Designed for external, roof-mounted installation at the ends of ventilation ducts in residential, commercial and industrial buildings with low levels of particulate air pollution. The fan can work with the CSR-B controller, which will ensure stable ventilation operation under all conditions and exactly according to the design guidelines.

![LK25-A-3P[1]](https://brookvent.info/wp-content/uploads/2023/11/LK25-A-3P1.jpg)