This standard prescribes the methods for testing the performance
of air-to-air heat/energy exchangers.
In this standard, an air-to-air heat/energy exchanger is a device to transfer heat and/or water vapor from one airstream to another. The types of air-to-air heat/energy exchangers covered by this standard are:
a. regenerative energy exchangers (including heat wheels
and total energy wheels),
b. heat pipe exchangers,
c. thermosiphon exchangers,
d. recovery loop exchangers (also called run-around
exchangers), and
e. fixed-plate exchangers.
The scope of this standard also includes both laboratory and field tests, provided that appropriate levels of uncertainty can be achieved when testing.
A test is deemed to be within the scope of this standard if both a pre-test uncertainty analysis and a post-test uncertainty analysis yield satisfactory uncertainty limits.
ASHRAE 84-2008 history
2024ASHRAE 84-2020 Standard 84-2020 -- Method of Testing Air-to-Air Heat/Energy Exchangers (ANSI Approved)
2013ASHRAE 84-2013 Method of Testing Air-to-Air Heat/Energy Exchangers
2008ASHRAE 84-2008 Method of Testing Air-to-Air Heat/Energy Exchangers
1991ASHRAE 84-1991 Method of Testing Air-to-Air Heat Exchangers