Roof pass-throughs made of steel, black coated, L= 98 9mm, connection diameter 170 mm made for connection to the insulated ducting type ISDR, outer diameter 200 mm
Thermal conductivity-coefficient:
ISDR 160/125 en ISDR200/170: (λ) 0.040 W/m·K
ISDR 250/200: (λ) 0,038 W/m·K