When we speak of ventilating rooms, what comes to mind is letting in fresh air into our homes by opening windows and turning on fans or the air conditioning system. When it comes to industrial ventilation, much bigger systems are needed. This is because apart from keeping the air fresh, it is necessary that airborne toxins be removed for the safety of the workers. There are a number of different systems to do this but it is industrial ventilation fans that are more commonly used. Industrial ventilation is a requirement of law and there are regulations as to how it should be done.