Retrotec USACE - Manual (Page 123)

Appendix A A9
Within this report it was found that 136,653 buildings are owned by a com-
bination of private organizations, individuals, nonprofi t organizations, and the
federal government and can be classifi ed as commercial or industrial.
A.5.2.2 Archetype Divisions
A limitation to the data available is that a maximum of two archetypes are
available for the portfolio of buildings. Therefore, to illustrate how different
building sets can be analyzed using similar strategies, the archetypes used in
the small portfolio example will be used here (only natural gas buildings were
considered):
Age: pre-1960, 1960–1980, post-1980
Size (total): < 1,000 m 2 , 1,000–5,000 m 2 , > 5000 m 2
Using the data available in the tables, the information in Table A2 was ob-
tained.
This use of archetypes demonstrates how a large number of buildings can
be characterized by a small number of archetypes.
TABLE A2. LARGE PORTFOLIO GROUPING.
Archetype
No. of
Buildings
Average
EUI Elec.
(MJ/m 2 .yr)
Average
EUI Gas
(MJ/m 2 .yr)
Pre-1960 + < 1000 m 2 40,341 700 960
Pre-1960 + 1,000–5,000 m 2 11,904 590 750
Pre-1960 + > 5,000 m 2 2,698 730 550
1960–1980 + < 1,000 m 2 22,029 860 1000
1960–1980 + 1,000–5,000 m 2 12,979 560 730
1960–1980 + > 5,000 m 2 5070 680 680
Post-1980 + < 1,000 m 2 21,496 1010 930
Post-1980 + 1,000–5,000 m 2 14,523 640 590
Post-1980 + > 5,000 m 2 5,613 760 460
Total 136,653 740 750
A.5.2.3 Building Selection
Although the building numbers are much greater in this example, the same
strategy for the selection of those to focus on applies. By comparing the aver-
age EUI with that of each archetype, the building ages and sizes with the great-
est potential for improvement can be singled out.
For natural gas, the following archetypes are chosen:
Pre-1960 + < 1,000 m 1. 2
1960–1980 + < 1,000 m 2. 2
Post-1980 + < 1,000 m 3. 2