Heavy-duty construction professional-type size, construction, design, and styling. Seamless design with no visible screws. Halogen lights for better visibility and efficiency. Dimmer on lights allows custom lighting - separate on/off switch allows consumer to leave dimmer at favorite position. Delay feature allows consumer to set the ventilator to shut off on its own from 10 to 30 minutes later. 12-hour timer built into ventilator controls excellent for use with Designer Series cooking products. All hoods have a heat sensor that turns the ventilator on full power when cooking temperatures reach uncomfortable levels. Choose from interior or exterior ventilators. Both interior and exterior ventilators work with variable speed controls for custom venting separate on/off switch allows consumer to leave ventilator at favorite setting.