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A.5.1.2 archetype divisions – Retrotec USACE User Manual

Page 121

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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