NASA reclassified this as fifth level; Renumbered/ Superseded by UFGS 23 74 33.00 40 Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners
[NOTE: May 2024, Navy published a new UFGS section with the same number (23 74 33 Dedicated Outdoor Air Systems (DOAS)) but completely unrelated to this NASA section. To keep these specification sections separate, this NASA section was moved from the UFGS page to the NASA UFGS page]