Transfer Fan, Room to Room, Metal, 11-7/8 Housing Length (In.), 3-1/2 Housing Width (In.) - Grainger
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Amazon.com: Suncourt TW408 ThruWall Room to Room Transfer Fan, Quiet 2-Speed Wall Mounted Plug-in Fan with 10 Foot Power Cord and Installation Kit : Tools & Home Improvement
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Amazon.com: SUPROCKY Room to Room Air Transfer Fan, Through Wall Exhaust Fan with Intelligent Programmed Air Exchange System, Hardwired, 3-Speed, In Wall Vent Fan with Temperature Sensor, 200CFM, RTR140 : Tools &
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ThruWall Suncourt 2-Speed Room to Room Transfer Fan, 8-in Corded Through Wall Fan, White in the Through Wall Fans department at Lowes.com
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