The Range Hood Liner is designed to be installed with Faber's built-in inserts. Liners create a perfectly-sealed, non-combustible finish for the underside of your custom wood hood. A liner is a stainless steel shell that is installed underneath an insert hood. The liner accessory for the Inca smart. This Liner is used for the following hoods: Inca smart, Inca HC SS. Some reasons why liners should be used with every built-in range hood include: They are 4 inches tall which provides additional capture area under the range hood to capture cooking odors, local building codes may require that exposed wood above the stove be covered by metal, stainless steel is easier to clean than wood, the life of the cabinetry is extended since the exposure to cooking contaminants is reduced underneath the cabinet, the liner gives a more complete and integrated look to the insert hood.