Forced draft cooling tower installations are becoming increasingly more popular. Cooling tower technology allows for a fan to be mounted on the top or bottom of a cooling tower. Cooling towers with top mounted fans are called “induced draft” cooling towers and cooling towers with bottom mounted fans are called “forced draft” cooling towers.
Induced draft cooling towers frequently employ a fan, coupling, gear box, drive shaft and motor at the top of the cooling tower. This equipment is used to induce air from the bottom air inlet louvers up through the fill media. This location accelerates wear and tear of the equipment because it is exposed to the elements (sun, rain, snow, etc.), and is positioned in the hot, corrosive exhaust airstream. This makes the mechanical equipment difficult, expensive, time-intensive and dangerous to maintain.
Forced draft cooling towers have the mechanical equipment at the bottom of the tower. This location allows the equipment to operate in the cool, dry intake airstream protected from the elements. This location makes the equipment accessible from ground level so it is easy, inexpensive, less time consuming and much safer to repair while enjoying substantially increased life expectancy of the mechanical equipment.