Sunleaves WindTunnel 6 For inline ventilation, it doesn t get any better than Sunleaves WindTunnel Fans. Permanently sealed and lubricated ball bearings support the zero-resistance blade rotation for smooth, dependable operation. The durable plastic WindTunnel 6 casing also helps to minimize noise production. Pushing 409 cubic feet per minute, this 120-volt, 70-watt model has an 11 total diameter and 6 opening to accommodate ducting of the same size.WindTunnels have a five-year manufacturer s warranty.
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