History: Below is a listing of the Revisions and Changes made to this UFGS.
| KEY | PREPARING ACTIVITY (PA) | A Army | N Navy | F Air Force | S NASA [ARCHIVED] |
|---|---|---|---|---|---|
| ACTION | N New | R Revision | C Change | D Deletion |
| Release | PA | Date | Action | Change # | Nature of Change or Revision |
|---|---|---|---|---|---|
| Feb-2020 | N | Feb-2020 | N | New specification covering the requirements for variable refrigerant flow (VRF) type air conditioning and heat pumps systems and accessories in conjunction with UFGS 23 09 00 Instrumentation and Control for HVAC, UFGS 23 09 23.01 LONWORKS Direct Digital Control for HVAC and Other Building Control Systems, UFGS 23 09 23.02 BACNET Direct Digital Control for HVAC and Other Building Control Systems, UFC 3-410-01, Heating, Ventilating, and Air Conditioning Systems, and UFC 3-410-02 Direct Digital Control for HVAC and Building Control Systems. |
