Fantech 4 inch Inline Duct Fan FR100

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Product Description

A multi-purpose inline duct fan for exhaust or supply air; ideal for various residential and commercial ventilation applications including crawl-space venting, and air duct boosting. The FR100 is not for Radon mitigation use. For Radon applications, use our Rn1 Radon mitigation fan.

With the motor in the airstream, the FR100 series fan provides constant dissipation of heat build-up that gives the fan first-in-class longevity and reliability backed by an industry leading warranty.

The housing is manufactured from two molded, plastic pieces. The unique, vibration welding process uses reciprocating motion at the point of contact to join the two halves and create a single housing. The fused seam is inherently airtight and permanent.

The fan housing uses a large, electrical wiring enclosure to make electrical installation easier. This airtight fan ensures that contaminants do not spill because of leakage and it can be mounted in indoor, outdoor, and damp locations.

The fan’s motor bearings are permanently sealed and self-lubricating for maintenance-free life.
Choose from a variety of duct accessories to make your installation straightforward and time efficient.


  • Durable, leak-free, low noise operation
  • Corrosion and heat-resistant housing
  • Indoor/outdoor use
  • Built-in thermal overload protection with automatic reset
  • Operable in air stream temperatures up to 140°F
  • Mounting bracket and hardware included
  • ENERGY STAR® listed
  • Five-year factory warranty

Fan Specifications

  • Energy star rated
  • Impeller speed: 3000
  • Voltage: 115
  • Input power: 20
  • Input current: 0.17 A
  • Duct Dia.: 4"
  • Maximum Airflow: 151 cfm