ASHRAE 84:2013

This revision of ANSI/ASHRAE Standard 84 provides rules for the testing of air-to-air heat/energy exchangers in both the laboratory and the field. This new edition stipulates the desired uncertainty while allowing laboratories the flexibility of selecting various testing apparatus as long as the uncertainty limits are satisfied. This revision also provides reformatted versions of the fundamental effectiveness equations (1-1) and (1-2) and the developed effectiveness equation (30). Additionally, this edition addresses the impacts on test validity of testing at conditions in which condensate and frosting can occur.