The Vent-Axia Revive 7 SELV Lo-Carbon Ventilation Fan is a high-quality extractor fan designed for continuous ventilation systems. It features a wall or ceiling mounting option, a 4-inch diameter, and four different speeds for customizable airflow. With its energy-efficient design and LED display, this fan is perfect for maintaining a healthy indoor environment. The added features of a pullcord, timer, and humidistat make it convenient and versatile for any home or building. Made from durable plastic and in a sleek white colour, this Vent-Axia fan is a reliable choice for improving air circulation.