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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 4 casing also helps to minimize noise production. Pushing 200 cubic feet per minute, this 120-volt, 40-watt model has a 10” total diameter and 4” opening to accommodate ducting of the same size. ETL-listed WindTunnels have a five-year manufacturer’s warranty.
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