UFC 3-400-01
5 July 2002
2-4
FUNCTIONAL REQUIRMENTS AND COMFORT. The mission and function
of the facility and the long term comfort, health and productivity of the occupants are
critical considerations in the planning, design and construction of any facility. Generally,
all practical and life cycle cost effective energy and water conserving features will be
included in the planning, design and construction of facilities. However, features that will
adversely impact the mission or comfort, health and productivity of the occupants shall
not be included. In addition, system selection and incorporation of energy and water
conserving features shall be closely coordinated with the facility user and maintenance
staff. Only those systems and features that can be effectively operated and maintained
will be considered.
2-5
ENERGY AND ECONOMIC ANALYSIS CALCULATION METHODS. All
analysis shall be performed based on the actual conditions expected over the life of the
facility including anticipated occupancies, scheduled hours of operation and process
loads. Realistic energy usage and efficiencies, maintenance cost and repairs and
renovations shall be included.
2-5.1
Energy Calculations. Energy calculations for new conditioned buildings or
for comparing alternative building features and energy conservation techniques or
equipment will be determined using a professionally recognized and proven computer
program or programs that integrate architectural features with air-conditioning, heating,
lighting, and other energy producing or consuming systems. These programs will be
capable of simulating the features, systems, and thermal loads used in the design. The
energy savings and any parasitic energy loads associated with the utilization of
recovered energy, solar heat, solar photovoltaic energy and other renewable or waste
heat applications shall be included. Using UFC 3-400-02, Engineering Weather Data, or
other established and authoritative weather data files, the program will perform 8760
hourly calculations. Programs that "condense" the weather files and number of
calculations into several "typical" or average days per month, follow modified bin
calculation procedures or other simplified methods described in the Chapter entitled
"Energy Estimating and Modeling Methods" of the ASHRAE Handbook of Fundamentals
may be used when the features, size or complexity of the building design and
alternatives do not demand more sophisticated energy calculations to give accurate
results and support design decisions. In addition, the Department of Energy maintains
a list of building energy and water conserving tools for design. A number of the
programs may be of benefit in performing energy and water conservation calculations,
comparing energy and water system alternatives and evaluating specific conservation
measures. The web address for additional information is
http://www.energytoolsdirectory.gov/
2-5.2
Economic Analysis. Life cycle costing shall be in accordance with Title 10
Code of Federal Regulations Part 436, Subpart A. The Life Cycle Costing in Design
(LCCID) program is in full compliance with these regulations and is periodically updated
to include the latest differential escalation rates, energy cost projections and similar
economic factors. LCCID is available from the Building Systems Laboratory at the
University of Illinois, http://www.bso.uiuc.edu, and from the Construction Criteria Base
distributed by the National Institute of Building Science. Another life cycle costing
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