The standard ventilation of the BHSLD model is intended for use over standard cooking equipment. Click on the models for a list of our base model numbers for standard sizes; simply select the model you need, and then specify the finish [painted or stainless steel]. All liners in this series are 19 1/4" deep. Recommended mounting height is 24" - 27" above the cooking surface. All Vent-A-Hood products are suitable for use in damp locations [outdoor applications such as a covered patio] when installed in a GFCI protected branch circuit.