The difference between induced or forced draft

Induced draft implies an inlet fan placed on top of the cooling tower and the creation of low pressure. Axial fans are always used for this type of draft.

Forced draft means an exhaust fan placed at the base of the cooling tower which then causes overpressure. Both axial and centrifugal fans can be used.

Almeco’s cooling tower range contains all different types.

Induced draft - Axial fan

Advantages

Disadvantages

Low absorbed capacity
Small foot print (requiring little space)

Higher noise level
Humid air stream drive

Forced draft - Axial fan

Advantages	Disadvantages
Low absorbed capacity Easy maintenance Dry air stream drive	Higher noise level

Forced draft - Centrifugal fan

Advantages	Disadvantages
Low noise level Easy maintenance Dry air stream drive	Higher absorbed capacity