Avoid costly changes to existing plans by addressing the credit requirements early in design. Typical changes often include adding supply silencers or return silencers; duct layout reworking; adding lined ducts or flexible ducts, diffusers, lined sound bo

Avoid costly changes to existing plans by addressing the credit requirements early in design. Typical changes often include adding supply silencers or return silencers; duct layout reworking; adding lined ducts or flexible ducts, diffusers, lined sound boots, double gypsum layers; or making classroom location changes. The need to make changes like these late in the game could be minimized or eliminated with early incorporation of acoustical goals.