UFGS Changes and Revisions 
Related Materials: Policy on UFGS Changes and Revisions
Below is a listing of the Revisions and Changes made to UFGS Sections for each quarterly release.
To view a list for a specific UFGS Release, select the UFGS release date from the 'Release' drop-down and click 'Apply'.
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To view the complete detailed history of all the revisions and changes made to a UFGS Section, click on the Section title.
| KEY | PREPARING ACTIVITY (PA) | A Army | N Navy | F Air Force | S NASA |
|---|---|---|---|---|---|
| ACTION | N New | R Revision | C Change | D Deletion |
| Release | PA |
UFGS Section |
Date | Action | Change # | Nature of Change or Revision |
|---|---|---|---|---|---|---|
| Apr-2008 | S | UFGS 23 73 13.00 40 Modular Indoor Central-Station Air-Handling Units | Apr-2008 | R | Section References (SRF) update | |
| May-2014 | S | UFGS 23 73 13.00 40 Modular Indoor Central-Station Air-Handling Units | May-2014 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Aug-2008 | S | UFGS 23 73 13.00 40 Modular Indoor Central-Station Air-Handling Units | Apr-2008 | D | Renumbered/ Superseded by UFGS 23 73 13 with same title | |
| Feb-2011 | S | UFGS 23 73 13.00 40 Modular Indoor Central-Station Air-Handling Units | Feb-2011 | N | Renumbered to NASA fifth level; Superseding UFGS 22 14 29 with no title change; CCR #604 comments have been incorporated | |
| Jul-2007 | S | UFGS 23 73 13.00 40 Modular Indoor Central-Station Air-Handling Units | Jul-2007 | R | Section References (SRF) update | |
| Jun-2006 | S | UFGS 23 73 13.00 40 Modular Indoor Central-Station Air-Handling Units | Jun-2006 | N | New - Superseding UFGS 23 73 00.13 40 Modular Indoor Central-Station Air-Handling Units | |
| Jan-2007 | S | UFGS 23 73 33.00 40 Indoor Indirect Fuel-Fired Heating and Ventilating Units | Jun-2006 | D | Information already provided in UFGS 23 82 01.00 10 Warm Air Heating Systems Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Jun-2006 | S | UFGS 23 73 33.00 40 Indoor Indirect Fuel-Fired Heating and Ventilating Units | Jun-2006 | R | Title changed from HEATING/VENTILATION/AIR CONDITIONING SYSTEMS; Reference and Section References (SRF) updated | |
| Nov-2009 | S | UFGS 23 74 33 Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners | Nov-2009 | R | General update of section | |
| Aug-2008 | S | UFGS 23 74 33 Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners | Aug-2008 | N | Renumbered; Superseding UFGS 23 74 33.00 40 with same title; Minor Edits; Section References (SRF) update | |
| Feb-2011 | S | UFGS 23 74 33 Packaged, Outdoor, Heating and Cooling Makeup Air-Conditioners | Nov-2009 | D | NASA reclassified this as fifth level; Renumbered/ Superseded by UFGS 23 74 33.00 40 with same title Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| May-2017 | S | UFGS 23 74 33.00 40 Small HVAC Units, Cooling-Only, Recirculating, Split and Unitary for Window and Floor Mounting | May-2017 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Apr-2008 | S | UFGS 23 74 33.00 40 Small HVAC Units, Cooling-Only, Recirculating, Split and Unitary for Window and Floor Mounting | Apr-2008 | R | Section References (SRF) update | |
| Aug-2008 | S | UFGS 23 74 33.00 40 Small HVAC Units, Cooling-Only, Recirculating, Split and Unitary for Window and Floor Mounting | Apr-2008 | D | Renumbered/ Superseded by UFGS 23 74 33 with same title | |
| Feb-2011 | S | UFGS 23 74 33.00 40 Small HVAC Units, Cooling-Only, Recirculating, Split and Unitary for Window and Floor Mounting | Feb-2011 | N | Renumbered to NASA fifth level; Superseding UFGS 23 74 33 with no title change | |
| Apr-2007 | S | UFGS 23 74 33.00 40 Small HVAC Units, Cooling-Only, Recirculating, Split and Unitary for Window and Floor Mounting | Apr-2007 | R | Reference Update | |
| Jun-2006 | S | UFGS 23 74 33.00 40 Small HVAC Units, Cooling-Only, Recirculating, Split and Unitary for Window and Floor Mounting | Jun-2006 | R | Title changed from PACKAGED AIR-CONDITIONING UNITS; Reference and Section References (SRF) updated | |
| Feb-2020 | N | UFGS 23 75 15 Custom-Packaged, Aircraft Pre-Conditioned Air Units | Feb-2020 | N | New specification covering the requirements for high-pressure, preconditioned air units, ductwork and controls for aircraft cooling systems in conjunction with UFC 4-211-01, Aircraft Maintenance Hangars. | |
| Aug-2021 | N | UFGS 23 76 00 Evaporative Cooling Systems | Aug-2021 | N | New unified section; supersedes UFGS 23 76 00.00 10 EVAPORATIVE COOLING SYSTEMS and UFGS 23 76 00.00 20 EVAPORATIVE COOLING SYSTEM. | |
| Jan-2008 | A | UFGS 23 76 00.00 10 Evaporative Cooling Systems | Jan-2008 | R | Incorporated EPAct05 requirements | |
| Apr-2008 | A | UFGS 23 76 00.00 10 Evaporative Cooling Systems | Apr-2008 | R | Compliance with CSI SectionFormat | |
| Aug-2021 | A | UFGS 23 76 00.00 10 Evaporative Cooling Systems | Apr-2008 | D | Superseded by new unified UFGS 23 76 00 EVAPORATIVE COOLING SYSTEMS. Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Aug-2015 | N | UFGS 23 76 00.00 20 Evaporative Cooling System | Jul-2006 | C | 1 | UFGS sustainability/energy updates to comply with Navy and DoD policies to enforce requirements of UFC 1-200-02 "High Performance and Sustainable Building Requirements". |
| Aug-2018 | N | UFGS 23 76 00.00 20 Evaporative Cooling System | Jul-2006 | C | 2 | Sustainability updates required to coordinate with the Federal Codes and DoD policies and procedures. |
| Jul-2006 | N | UFGS 23 76 00.00 20 Evaporative Cooling System | Jul-2006 | R | Added sustainable design requirements | |
| Aug-2021 | N | UFGS 23 76 00.00 20 Evaporative Cooling System | Jul-2006 | D | Superseded by new unified UFGS 23 76 00 EVAPORATIVE COOLING SYSTEMS. Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| May-2020 | A | UFGS 23 80 20.00 10 Gas-Fired Heating Equipment | May-2020 | N | Superseding UFGS 23 54 16.00 10 HEATING SYSTEM; GAS-FIRED HEATERS without revision to comply with MF 2011 in response to CCR 2032. Nontechnical number and title change. | |
| May-2018 | A | UFGS 23 81 00 Decentralized Unitary HVAC Equipment | May-2018 | N | Superseding UFGS 23 82 02.00 10 UNITARY HEATING AND COOLING EQUIPMENT. Complete review and update including section number and title changes. | |
| Feb-2021 | A | UFGS 23 81 00 Decentralized Unitary HVAC Equipment | May-2018 | C | 1 | Deleted contents of paragraph 2.3.4 and added note. |
| Aug-2017 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Nov-2009 | C | 3 | Changed Material Safety Data Sheets (MSDS) to Safety Data Sheets (SDS). |
| Nov-2009 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Nov-2009 | R | Removed paragraph 1.2 regarding Y2K; Section References (SRF) update | |
| Nov-2013 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Nov-2009 | C | 1 | Revised subparts 2.2.1, 2.2.2, 2.3, 2.4, 2.4.1, 2.4.2, 2.5.1, 2.5.3, 2.8 and 3.2.4 |
| Aug-2015 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Nov-2009 | C | 2 | UFGS sustainability/energy updates to comply with Navy and DoD policies to enforce requirements of UFC 1-200-02 "High Performance and Sustainable Building Requirements". |
| Aug-2018 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Nov-2009 | C | 4 | Sustainability updates required to coordinate with the Federal Codes and DoD policies and procedures. |
| Jul-2006 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Jul-2006 | R | Added sustainable design requirements | |
| Nov-2019 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Nov-2009 | C | 5 | Incorporated dispersal of criteria from the retired UFC 3-440-05N TROPICAL ENGINEERING, and the addition of corrosion protection criteria to coordinate with UFC 1-200-01 DoD BUILDING CODE. |
| Aug-2020 | N | UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | Nov-2009 | D | Superseded by UFGS 23 81 00 DECENTRALIZED UNITARY HVAC EQUIPMENT Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Nov-2020 | N | UFGS 23 81 23 Computer Room Air Conditioning Units | Nov-2020 | N | New Unified Section; Supersedes UFGS 23 81 23.00 20 COMPUTER ROOM AIR CONDITIONING UNITS | |
| Aug-2017 | N | UFGS 23 81 23.00 20 Computer Room Air Conditioning Units | Feb-2010 | C | 2 | Changed Material Safety Data Sheets (MSDS) to Safety Data Sheets (SDS). |
| Feb-2010 | N | UFGS 23 81 23.00 20 Computer Room Air Conditioning Units | Feb-2010 | R | Section References (SRF) update | |
| Aug-2015 | N | UFGS 23 81 23.00 20 Computer Room Air Conditioning Units | Feb-2010 | C | 1 | UFGS sustainability/energy updates to comply with Navy and DoD policies to enforce requirements of UFC 1-200-02 "High Performance and Sustainable Building Requirements". |
| Aug-2018 | N | UFGS 23 81 23.00 20 Computer Room Air Conditioning Units | Feb-2010 | C | 3 | Sustainability updates required to coordinate with the Federal Codes and DoD policies and procedures. |
| Jul-2006 | N | UFGS 23 81 23.00 20 Computer Room Air Conditioning Units | Jul-2006 | R | Section revised. | |
| Nov-2020 | N | UFGS 23 81 23.00 20 Computer Room Air Conditioning Units | Feb-2010 | D | Superseded by UFGS 23 81 23 COMPUTER ROOM AIR CONDITIONING UNITS (unified). Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Jan-2007 | S | UFGS 23 81 23.00 40 Computer-Room Air-Conditioners | Jun-2006 | D | Information already provided in UFGS 23 81 23.00 20 Computer Room Air Conditioning Units Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Jun-2006 | S | UFGS 23 81 23.00 40 Computer-Room Air-Conditioners | Jun-2006 | R | Title changed from COMPUTER ROOM AIR CONDITIONING UNITS; Reference and Section References (SRF) updated | |
| Feb-2020 | N | UFGS 23 81 29 Variable Refrigerant Flow HVAC Systems | 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. | |
| Apr-2008 | S | UFGS 23 81 43.00 40 Air-Source Unitary Heat Pumps | Apr-2008 | R | Section References (SRF) update | |
| Aug-2008 | S | UFGS 23 81 43.00 40 Air-Source Unitary Heat Pumps | Apr-2008 | D | Redundant to UFGS 23 82 02.00 10 Unitary Heating and Cooling Equipment and UFGS 23 81 00.00 20 Unitary Air Conditioning Equipment | |
| Jul-2007 | S | UFGS 23 81 43.00 40 Air-Source Unitary Heat Pumps | Jul-2007 | R | Section References (SRF) update | |
| Apr-2007 | S | UFGS 23 81 43.00 40 Air-Source Unitary Heat Pumps | Apr-2007 | R | Reference Update | |
| Jun-2006 | S | UFGS 23 81 43.00 40 Air-Source Unitary Heat Pumps | Jun-2006 | R | Title changed from HEAT PUMPS; Section References (SRF) updated | |
| Jan-2007 | N | UFGS 23 81 46.00 20 Water Source Heat Pump Systems | Jul-2006 | D | Superseded by UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Jul-2006 | N | UFGS 23 81 46.00 20 Water Source Heat Pump Systems | Jul-2006 | R | Added sustainable design requirements | |
| Aug-2017 | N | UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems | Aug-2008 | C | 3 | Updated to coordinate archiving of Section 23 09 23.13 20 BACnet Direct Digital Control Systems for HVAC to meet the requirement of 10 USC 2867 to adopt a “Department wide, Open Protocol, Energy Monitoring and Utility Control System Specification” for use in military construction and military family housing activities. Changed Material Safety Data Sheets (MSDS) to Safety Data Sheets (SDS). |
| Apr-2008 | N | UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems | Apr-2008 | R | Updated throughout | |
| Feb-2013 | N | UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems | Aug-2008 | C | 1 | Modified subpart 1.6 and notes before part 1 |
| Aug-2008 | N | UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems | Aug-2008 | R | Minor revisions throughout | |
| Aug-2015 | N | UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems | Aug-2008 | C | 2 | UFGS sustainability/energy updates to comply with Navy and DoD policies to enforce requirements of UFC 1-200-02 "High Performance and Sustainable Building Requirements". |
| Aug-2018 | N | UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems | Aug-2008 | C | 4 | Sustainability updates required to coordinate with the Federal Codes and DoD policies and procedures. |
| Jan-2007 | N | UFGS 23 81 47 Water-Loop and Ground-Loop Heat Pump Systems | Jan-2007 | R | Title changed from Vertical Ground-Coupled Heat Exchange Systems; Superseding UFGS 23 81 46.00 20 Water Source Heat Pump Systems (requirements incorporated) | |
| Feb-2016 | N | UFGS 23 82 00.00 20 Terminal Heating Units | Feb-2016 | R | Revised throughout to incorporate CCRs 1734, 4179, 4406 and 4716. Title changed from TERMINAL HEATING AND COOLING UNITS. Modifications included, references, infrared heaters and electrical work. | |
| Feb-2015 | N | UFGS 23 82 00.00 20 Terminal Heating Units | Nov-2008 | C | 1 | Completion of Criteria Change Request . |
| Nov-2008 | N | UFGS 23 82 00.00 20 Terminal Heating Units | Nov-2008 | R | Section References (SRF) update | |
| Aug-2015 | N | UFGS 23 82 00.00 20 Terminal Heating Units | Nov-2008 | C | 2 | UFGS sustainability/energy updates to comply with Navy and DoD policies to enforce requirements of UFC 1-200-02 "High Performance and Sustainable Building Requirements". |
| Aug-2018 | N | UFGS 23 82 00.00 20 Terminal Heating Units | Feb-2016 | C | 1 | Sustainability updates required to coordinate with the Federal Codes and DoD policies and procedures. |
| Jan-2008 | A | UFGS 23 82 01.00 10 Warm Air Heating Systems | Jan-2008 | R | Incorporated EPAct05 requirements | |
| Apr-2008 | A | UFGS 23 82 01.00 10 Warm Air Heating Systems | Apr-2008 | R | Compliance with CSI SectionFormat | |
| Feb-2020 | A | UFGS 23 82 01.00 10 Warm Air Heating Systems | Apr-2008 | C | 1 | Updated section reference in paragraph 2.11.6 in response to CCR 5140. |
| Aug-2021 | A | UFGS 23 82 01.00 10 Warm Air Heating Systems | Apr-2008 | D | Superseded by UFGS 23 54 19 BUILDING HEATING SYSTEMS, WARM AIR. Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| May-2018 | A | UFGS 23 82 02.00 10 Unitary Heating and Cooling Equipment | Apr-2008 | D | Superseded by UFGS 23 81 00 DECENTRALIZED UNITARY HVAC EQUIPMENT. Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Jan-2008 | A | UFGS 23 82 02.00 10 Unitary Heating and Cooling Equipment | Jan-2008 | R | Incorporated EPAct05 requirements | |
| Apr-2008 | A | UFGS 23 82 02.00 10 Unitary Heating and Cooling Equipment | Apr-2008 | R | Compliance with CSI SectionFormat | |
| Oct-2007 | A | UFGS 23 82 02.00 10 Unitary Heating and Cooling Equipment | Oct-2007 | R | Revised in response to CCR's 1591, 1592 and 1593 | |
| Aug-2010 | S | UFGS 23 82 16 Air Coils | Aug-2010 | R | Added "Note" below Part 1 General; submittal article compliance; revised subpart 1.3 and 1.4; other minor revisions throughout | |
| Aug-2008 | S | UFGS 23 82 16 Air Coils | Aug-2008 | N | Renumbered; Superseding UFGS 23 82 16.00 40 with same title; Minor Edits | |
| Feb-2011 | S | UFGS 23 82 16 Air Coils | Aug-2010 | D | NASA reclassified this as fifth level; Renumbered/ Superseded by UFGS 23 82 16.00 40 with same title Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| May-2016 | S | UFGS 23 82 16.00 40 Air Coils | May-2016 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Aug-2008 | S | UFGS 23 82 16.00 40 Air Coils | Jul-2007 | D | Renumbered/ Superseded by UFGS 26 82 16 with same title | |
| May-2013 | S | UFGS 23 82 16.00 40 Air Coils | May-2013 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Feb-2011 | S | UFGS 23 82 16.00 40 Air Coils | Feb-2011 | N | Renumbered to NASA fifth level; Superseding UFGS 23 82 16 with no title change | |
| Jul-2007 | S | UFGS 23 82 16.00 40 Air Coils | Jul-2007 | R | Reference Update | |
| Jun-2006 | S | UFGS 23 82 16.00 40 Air Coils | Jun-2006 | R | Section References (SRF) updated | |
| Aug-2022 | S | UFGS 23 82 16.00 40 Air Coils | Aug-2022 | R | Update technical requirements, references and format. | |
| Aug-2010 | S | UFGS 23 82 19 Fan Coil Units | Aug-2010 | R | Submittal article compliance; other minor revisions throughout | |
| Aug-2008 | S | UFGS 23 82 19 Fan Coil Units | Aug-2008 | N | Renumbered; Superseding UFGS 23 82 19.00 40 with same title; Minor Edits | |
| Feb-2011 | S | UFGS 23 82 19 Fan Coil Units | Aug-2010 | D | NASA reclassified this as fifth level; Renumbered/ Superseded by UFGS 23 82 19.00 40 with same title Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| May-2017 | S | UFGS 23 82 19.00 40 Fan Coil Units | May-2017 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Apr-2008 | S | UFGS 23 82 19.00 40 Fan Coil Units | Apr-2008 | R | Section References (SRF) update | |
| May-2014 | S | UFGS 23 82 19.00 40 Fan Coil Units | May-2014 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Aug-2008 | S | UFGS 23 82 19.00 40 Fan Coil Units | Apr-2008 | D | Renumbered/ Superseded by UFGS 23 82 19 with same title | |
| Feb-2011 | S | UFGS 23 82 19.00 40 Fan Coil Units | Feb-2011 | N | Renumbered to NASA fifth level; Superseding UFGS 23 82 19 with no title change | |
| Jul-2007 | S | UFGS 23 82 19.00 40 Fan Coil Units | Jul-2007 | R | Reference Update | |
| Apr-2007 | S | UFGS 23 82 19.00 40 Fan Coil Units | Apr-2007 | R | Reference Update | |
| Jun-2006 | S | UFGS 23 82 19.00 40 Fan Coil Units | Jun-2006 | R | Title changed from FAN-COIL UNITS; Reference and Section References (SRF) updated | |
| Nov-2008 | S | UFGS 23 82 23 Unit Ventilators | Nov-2008 | R | Section References (SRF) update | |
| Feb-2011 | S | UFGS 23 82 23 Unit Ventilators | Nov-2008 | D | NASA reclassified this as fifth level; Renumbered/ Superseded by UFGS 23 82 23.00 40 with same title Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Aug-2008 | S | UFGS 23 82 23 Unit Ventilators | Aug-2008 | N | Renumbered; Superseding UFGS 23 82 23.00 40 with same title; Minor Edits | |
| May-2017 | S | UFGS 23 82 23.00 40 Unit Ventilators | May-2017 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Apr-2008 | S | UFGS 23 82 23.00 40 Unit Ventilators | Apr-2008 | R | Section References (SRF) update |
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