DEPARTMENT OF THE ARMY ER 1110-1-8173
U.S. Army Corps of Engineers
CECW-EC Washington, D.C. 20314-1000
Regulation
No. 1110-1-8173 30 December 2017
Engineering and Design
ENERGY MODELING AND LIFE CYCLE COST ANALYSIS
1. Purpose. The purpose of this Engineering Regulation (ER) is to provide direction and
guidance for the application of energy modeling and Life Cycle Cost Analysis (LCCA) in design
decisions and alternative analyses for buildings and structures. This ER is effective when issued.
2. Applicability. All projects and programs when USACE is the design agent and the vertical
construction project includes over 5,000 gross square feet of interior space and the construction
cost is greater than $3 million. Compliance with this ER will ensure energy modeling and
LCCA activities for energy conservation alternatives are being performed and documented to
comply with legislative mandates referenced by Unified Facilities Criteria 1-200-02, High
Performance and Sustainable Building Requirements (Ref. d). Projects that do not meet these
thresholds are not required to follow this ER. However, it may be beneficial to consider
applying the methodology described below to make informed decisions.
3. Distribution Statement. Approved for public release; distribution is unlimited.
4. References.
a. Energy Policy Act of 2005 (EPAct 05), 8 Aug 2005,
https://www.gpo.gov/fdsys/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf
b. Executive Order (EO) 13693, Planning for Federal Sustainability in the Next Decade, 19
Mar 2015, https://www.gpo.gov/fdsys/pkg/FR-2015-03-25/pdf/2015-07016.pdf
c. CFR Title 10 Part 436, Subpart A and National Institute of Standards and Technology
(NIST) Handbook 135, “Life-Cycle Costing Manual for the Federal Energy Management
Program, Annual Supplement to NIST Handbook 135,”
http://fire.nist.gov/bfrlpubs/build96/PDF/b96121.pdf
d. Unified Facilities Criteria 1-200-02, subject: High Performance and Sustainable Building
Requirements, http://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc/ufc-1-200-02
e. Unified Facilities Criteria 3-401-01, subject: Mechanical Engineering,
http://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc/ufc-3-401-01
f. Unified Facilities Criteria 3-410-01, subject: Heating, Ventilating, and Air Conditioning
