Noise Criteria
Sections
Guest Room HVAC Systems
Comparison of PTAC, fan coil, VRF, and split systems for hotel guest rooms including performance, noise criteria, and ventilation compliance.
HVAC Acoustics in Classrooms
Technical guidance on HVAC noise control for classrooms per ANSI S12.60, including NC criteria, duct velocity limits, diffuser selection, and equipment placement strategies.
NC-30 Lecture Hall HVAC Acoustic Design
Technical guidance on achieving NC-30 acoustic criteria in lecture halls including octave band limits, speech intelligibility requirements, HVAC system design, and sound path analysis.
Background Noise Limits for Assembly Spaces
Technical guidance on establishing background noise limits for assembly spaces using NC/RC curves, speech privacy criteria, and masking principles per ASHRAE standards.
Acoustic Considerations for Assembly Space HVAC Systems
Comprehensive technical guidance on HVAC acoustic design for theaters, concert halls, and lecture halls including NC curve requirements, sound power analysis, and low-velocity strategies.