Maximum performance: 250 watt Capacity fan: 70 m3/hour Performance fan: 20 – 35 m3/hour Size: 70,4 x 52,4 x 5,5 cm SolarVenti SV3 Slimline is mounted on wall or roof. SV3 has the same fan and sun cell as SV2, but is not equal in length and width. The amount of hot air from the small models, does not exceed levels for temperature and m3 that makes thermostat/regulator unit necessary. That is why SV3 and SV2 as standard are delivered only with on/off switch.