As measured by the norm (ERP2018), the speed adjustable motor of this fire-resistant fan has a better energy efficiency, a durable and maintenance free high-precision ball bearing, as well as a thermal safety switch. The connection and regulation technology is located inside the high-quality junction box. The RadiCal impeller by ebm-papst is equipped with backwards curved blades. This construction guarantees a good airflow, even with depression, like it develops during the operation with filters. Thanks to the new, flow-optimized plastic housing PrimaKlima was able to lower the noise of the fan. The startup is easy and fast with read-for-use Schuko connection-plug. The robust mounting bracket enables the perfect placing of the fan.