Most people think of ventilating a building or room only when they feel uncomfortably hot. Until they feel the discomfort caused by accumulated hot air, the idea of ventilation seldom occurs. There are other reasons for ventilating a building which are less prevalent.
The most cost effective form of ventilation would be a hole in the roof, as this would allow the air to escape naturally. However this is generally impractical as a hole will allow dust, rain etc. to enter the building. We have a unique solution for all your above ventilation problems, the BIGBIRD ventilator is the most economical solution for all your ventilation problems.