Retrotec USACE - Manual (Page 116)

A2 ENERGY & PROCESS ASESSMENT PROTOCOL
Method(s) for determining the energy consumption of the buildings 4.
List of energy conservation measures for the building archetypes 5.
Approach for screening the cost effectiveness of the ECM(s) for the 6.
building portfolio
Establishing goals, objectives, and scope are necessary for analyzing a port-
folio of buildings and for effectively selecting buildings with the greatest po-
tential for improving their energy usage and for optimizing the ECM selection
process. To achieve this, it is necessary to categorize buildings with similar
properties and characteristics into categories that can represent a number of
buildings in the portfolio. A portfolio analysis requires the following informa-
tion:
Number of buildings ■
Floor area, total volume ■
Types of buildings, current occupancy, and schedule of operation ■
Ages of buildings ■
Locations of buildings ■
Building energy usage or total energy used ■
Automation system ■
Types of energy used (natural gas, oil, electricity, etc.) ■
Central or distributed heating/cooling plants ■
Type of HVAC, boilers and distribution system ■
A.2.1 Metric for Differentiating or Grouping the Different Type of
Buildings Referred to as Archetype
“Archetype” is a generic word used to defi ne a typical building type (the Facility
Energy Decision System [FEDS] calls them “building sets”) that might occur
in your portfolio. Among the most used archetypes are bungalows, walk-up
apartment buildings, row houses, small offi ce buildings, high-rise offi ce build-
ings, prisons, and school buildings. Archetypes share characteristics such as
number of stories, heating/cooling equipment, roof types, occupancy, and so
forth.
Archetypes often need to be dated—the small offi ce building dating from
the 1940s may be quite distinct from current designs. The choice of the type
and number of archetypes depends on the portfolio under examination. The
number should be small enough to be manageable and large enough to ad-
equately represent the variety of buildings found in the portfolio.
Single-category archetypes use one defi ning variable value to group dif-
ferent building types and typically include age, size, location, or schedules.