This is ALNOR's range of insulated square ducts and fittings of the IZOL®system. The IZOL®system is a registered tradename of pre-insulated ventilation ducts and fittings for indoor and outdoor systems. All system components are provided with inner and outer steel sheet cladding, and a thermal-insulation layer in between. The nominal diameter range of 100-500 mm always refers to the inner diameter of ducts and fittings.
Insulation There are 3 types of insulation available:
25 mm insulation — the nominal insulation system is 25 mm, and the actual value ranges from 15 to 32 mm; the insulating layer is fitted tightly against the inner and outer cladding which define the product's size according to the SPIRAL®system sizing series.
50 mm insulation — the nominal insulation system is 50 mm, and the actual value ranges from 35 to 60 mm; the insulating layer is fitted tightly against the inner and outer cladding which define the product's size according to the SPIRAL®system sizing series.
100 mm insulation — the nominal insulation system is 100 mm, and the actual value ranges from 75 to 140 mm; the insulating layer is fitted tightly against the inner and outer cladding which define the product's size according to the SPIRAL®system sizing series.
