The Helios Fans ALEFS Hygro 5/45 is a humidity-sensitive air intake element designed for mounting in window frames. It automatically adjusts the outside air supply depending on the relative humidity levels inside rooms such as apartments and bedrooms, ensuring optimal ventilation.
This unit features an integrated airflow controller, limiter, and additional sound attenuation to reduce noise. It includes an indoor facia, mounting plate, fly screen, and external cover strip, all crafted from durable, high-quality white polymer. The ALEFS Hygro 5/45 combines effective humidity-controlled ventilation with improved acoustic comfort, suitable for residential or commercial use.