Panasonic's WhisperLine in-line ventilation fans are designed for easy installation and quiet operation (as little as 1.0 sones). With an efficacy rating of 3.3 to 4.2 cfm/w (cubic feet per minute per watt) of air they are very energy efficient. They have a long life condenser motors with thermal fuse protection rated for continuous use. The galvanized steel housings are insulated to reduce noise and condensation, and the duct adapters are tapered to facilitate duct connections. These in-line fans also feature an adjustable airflow control for multi-inlet balancing. Included are suspension brackets and truss or joist attachment brackets.
With these fans you can:
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Download the Panasonic Bathroom Fan Cross Reference Guide