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Fiberglass Exhaust Fans

Airborne corrosive mists and gases, conveyed in process exhausts or present in the surrounding ambient environment, cause metal degradation and promote premature equipment failure. The presents of compounds and gases such as hydrogen sulfide, ammonia, nitrogen oxides, hydrogen chloride, and chlorine, require construction using chemically resistant materials.  Fan and blower construction might be a composite of polymer and fibers, a synthetic plastic polymer or a grade of stainless steel.  Stainless steel construction might be an acceptable alternative depending on the air stream chemistry, but a plastic composite construction is often recommended.

Fans and blowers of plastic composites, selected for severe duty applications, are most often constructed of FRP (Fibre-reinforced plastic), PVC (Polyvinyl Chloride), and PP (Polypropylene), with selection based upon temperature, air stream constituents and particulate physical characteristics.  We’ve found that FRP is the primary “go to” design, followed by PVC and PP.

Plastic fans are vital for many industrial process applications where corrosive and chemically aggressive environments exist.   SysTech selects and applies these plastic fans and blowers to provide:

  • Maximum protection in an aggressive environment or air stream
  • Cost efficiency
  • Low noise
  • Efficient operation
  • Rugged durability
  • Ease of maintenance

Fiberglass Exhaust Fan Performance

  • Axial Roof Exhausters up to 73,000 CFM up to 60” dia.
  • Inline Axial Fans up to 70,000 CFM and 6 Inches WG up to 60” dia.
  • Centrifugal Fans up to 130,000 CFM and 25 Inches WG up to 60” dia.

Want to know what fan construction is required in your corrosive environment? Download the Material Corrosion Resistance Guide


Material Corrosion Resistance Guide

FRP Exhaust Fans and Blowers

Plastic exhaust fans are mainly Fiberglass, with PVC construction available for some applications and cost savings.  Fiberglass reinforced plastic or FRP exhaust fans and blowers are known for their ability to handle a wide range of corrosive applications and temperatures to 250 degrees Fahrenheit. FRP axial and centrifugal fans are designed for corrosive air stream applications in which metal fans will not withstand hostile environments or aggressive conditions. Fiberglass exhaust fans operate in corrosive applications with high efficiency and low noise characteristics and have the following features:

  • Solid fiberglass housings
  • High pressure wheels available
  • Abrasive-resistant coating available
  • Surfacing Veil – Nexus is standard, C Glass optional
  • One-piece die-formed FRP wheel
  • Standard UV inhibitor and flame retardant resin
  • Encapsulated stainless steel hardware in airstream

Fume Exhaust Fans

A secondary group of plastic fans typically used in industrial ventilation systems is those constructed of synthetic plastic polymers, polypropylene (PP) and polyvinyl chloride (PVC). Most plastic fans purchased is of PVC construction. They are relatively inexpensive and able to withstand a broad range of aggressive environments and temperature to 165°F for polypropylene wheels and 140° F for PVC housings. PVC fans are an excellent choice for the efficient conveyance of corrosive, chemically laden, humid, or polluted gases, fumes, and air. Flame-retardant and corrosion resistant, they are especially suited for hostile environments in which coated metals fail.

  • Impellers in either polypropylene or PVDF
  • Injection molded blades for high efficiency
  • No metal in airstream

Where FRP Fans Are Applied


Wastewater Treatment Plant Schematic

Available Fiberglass Exhaust Fan Designs

  • Upblast and Downblast Dome Exhausters
  • Wall Ventilators
  • Upblast and Hooded Roof Ventilators
  • Duct Fan
  • Duct Axial Fan
  • Centrifugal Fans – Optional Backwardly Curved or Radial Wheels
  • Inline Centrifugal Fan
  • Bypass Fan

Products Purchased With FRP Fans

Complementing our fans is a complete package of FRP, PVC and CPVC air system components including:

SysTech offers a wide selection of corrosive environment equipment.  Let us match the correct materials of construction with your airstream constituents and assist with all your corrosive environment needs.

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