Quality Criteria

4 Criteria

These four criteria of a rectangular flange affect the performance of your ductwork,
as not all rectangular connections are created equal!


Any leaks increase the energy consumption, the generation of noises
and influence negatively the air-quality.

The METU solution: a prominent edge in the corner area (1)
and a metal to metal sealing-lip (2)

Weak Profiles

The profile deflection influences the the efficiency and integrity of the system,
its applications range and the appearance of the installation.

The METU Solution: a hollow triangular profile (3)

Weak Corner Pieces

The corner piece strength influences the air-tightness of the assembly, the required number of clamps and the required number of supports.

The METU Solution: deeply press-formed corners (4) and the support leg of the profile (5)

Torsional Strength

A gap between the profiles influences the air-tightness of the connections,
the appearance of the installation and the required number of clamps.

The METU Solution: the supporting leg (5) offers a important resistance against torsion.