Golden engineering co offers air ventilator, which is a combination of both natural and forced air ventilation system. It is a free spinning roof ventilator, which works on free wind energy. It functions as a natural ventilator when there is a difference in thermal or wind pressure between the inside and outside of the building, which forces the air to move through the opening of the ventilator. It also acts as a forced ventilation system when the turbovent rotates to create a negative pressure within the building. Cooler air from outside will rush into the negative space within the building in order to maintain an equilibrium condition. With continuous r & d the company has developed the widest series of ventilators in neck diameter 4, 6, 8, 12, 14, 16, 18, 21, 24 and 28 inches.
