The product features a specific airflow that offers exceptional comfort, along with the sustainability, performance and aesthetic versatility that are hallmarks of every Ventmann product. The PCircle Coanda’s design solves a specific challenge where the physics of creating air diffusers that create a “coanda effect” were at odds with the aesthetic requirements of designers and architects. This challenge has proved particularly difficult to solve in air diffusers that supply air, as opposed to those that simply extract it.
Modern buildings require high quality air supply and extraction. Occupants don’t expect to feel strong jets of air or currents, but a high amount of air still needs to be circulated according to modern building standards. Standard diffusers blow out air in spikes, with the air flow forming a shape like that of a torch light. But air diffusers that create a “coanda effect” can supply a very high volume of air without users feeling it. The “coanda effect” is when a jet of air or fluid wraps around and then follows the contours of a convex surface. In air diffusers, the effect is that the air flow spreads parallel to the ceiling rather than downwards in jets. This means if you are standing directly underneath the diffuser, you still won’t feel the direct jet of air – this makes it much more comfortable for users.
Because of the physics of creating the “coanda effect”, it is hard to have diffusers with the sharp 90° edges architects are looking for. But we have achieved this by offering a frameless design, a gypsum-based product that can be plastered over and painted.