Case Study

The Minto Group - Multiple Locations

Ottawa & Toronto, Canada
AVERAGE ENERGY SAVING

77,277 M3

CO2 SAVING

147,000 kg CO2e

The performance of EndoTherm was piloted by The Minto Group in 3 locations over a full heating season. The Minto Group is a fully integrated real estate company offering new homes and condos, apartment rentals, furnished suites, and commercial space.

Three multi-unit residential buildings were chosen for the analysis. These included:

Castlehill (Ottawa): – Castlehill is heated by 4 boilers (1950MBH x 2, 1000MBH & 1050MBH).
Heating is provided by hydronic baseboard heaters.
Huron (Ottawa): – Huron is heated by 5 boilers (1900MBH x 2, 700MBH, 1500MBH & 1950MBH).
Heating is provided by hydronic baseboard heaters.
740 York Mills (Toronto): – 740YM is heated by 2 x 2000MBH boilers.
Heating is provided by hydronic baseboard radiators.
An identical building, 750 York Mills: – Identified and used as a control to compare consumption during the post-install pilot period.

The standard methodology for an EndoTherm pilot project takes guidance from the International Protocol for the Measurement & Verification of Performance (IPMVP) Option C which uses total natural gas consumption.

A proportion of the total consumption of each building will be the domestic hot water (DHW) load. This will be calculated and removed from the final effciency savings. Natural gas consumption is normalised for variances in outside temperature using Heating Degree Days (HDD) from a nearby weather station in Ottawa or Toronto.

A regression line is calculated from the historical consumption normalised against Heating Degree Days for the same period. The calculated trendline (in the form y=mx+c) from this baseline can be used to predicted consumption for any know HDD value value during the pilot period. The y-intercept of this trendline will be identified as the baseload for each site.

This predicted value can be compared with the actual recorded value from billing data to determine a change in demand caused by the ECM. A CuSum analysis of each months change can be used to determine the total efficiency improvement over the 6 month pilot period.

It is noted that the COVID-19 pandemic has had a significant impact on occupancy and thus demand of many buildings. Thus the 4th site (750 York Mills) will be used as a comparison to 740 York Mills. These systems are side by side and have identical boiler systems.

Results

Location Pilot Length Saving (M3) Saving (%) HVAC Saving (%)
740 YM 6 months 20,470.3 8.50% 12.20%
750 YM – CONTROL SITE 6 months 4,725.9 2.20% 2.67%
Difference 15,744.4 6.30% 9.54%
CASTLEHILL 6 months 12,510.2 7.98% 8.47%
HURON 6 months 49,021.3 14.11% 15.31%

 

Savings

Total Energy Saving:

77,277 M3

Average Energy Saving:

11.11%

Total CO2e Saving:

147,000kg CO2e

 

Carbon Reduction Equivalents:

 

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