UFC 3 -520-01
June 10, 2002
Existing Facilities .
2-10.3.1 Existing facilities should incorporate energy-saving design features into all
facility upgrades. Some modifications, such as lighting or ASD installations, can be
justified solely on the basis of energy savings.
2-10.3.2 Perform an energy audit to evaluate energy efficiency savings opportunities in
the electrical system. The primary purpose of an energy audit is to identify energy
conservation and cost savings opportunities among "energy-using" systems such as
lighting fixtures, and heating, ventilation and air conditioning ( HVAC) equipment. The
goal of the energy audit is to evaluate the overall efficiency of building energy systems
as well as the efficiency of individual components within those energy systems.
2-10.3.3 Although many buildings have been improved over the years by retrofits,
most old buildings still offer greater energy-saving and cost -saving opportunities.
Retrofitting entire older energy systems can be an attractive investment because the
simple payback for many of these projects is less than two years. However, the initial
capital outlay is often substantial and might require the entire building to be vacated for
some period of time.
2-10.3.4 An energy aud it should also determine the performance and efficiency of
each individual component of an electrical system. Although the components of many
electrical systems have been replaced since they were first installed, many are still not
energy efficient by today's standards. With advances in technology, more energy-
efficient replacement components are available today. Many of those components can
be replaced relatively easily and numerous no -cost or low-cost opportunities can be
identified through a productive energy audit program. For example, high-efficiency
fluorescent lights with electronic ballasts can replace older fluorescent or incandescent
lights without major modifications.
2-10.3.5 As part of the energy audit process, follow up on completed energy
conservation projects to determine if the expected savings have been achieved. This
type of audit is important for shared energy savings contracts (or other performance
contracting). The AFCESA Energy Measurement and Verification Handbook provides
guidance regarding measurement and verification.
Energy Efficiency Design Opportunities in the Electrical System.
2-10.4.1 Consider the energy savings options listed in Table 2 -1.