Maximum insulation thicknesses:
IRRD-DW1 18: ≈ 20 mm
IRRD-DW1 21: ≈ 30 mm
IRRD-DW1 32: ≈ 30 mm
IRRD-DW1 43: ≈ 40 mm
It might be possible to install the doors on slightly thicker insulation thicknesses, but their installation might turn out being more difficult. Please provide the insulation thickness when ordering.
Not all combinations between duct diameters, insulation thicknesses and opening dimensions are possible. Please fill out this form in order for us to asses the feasibility and revert with prices and lead time indications. These access doors IRRD-DW1 are always considered as "special". For more information about special / custom made products please refer to the ZI-000.