The Helios Fans ZTV 100 is a thermostatic ventilation valve made from impact-resistant white polymer. It features an internal sound-absorbing insulation film that helps prevent condensation buildup within the valve. Equipped with a built-in temperature sensor, the valve automatically adjusts its opening according to temperature changes independently of the outside environment. The valve’s temperature sensor operates within a range of ‑5°C to +35°C. Additionally, it provides sound attenuation between 30 and 35 dB, ensuring quiet operation while maintaining efficient airflow control.