sci.engr.heat-vent-ac
Terms, Professional Societies, etc.

Q:   What acronyms are commonly used in this group?

A:   These are some of the most common:

     HVAC      Heating, Ventilating and Air Conditioning

    
     ASHRAE    American Society of Heating, Refrigerating and Air
               Conditioning Engineers
               1791 Tullie Circle, N.E., Atlanta, GA 30329
               Voice: (404) 636-8400
               Facsimile: (404) 321-5478
               Customer Service: 1-800-527-4723

     RSES      Refrigeration Service Engineers Society
               1666 Rand Road, Des Plaines, IL  60016-3552
               Voice: (312) 297-6464
               Fax: (312) 297-5038

     IAQ       Indoor Air Quality

     CFC       Generally refers to Chlorofluorocarbon family of
               refrigerants.  Sometimes called Freon

     HCFC      Generally refers to Halogenated Chlorofluorocarbon family of
               refrigerants.

     HFC       Generally refers to Hydrofluorocarbon family of refrigerants

     DDC       Direct Digital Control

     VFD       Variable Frequency Drive - Electronic speed control for
               motors.

     VAV       Variable Air Volume

     WC        water column,  common measure of air pressure used in HVAC systems

     IWC       Inches of water column,  commonly used in the USA