42" Viking Island Hood is 18" High and 30" Deep. Optional 600 CFM (interior) and/or 900 CFM (exterior) ventilator. The Hood is Equiped with four lights and four filters. - A 1,200 CFM or 1,500 CFM (interior or exterior) ventilator should be used when installed over range/cooktop with gas char-grill. This hood requires a ventilator. Please select one or both below. Shown with optional duct cover