Many local building codes now mandate mechanical ventilation in kitchens, making a range hood more than just an aesthetic choice. Properly installed hoods help clear out steam, smoke, grease and harmful combustion byproducts—especially important if you cook with gas. When evaluating whether to add or upgrade a hood, homeowners should weigh factors like ducted versus ductless designs, airflow capacity, noise levels, installation costs and how a quality ventilation system can protect indoor air quality and even enhance resale value.