Because of it’s unique condenser motor design, this 70 CFM fan is rated to run continuously while using 1/4th the electricity of the typical wall fan. At 1.1 sones, it is virtually silent. It can be used as a spot ventilator to clear out temporary moisture and odors, or left running for continuous exhaust of stale indoor air. The price includes a flexible 8″ diameter duct (adjustable from 5 1/2″ to 8″ in length) and a sturdy galvanized exterior wall grill.
Panasonic WhisperWall Wall Mounted Fan