An exhaust system for a cooking or cooktop appliance is provided herein. The exhaust system may include a casing, an image monitor, an air handler, and a diverter plate. The casing may define an air inlet and an air outlet above a cooktop appliance. The image monitor may be supported on the casing rearward from the air outlet. The image monitor may include an imagining surface extending in a vertical direction between a top edge and a bottom edge. The air handler may be mounted within the casing in fluid communication between the air inlet and outlet. The diverter plate may be attached to the casing below the imaging surface. The air outlet may be defined proximal to the top edge and may define a coolant airflow path. The diverter plate may define an airflow curtain path extending outward from the coolant airflow path.