Why this ducting earns its place
Square 350 mm ducting packs serious capacity into a compact profile. Where round ducting of equivalent diameter would be circular and cumbersome, square pipe slides into tighter spaces—above suspended ceilings, along walls, through confined vertical shafts. At 350 × 350 mm, you're handling the airflow equivalent of a mid-to-large round duct while using floor space more efficiently.
The 2 kg weight keeps installation practical; these sections still need proper support, but they won't require reinforced bracketing over and above what round ducting would demand. Aluminium construction resists corrosion and internal grease adhesion, and the square profile allows ductwork runs to fit neatly into architectural grid lines and structural bays—an advantage when you're retrofitting extraction into an existing ceiling void or when aesthetics matter in view of the customer.
350 mm square is popular in fit-outs where extraction needs to be discreet, especially in restaurants with visible ceilings or retail food spaces. You get serious throughput—equivalent to or better than a 300 mm round duct—in a profile that tucks into tight spaces and looks intentional when exposed.
