![Master Flow S30 Automatic Fan Shutter, Aluminum, Enamel [SKU: ORG6834139]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/600x600/products/55238/54316/6834139__38938.1692625398.jpg?c=1 "Master Flow S30 Automatic Fan Shutter, Aluminum, Enamel [SKU: ORG6834139]")
![Master Flow S30 Automatic Fan Shutter, Aluminum, Enamel [SKU: ORG6834139]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/1280x1280/products/55238/54316/6834139__38938.1692625398.jpg?c=1 "Master Flow S30 Automatic Fan Shutter, Aluminum, Enamel [SKU: ORG6834139]")
Product Overview
Injection molded frame with smooth aluminum louvers that automatically open when fan turns on, and close when fan turns off to keep out air, insects, and dust, Balanced shutters for complete automatic service-free operation. [QTY/UOM: 1EA / 1EA]
![Master Flow S36N Automatic Fan Shutter, Aluminum, Enamel [SKU: ORG6834238]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/55239/54317/6834238__89833.1692625398.jpg?c=1 "Master Flow S36N Automatic Fan Shutter, Aluminum, Enamel [SKU: ORG6834238]")
![Master Flow SGM20 Power Vent Automatic Shutter, 19-1/4 in W, Aluminum, White [SKU: ORG6393649]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/89521/87498/6393649__13569.1692635584.jpg?c=1 "Master Flow SGM20 Power Vent Automatic Shutter, 19-1/4 in W, Aluminum, White [SKU: ORG6393649]")
![Master Flow WHFS24M Whole House Fan, 4500 cfm Air, Aluminum [SKU: ORG6928790]](https://cdn11.bigcommerce.com/s-iqof5nfcfj/images/stencil/500x659/products/25725/25586/6928790__89506.1691782098.jpg?c=1 "Master Flow WHFS24M Whole House Fan, 4500 cfm Air, Aluminum [SKU: ORG6928790]")
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