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Whisper-Supply Wall - Through wall supply fan - This item is no longer available in this size.

• Duct Diameter: 4"
• Air direction: intake
• Voltage: 120 VAC
• Noise (sones): <0.3
• Power consumption: 3.0 watts
• Speed (rpm): 2590
• Air volume at 0.03 iwg (system pressure): 10 cfm
• Weight: 5.3

In tight houses there is often not enough fresh air brought into bedroom where people spend most of their time. This little through-the-wall fan will reliably draw in just enough fresh air to keep the occupants comfortable. It includes a positive closing damper on the room side and an internal filter. The exterior hood is beautifully designed to present water intrusion.
This was a sample direct from Panasonic. This is a rare, but excellent product.