Product Overview Manuals and Guides Product Overview Williams Furnace Vent Extension for Direct Vent Furnaces. It is for use with walls that are 9 - 15 inches thick. 15" Extension for a 22,000 BTU Direct Vent Furnaces, model 22038 and 30,000 BTU Direct Vent Furnaces, model 3003 Product Manuals
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![Williams Furnace Company 9806 Vent Extension Tubes for Direct Vent Furnaces - 12" Length](https://cdn11.bigcommerce.com/s-7wqdm8gvmj/images/stencil/260x200/products/8034/18546/caea2c32-b754-4481-b74e-02928d929de7__09566.1510807412.jpg?c=2 "Williams Furnace Company 9806 Vent Extension Tubes for Direct Vent Furnaces - 12" Length")
