The Helios Fans ZLA 125 IB 22 is an internal panel designed for use with the ZLA 125 ventilation system. Constructed from durable white polymer, it delivers a consistent airflow rate of 22 m³/h, ensuring balanced ventilation performance. The panel includes an integrated coarse dust filter rated ISO Coarse 30%, providing effective filtration of large airborne particles. This inner panel is ideal for maintaining clean and steady airflow in residential or commercial ventilation setups.