Operating Instructions DuoFern Sun Sensor 9478 F. Tepaße Updated February 04, 2024 10:11 Follow Download PDF Related articles Operating instructions Troll Comfort 5625 Operating instructions RolloTron Basis DuoFern 1200 Operating Instructions RolloTube I-line DuoFern ILFS / ILFM How many environmental sensors are needed to shade all sides of the house depending on the position of the sun? In the morning the shutters in the east, at noon in the south and in the afternoon the shutters in the west should move down to the sun positio