Ensure that your new range hood is installed properly with the Windster 36W in. Under Cabinet Wall Extension. Intended for use with 36-inch wide range hoods made by Windster, this wall extension is made from sturdy, long-lasting stainless steel to best match the hood frame. Range hoods must be placed directly over the cooking surface at a height of between 28- or 32-inch above the surface. This unit helps you fine-tune your installation to make sure your blower is able to service your kitchen properly. This wall-extension has been approved for use by the CSA for use in both US and Canadian homes.