Master Flow Replacement Shutter for 30 in. Belt Drive Whole House Fan

The S30 is the replacement shutter for the GAF Master Flow 30 in. Belt Drive Whole House Fan (30BWHFS). It installs easily and is constructed of aluminum. The gravity louvers open when the unit it running and close when the unit shuts off.

• Replacement Shutter for Master Flow 30BWHFS
• Felt-tipped louvers help reduce noise and vibration
• Aluminum construction