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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.

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American Society of Mechanical Engineers [asme]

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