Noise Criteria
Sections
HVAC Noise Criteria and Sound Level Standards
Technical analysis of NC curves, RC Mark II methodology, recommended noise criteria by space type, background noise measurement procedures, and speech interference levels for HVAC systems.
Guest Room HVAC Systems
Comparison of PTAC, fan coil, VRF, and split systems for hotel guest rooms including performance, noise criteria, and ventilation compliance.
Hotel Bathroom Exhaust Systems
Detailed engineering analysis of hotel bathroom exhaust including continuous vs intermittent strategies, code-required exhaust rates, centralized vs decentralized systems, makeup air pathways, acoustic design for guest comfort, and energy recovery opportunities.
HVAC Acoustic Considerations in Lecture Halls
Noise criteria, air velocity limits, duct-borne and structure-borne noise control, terminal unit selection, and equipment isolation for quiet auditoriums.
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.
Noise Criteria for Engine Test Cell HVAC Systems
NC rating targets, octave band analysis, HVAC equipment specifications, background noise requirements, and measurement protocols for engine test facility acoustics.
NC 20 Noise Criteria for Concert Halls
Achieve NC 20 background noise in concert halls through low-velocity air systems, duct silencer design, equipment isolation, and comprehensive 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.