The Relaxo Heavy Duty Industrial Exhaust Fan is a robust ventilation fan designed for industrial settings. The fan has a blade diameter of 380 mm (approximately 15 inches). This size is suitable for industrial applications where large volumes of air need to be circulated and exhausted. It comes with four blades that are designed to efficiently move and exhaust air from the industrial space. The fan operates at a speed of 1400 RPM (Rotations Per Minute). This high rotational speed ensures effective air movement and ventilation in the industrial environment. The exhaust fan operates on a single-phase power supply. This is a standard power supply configuration for many industrial setups. As the name suggests, this exhaust fan is built to be heavy-duty, capable of withstanding demanding conditions in industrial environments. The color of the fan is mentioned as grey, which is a common color for industrial equipment and machinery. Industrial exhaust fans like this one play a crucial role in maintaining a comfortable and safe working environment by removing heat, humidity, and pollutants from the air. It is essential to ensure that the exhaust fan is appropriately sized and placed to maximize its efficiency in ventilating the industrial space.