What to prepare before selecting a negative pressure fan

BESMAN offers box and bell mouth exhaust fan variants, with belt drive and direct drive options in the supplied catalogue. Choosing between them begins with the building plan and installation constraints, not a photograph of the fan.

Document the building and exhaust position

Note the building dimensions, intended fan wall or roof location, available opening, electrical supply and maintenance clearance. Confirm the livestock type and local climate. These details help the supplier compare fan variants within a complete ventilation design.

Compare the product variants

The catalogue includes box belt drive, box direct drive, bell mouth belt drive and bell mouth direct drive models. Review frame size, drive arrangement, blade material and installation details in the individual product specifications.

Check the rest of the air route

An exhaust fan also depends on where fresh air enters and how it moves through the building. Review inlets and, where relevant, cooling equipment alongside the fan schedule. Do not use a fan count from another building as a substitute for project-specific selection.

Send the house dimensions and planned fan location to BESMAN for a product discussion.