High Induction Air Diffusers


The system is based on circular metal duct, which, via micro-perforations create a correct distribution of the air in the environment, thuogh high efficency inductive processes.

The diameter and number of holes are calibrated for each specific condition, in order to produce a distribution of the air pressure field around the duct.

This allows  a low speed mouvement of the enviromental air mass, then

  • a constant temperature is spread,

  • unconfortable air currents are eliminated,

  • air layers are reduced,

  • the ventilation induced by the holes prevents condensation.

The diameter of the holes is specially designed to optimize the synergistic effect between the strong induction, produced by the smaller holes, and the thrust of  air conditiong, modulated through the larger holes.

Why choosing Zefiro?


Zefiro is fully customisable, adaptable to every environment and it's easy to install!


Zefiro can be used for ventilation, conditioning, heating or refrigeration purposes.


Zefiro riduce stratification, condensation and humidity, being moreover energy efficient.


Stainless Steel AISI 304: 0.5 mm, 0.8 mm, 1.0 mm thickness.

Acciaio Zincato: 0.5 mm, 0.8 mm, 1.0 mm thickness.

Design finishing: Ral Painting Finishing

Fabric: assorted colors


Zefiro design is customised for each individual installation in order to to define an effective and correct distribution of the air, depending on the mass flow and the extraction launch from each section.

The choice of complements and the morphology of the holes are obtained by software based on mathematical models with Computational Fluid Dynamics (CFD).


Poliedra's technical office offers you a global support to best suit your ventilation system needs.

Poliedra SRL

Via Ponchielli 5, 20833 Giussano MB Italy

email: info@poliedra.com

Telephone: +39 0362 311245  Fax: +39 0362 310237 

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