Photo 1 of 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

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Photo 1 of 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, RTR140Photo 2 of 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