Cac ceiling attenuation class is a standard measurement of a ceiling system s ability to block sound between two closed spaces cac values of 35 or greater are recommended to achieve speech privacy. Optima is available in more standard sizes than any other product in the armstrong ceilings portfolio including large sizes trapezoid panels and custom options. Optima lay in and tegular 3251 is part of the optima lay in and tegular line from armstrong ceiling solutions commercial.
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