HVAC ABBREVIATIONS

Abbreviations ABBREVIATION ACGIH           American Conference of Government Industrial Hygienists AIHA              American Industrial Hygiene Association ANSI              American National Standards Institute ASHRAE       American Society of Heating, Refrigerating and Air-Conditioning Engineers ASME            American Society of Mechanical Engineers AABC             Associated Air Balance Council ARI                 Air-Conditioning and Refrigeration Institute ASTM             American Society for Testing and Materials  AWS               American Welding Society BSI                 British Standards Institute CFC                Chlorofluorocarbon DB                  Dry Bulb DDC               Direct Digital Control DEP                Design and Engineering Practice DX                  Direct Expansion HCFC             Hydro-chlorofluorocarbon HVAC             Heating Ventilation and Air Conditioning IBC                 International Building Code IEC                 International Electrotechnical Commission  IMC                International Mechanical Code ISA                 The Instrumentation, Systems, and Automation Society ISO                 International Standards Organisation MERV            Minimum Efficiency Reporting Value MSS                Manufacturers Standardization Society of the Valve and Fitting Industry  NC                   Noise criteria NFPA              National Fire Protection Association Codes NEBB              National Environmental Balancing Bureau  NRP                New Refinery Project PPM                Parts per million RH                   Relative Humidity SMACNA       Steel Metal and Air Conditioning Contractors' National Association STB                 Sand trapping box TEMA             Standards of Tubular Exchanger Manufacturers Association. UBC                Universal Building Code UL                   Underwriter's Laboratory UV                   Ultraviolet