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Q: Can I reduce duct to 4 inches at the vent ???? A: You can use an adapter and reduce the Panasonic FV-30NLF1 fan to a 4 inch duct but that will reduce the airflow. |
Q: Can this fan be mounted vertically? A: The Panasonic FV30NLF1 can be mounted vertically. |
Q: Can I add a variable speed switch to control the fan? A: No. |