The Vent-Axia Lo-carbonised Flow Fan NBR DMEV C 100 is a high-energy-efficient extractor fan suitable for ventilation systems. With a switch control style and a power source of electricity, this 4-inch diameter fan operates continuously to provide optimal airflow. Made from durable plastic material in a sleek white colour, this centrifugal fan is designed for quiet operation and efficient performance. With an energy efficiency rating of A, the Vent-Axia fan is a reliable choice for maintaining healthy indoor air circulation.