A.5.1.2 archetype divisions – Retrotec USACE User Manual
Page 121
Appendix A A7
A.5.1 Example 1: Small Building Portfolio
A.5.1.1 Portfolio Defi nition
A sample set of buildings will be used in this example. Data was collected on
101 offi ce buildings located within Canada. Included in the data collection was
information on the following:
Total fl oor area
■
Age of construction
■
Fuel source used
■
Energy use intensity (MJ/m
■
2
.yr)
A.5.1.2 Archetype Divisions
For this example, the following archetypes were used:
Age:
pre-1950, 1950–1975, post-1975
Size (total): less than 1,000 m
2
, 1,000–5,000 m
2
, and greater than 5,000 m
2
Fuel type:
natural gas, oil
The fi rst archetype strategy is to separate the buildings heated by natu-
ral gas from those heated by fuel oil by focusing on the natural gas buildings
only.
The information presented in Table A1 illustrates how the use of arche-
types can simplify the analysis. Including the energy use intensity (EUI), or
energy consumed per m
2
, allows for an understanding of which archetypes
deserve further examination.
The average EUI for all buildings in this portfolio was found to be 584
(MJ/m
2
.yr) for electrical consumption and 685 (MJ/m
2
.yr) for natural gas
consumption.
TABLE A1. NATURAL GAS BUILDINGS.
Archetype
No. of
Buildings
Average
EUI Elec.
(MJ/m
2
.yr)
Average
EUI Gas
(MJ/m
2
.yr)
Pre-1960 + < 1,000 m
2
2
276
760
Pre-1960 + 1,000–5,000 m
2
10
798
858
Pre-1960 + > 5,000 m
2
15
738
552
1950–1975 + < 1,000 m
2
4
682
1480
1950–1975 + 1,000–5,000 m
2
30
436
655
1950–1975 + > 5,000 m
2
72
559
536
Post-1975 + < 1,000 m
2
4
587
872
Post-1975 + 1,000–5,000 m
2
3
493
670
Post-1975 + > 5,000 m
2
10
713
721
Total
150
584
685