S-Shape ceiling panels are a unique way to address the problems of sound focusing and reflection normally associated with traditional hard surface finishes. The panels consist of two-dimensional pre-curved units that utilize one or two radii (inside and outside) throughout the curve. Interesting visuals are possible due to the distinctive shapes that can be achieved with these panels. A variety of mounting methods can be employed depending on plenum access requirements, available substrate, plenum clearance and panel joint preference. e.g. defined, closed reveal or open reveal.