They got used ones on ebay, but these are the cheapest new ones I found. I guess ebay is the same.
karmaxul Reviewed by karmaxul on . Cheap inline fans high power Fantech FanTech FR Series non-Estar Fans FanTech fans are remote mounted in-line variable-speed centrifugal fans, suitable to exhaust from bathrooms, additions, and laundry rooms. The fan features a UL recognized, UV protected, thermoplastic resin housing, able to be mounted outdoors if necessary. The fans are caulked at the motor screws, the wiring cables, and along the seams of the fan to prevent moisture from entering the house. The fans feature a totally enclosed motor, permitting use in Rating: 5