ANSI/ASHRAE 64-2011
First published in 1974 and revised in 1989, 1995, and 2005, Standard 64 has been updated in this edition in several ways. SI units have now been made the primary units throughout the standard, language such as should and recommended that is not enforceable has been removed or revised, references have been updated to the most recent editions, and various editorial improvements have been made.This standard specifies procedures, apparatus, and instrumentation by which determinations of remote mechanical draft evaporative refrigerant condenser capacity can be obtained by laboratory testing with accuracy satisfactory to be used as the basis for commercial ratings.