Numbers and Titles



Includesair-to-air type energy recovery units.
See23 57 00 for heat exchangers for HVAC.
23 72 13Heat-Wheel Air-to-Air Energy-Recovery Equipment
23 72 16Heat-Pipe Air-to-Air Energy-Recovery Equipment
23 72 19Fixed-Plate Air-to-Air Energy-Recovery Equipment
23 72 23Packaged Air-to-Air Energy-Recovery Units