The Helios Fans ZLA 100 is a complete ventilation intake valve designed for installation in wall and ceiling openings. The set includes a thermostatic valve, telescopic wall sleeve, integrated air filter cassette, and a durable external shutter, all made from impact-resistant white polymer. A built-in temperature sensor automatically adjusts the valve opening based on external temperatures, ensuring energy-efficient ventilation. The internal surface of the valve is specially coated to prevent condensation buildup. Additionally, the ZLA 100 offers effective sound attenuation in the range of 30 – 35 dB, helping maintain quiet indoor environments.