Historical
ANSI Y32.2.4-1949 (R1998)
Graphic Symbols for Heating, Ventilating and Air Conditioning
This Standard has been developed for use on drawing. Architects, contractors, and engineers, by the use of these symbols on their plans, will have a standard method of indication for heating, air conditioning, and allied items. Confusion in the interpretations of requirements can thus be avoided.
Content Provider
American Society of Mechanical Engineers [asme]