A kitchen range hood is an appliance installed above a stove or cooktop to ventilate cooking odors, smoke, and steam. It works by drawing air through filters and expelling it outside or recirculating it back into the kitchen after cleaning. This helps maintain air quality and reduces the buildup of grease and moisture. Range hoods come in various styles, including wall-mounted, under-cabinet, and island hoods, catering to different kitchen layouts. They can be powered by either ducted systems, which vent air outside, or ductless systems, which filter and recirculate air. Proper installation and maintenance are essential for optimal performance.