For small and medium-sized rooms, low-energy ball bearing motor, suitable for wall and ceiling mounting, quiet and smooth running, ABS plastic housing, UV-resistant, including non-return valve, optical operating display, dimensions: 158 x 136 x 107 mm, installation dimension: 26 mm, pressure: 43 Pa, noise level: 25 dB(A) - at a distance of 3 meters, weight: 0.55 kg, delivery volume: 97 m³/h, PSQLKT100 version with follow-up relay, continuously adjustable from 2 - 30 min., PSQLKTH100 version with follow-up relay and humidity sensor, continuously adjustable from approx. 60 - 90% humidity