The Interfan branded AC fan for critical power systems is a key component for the proper cooling on the unit. It is usually necessary to change out every 3-5 years, but can vary based on the location and storage of the unit. These fans are used to cool the heat sinks of the critical power components and also remove excessive heat from the wound components such as a transformer. Failure to replace fans once they have stopped working can result in further destruction to your critical power unit. During Lorbel’s preventative maintenance service, our technicians check the integrity of the unit and internal components including fans to make sure all components are working at 100% efficiency for the best coverage on customer’s critical load. We offer different voltages and ratings based on whatever your applications requires.