Rectangular ventilation ducts are produced of galvanized, aluminium
and stainless steel sheet with 100x100 mm up to 2000x2000 and optionally
in larger dimensions.
Rectangular ducting is available in low and medium-pressure versions and the version for
smoke extraction systems. The range includes also rectangular ducts preinsulated inside
with mineral wool having high acoustic and thermal properties.
In case of thermal insulation, it is possible to cover the external surface of a duct
with aluminium, galvanized or stainless steel sheet.
In the case of larger sections of duct, additional straight and cross reinforcement is made
depending on a size of a duct and assumed pressure inside an installation.