Case Study

Maple Ridge School District - Multiple Locations

British Columbia, Canada

$5,765.76 (CAD)


34,000 kg CO2e

The performance of EndoTherm was piloted by Maple Ridge School District in three schools;
Golden Ears Elementary Highland Park Elementary and Albion Elementary.

All sites were selected due to their stable boilers systems with no recent baseline changes other than COVID operational changes. EndoTherm was installed in February 2021. Results from Albion Elementary were removed from the final analysis due to unforeseen operational changes during the pilot period which altered the sites energy consumption trendline.

The analysis methodology takes guidance from IPMVP (Option C) looking at natural gas bills. Space heating is the dominant load for each of these school facilities. A baseline was created using monthly billing data from July 2018 to January 2021 normalized using Heating Degree Days date from nearby Pitt Meadows Coastal Station (CWMM) at a base-load of 18.5°C.

Inspecting the baselines show notable increases in consumption from October 2020 which coincides with the school districts adoption of ASHRAE guidance to increase fresh air ventilation to minimize the risk of COVID-19. Thus the shorter post-covid baseline, reflective of the current operating conditions, was chosen for the analysis.

The chosen analysis uses the trendline from the baseline to predict gas consumption for each monthly period. This is compared to the recorded values to determine changes in system efficiency. All sites were monitored up to the end of May 2022, summer months were removed from consideration.

Figure 1: The baseline analysis at Highlands Park Elementary.

Figure 2: A comparison of pre & post consumption data normalized with Heating Degree Days at Highland Park Elementary


Site Name HVAC Saving % Energy Saving (GJ) Financial Saving ($ CAD)
Golden Ears School 12.93% 434.56 GJ $3,693.72
Highland Park School 9.95% 243.77 GJ $2,072.05



Average Saving:


Total Financial Saving:

$5,765.78 (CAD)

Total CO2e Saving:

34,000 kg CO2e


Carbon Reduction Equivalents:

‘SD42 decided to move ahead with the EndoTherm treatment at three of our elementary schools in early 2021. We were in the middle of the COVID-19 pandemic when SD42 rolled out a number of ventilation improvements in all of our schools, that ultimately resulted in a natural gas consumption spike.

Despite this, using EndoTherm in the three schools shows a reduction in our natural gas consumption that resulted in a payback within the 16 month pilot period.’

Alexandra Tudose

Manager, Energy & Environmental Sustainability, Maple Ridge School District


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