These fans are usually used in small air conditioning systems or places that require low static pressure. It is worth mentioning that because these fans are bent forward, they cannot be used to exhaust smoke.
Specifications of forward fans produced in Sepahan Hovatraz Company:
To transfer air in different scales
Ability to produce in different dimensions
They need little space
low noise
low speed and blade tip speed (low linear speed)
20000 cfm aeration and 1.5"wg static pressure
If the type of use is correctly determined by the engineers, the smallest fan size is the one with high efficiency.