Calculated baseline
Savings compare dashboard-reported use with its predicted consumption at standard fan power over occupied operating hours. The figures are not an independently verified before-and-after measurement study.
Anonymised case study · Retail building
AHU fan energy savings.
Four units. One clear view.
Antler’s BEMS bureau dashboard reported around 60% less fan electricity use across four air-handling units than its calculated baseline.
AHU fan electricity only · Cumulative dashboard record
By Antler Management Systems · Published
60%less fan electricity
against the calculated baseline
against the calculated baseline
Based on the combined energy figures for four units. This is a fan-electricity result, rather than a whole-building energy figure.
155,990 kWhReported fan electricity saved
£37,438Reported cumulative saving at £0.24/kWh
60,190 hoursReported combined fan running hours saved
The installation
A clear view of ventilation energy.
The anonymised installation brought four air-handling units into Antler’s Building Energy Management Systems (BEMS) bureau reporting. The dashboard displayed fan operation, running hours, reported electricity use and savings for each unit, together with an overall summary.
Comparing the units individually makes it easier to understand how each contributes to the overall result. Client and location details have been withheld.
The reported result
Less fan electricity.
A visible difference.
Across the recorded monitoring period, the dashboard reported 103,272 kWh of fan electricity use against a calculated baseline of 259,262 kWh. The reported saving was 155,990 kWh, equivalent to approximately 60% of that baseline.
Calculated baseline259,262 kWh
Dashboard-reported use103,272 kWh
155,990 kWh reported saving
Annualised estimate
£15,425 per yearThe source dashboard also reported this annualised cost saving at £0.24/kWh. It is an estimate reported by the system, rather than a verified saving for a completed calendar year.
The four units
Each unit contributes.
The dashboard reported individual energy reductions ranging from 52% to 70% against each unit’s calculated baseline.
| Unit | Reported energy saving | Reported reduction |
|---|---|---|
| Unit A | 38,120 kWh | 52% |
| Unit B | 40,538 kWh | 56% |
| Unit C | 39,324 kWh | 66% |
| Unit D | 38,007 kWh | 70% |
Percentages are the rounded values displayed by the dashboard. Unit figures form the overall total; they are not additional savings. Rounding can produce small differences when displayed values are added.
Understanding the figures
A defined comparison.
A practical result.
Cumulative and annualised
The energy, cost and running-hour totals cover the cumulative record shown by the dashboard. A monitoring start date is not supplied, so no fixed duration is claimed. Combined fan hours add together time across all four units.
Estimated associated emissions
The reported electricity saving equates to approximately 36.35 tonnes CO₂e using the source dashboard’s factor of 0.233 kg CO₂e/kWh. This is a factor-based estimate, rather than a measurement of emissions or a claim using a current grid factor.
Scope of the result
The record covers AHU fan electricity. It does not establish whole-building energy savings, heating or cooling savings, or changes in occupant comfort. Results at another building depend on its plant, operating requirements and control strategy.
Understand your building’s energy use.
Talk to Antler about BEMS monitoring and the information your team needs to identify opportunities for better building control.