Information about RolloTron Comfort DuoFern 1800/1805/1840 Y. Beenen Updated March 31, 2024 07:43 Follow We are happy to answer all your questions on general and technical topics in our FAQ section. Forwarding to the FAQ - area Related articles Operating instructions RolloTron Comfort DuoFern 1800/1840/1805 Activate login mode: RolloTron Comfort DuoFern 1800/1805/1840 How does the astro function work, in which case is a sensor necessary? Registration RolloTron Comfort DuoFern Information about RolloTron Standard DuoFern 1400/1405/1440