Skylux lichtkoepel 90x90 cm KKB HEO 0800 0800 Then be sure to consider Then be sure to consider a Skylux 1100x1700 skylight Daylight size 1000 x 1000 mm Roof opening Equal to daylight size Passage opening 79 x 100 cm Number of actuators Single actuator Material Clear Number of walls Double walled Insulation value (Ug value) 1 W m²K Acoustic value Rw 39 dB Fall through safety Yes LT value 75 % g value 52 % Weight 44 kg m² Guarantee 10 years Whether you are looking for a fixed or opening version choose the reliable