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ANSI/ASHRAE Standard 164.4-2021

Methods of Test for Commercial and Industrial Adiabatic Humidifiers

Establishes a uniform method of laboratory performance testing of commercial and industrial adiabatic humidifiers. Describes a method of test for the humidification rate and evaporation efficiency of commercial and industrial adiabatic humidifiers as defined in Section 3. Describes the test apparatus, conduct of the test, and information to be recorded. Information resulting from the application of this method of test is intended for use by manufacturers, specifiers, installers, and users of commercial and industrial humidifiers. Dual units of measurement.


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American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ASHRAE]


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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