The Helios Fans ZLA 160 is a comprehensive ventilation valve kit designed for installation in wall and ceiling openings. It includes a thermostatic valve, telescopic wall sleeve, built-in air filter cassette, and a sturdy external shutter, all made from impact-resistant white polymer. The integrated temperature sensor automatically adjusts the valve opening regardless of outside temperature, optimizing airflow and energy efficiency. The valve interior is coated to prevent condensation buildup. Additionally, it offers sound attenuation between 30 and 35 dB, ensuring quiet operation in residential or commercial ventilation systems.