The scope of this standard covers a method of test for the humidification rate of commercial and industrial isothermal humidifiers. This method of test 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. PURPOSE This standard method of test establishes a uniform method of laboratory testing for rating commercial and industrial isothermal humidifiers.