Case Study
Concert Properties & Bentall Green Oak (5 Sites) British Columbia & Ontario, Canada
| TOTAL ENERGY SAVING |
16,583.7 GJ |
| CO2 SAVING |
170,000kg CO2e |
This case study is an overview of a number of pilot projects run by Concert Properties between 2018 and 2023. This includes 3 sites run in partnership with Bentall Green Oak in Vancouver, BC.
Measurement & Verification (M&V)
The M&V will focus on 3 sets of analysis; 1190 Hornby (pre-COVID), 1130 W Pender and 1100 Melville.
Historical natural gas bills were collected for 2-3 years prior to EndoTherm dosage. Variances in baseline were identified to select a time period most suitable for comparison. This included operational / set-point changes as a result of COVID-19. Consumption data was normalized using Heating Degree Days (HDD) from Vancouver Airport (CYVR) at a base-load of 18.5°C.
From this baseline data, a trend-line (in the form y = mx + c) of the historical performance can be used to predict consumption during the post-install period. The performance of EndoTherm can be calculated as the difference between this predicted consumption and the recorded consumption from the monthly billing data.
For the three chosen trend-lines, the baselines have a strong Spearman’s Rank Correlation Coefficient above 0.95. This shows a high level of confidence that consumption is driven by external temperature and HDD should be used in the comparison methodology.
Figure 1: EndoTherm analysis at 1190 Hornby St
Figure 2: EndoTherm analysis at 1130 W Pender
Figure 3: EndoTherm analysis at 1100 Melville
RESULTS
A summary of the results can be seen in the table below:
| Site Name | Install Date | Pilot Length | Total Gas Saving | HVAC Only Saving | Energy Saving | Financial Saving |
|---|---|---|---|---|---|---|
| 1190 Hornby | Sept 2018 | 14 Months | 13.90% | 17.38% | 718.01 GJ | $7,180.09 |
| 1130 W Pender | Sept 2021 | 24 Months | 8.89% | 11.11% | 919.44 GJ | $11,492.96 |
| 1100 Melville | Sept 2021 | 24 Months | 13.77% | 17.21% | 1,275.32 GJ | $15,941.49 |
| 1140 W Pender | Sept 2022 | 12 Months | 6.41% | 8.01% | 375.94 GJ | $4,699.19 |
| One32 | Sept 2022 | 12 Months | 1.80% | 2.99% | 13,295 m3 | $1,277.50 |
ANALYSIS
The analysis for the 5 sites was carried out for the most suitable time period available. This includes:
| 1190 Hornby | Run until COVID-19 and subsequent BAS/Occupancy control changes. |
| 1130 Pender | Run for 2 years. |
| 1100 Melville | Run for 2 years. 3 Months removed between Nov 2021 and Jan 2022 due to confirmed set point change. |
| 1140 W Pender | Run for 1 year. |
| One32 | Run for 1 year. Investigation identified an increase in post-install occupancy vs the baseline which would increase space heating and DHW demand. Secondary analysis using a shorter baseline with similar occupancy shows savings above 10%. |
SAVINGS
| Energy Saving: |
11.34% |
| Financial Saving (CAD): |
$40,591 |
The pilots also saved 170,000kg of CO2e, which is equivalent to:
