The Helios Fans ALEF Hygro 5/45 is a humidity-sensitive air intake unit designed for installation in window frames. It automatically adjusts the supply of outside air depending on the relative humidity level inside rooms such as apartments and bedrooms, ensuring optimal indoor air quality.
This element includes an integrated airflow controller and limiter for regulated ventilation, along with an indoor facia, mounting plate, fly screen, and external cover strip. All components are crafted from durable, high-quality white polymer, offering both functionality and a neat appearance. This device is ideal for maintaining balanced ventilation that adapts to changing indoor humidity conditions.