Case Study

Boiler Replacement Leads to Savings

Case Study: A Medical Center Boiler Replacement
Location: Michigan

The Problem

In 2016, the boilers at a Medical Center in Northern Michigan were replaced. Natural gas consumption information was provided for 2015 and 2017. Synergy’s Facility Engineering Service Team issued a report created to compare the heating performance before and after boiler replacement.

The Plan

The cost savings of the new boilers was determined by comparing gas consumption (CCF) to the heating degree days (HDD) of that month. A heating degree day shows the number of degrees a day’s average temperature is below a fixed temperature balance point and is used to predict the environmental heating load for an amount of time. In this analysis, a balance set point of 60°F was used. Figure 1 shows the heating degree days per month for year 2015 and 2017. For 2015 and 2017, the total HDD was 7,374 and 6,599, respectively. The CCF for each month is shown in Figure 2.

Boiler replacement heating degree days comparison. Energy efficiency.


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