventilation systems in underground mines. It lists ventilation software, publications, courses, consultants, and suppliers. Topics discussed include the basics of ventilation systems, regulations, and design principles. INTRODUCTION Ventilation is a basic part of all underground mine operations. Ventilation is undertaken in order to introduce fresh, cool air to the workings and to remove stale, affected air from the workings. In this technology review, we look at the basics of ventilation, the regulations, and the people, companies, and equipment you may need for installing, operating, and maintaining a ventilation system at your mine. The need for ventilation in an underground mine is described thus by Hardcastle, Kocsis, and Lacroix in a paper from the CIM 2007 conference, entitled Strategic mine ventilation control: A source of potential energy savings . Ventilation in underground mines is re...