Fantech Alpha Relief Air Vents - Non Motorised | MRV1 / MRV2The Fantech Alpha Relief Air Vents are designed to regulate air pressure within commercial and industrial buildings. They can also be installed in ducted systems where the fan is mounted remotely to the cowl. Each unit is fitted with protective bird mesh to prevent debris and birds from entering, ensuring safe and reliable operation. Constructed from UV stabilised plastic, these vents are lightweight, durable, and corrosion proof, making them suitable