Available opening dimensions and insulation thicknesses
18 180 × 80 mm A = min. 25 mm / max. 150 mm
21 200 × 100 mm A = min. 25 mm / max. 150 mm
32 300 × 200 mm A = min. 25 mm / max. 145 mm
43 400 × 300 mm A = min. 25 mm / max. 145 mm
The IRRD-3DE Access Door is to be installed on an outside insulated round ducts. The insulation is soft and covered with an aluminum foil. Can also be installed on a double-wall duct.
Take the self-adhesive paper template and apply onto the duct making sure it is well centered inside the opening you just created in the insulation. Then cut the round duct along the edge of the template.