Proper sizing of industrial exhaust fans is fundamental to maintaining a safe, healthy, and productive work environment. Industrial spaces, such as factories, warehouses, workshops, and chemical plants, generate a variety of airborne contaminants, heat, and humidity that must be efficiently managed. An exhaust fan that is too small can lead to poor air quality and safety hazards, while an oversized fan may waste energy and create uncomfortable drafts. This comprehensive guide will help you understand every aspect of sizing exhaust fans for industrial applications, from key concepts and calculations to practical considerations and advanced strategies.