Reducing hidden electric heating consumption
Renergia analysed an office building where electricity use was higher than expected. The goal was to understand where the unnecessary consumption came from and what actions could reduce it.
Context
The building already had energy data available, but the source of the unnecessary consumption was not clear from the total consumption alone.
Renergia reviewed the monitored data across the cold season and focused on three electric thermal loads:
Hallway electric radiators
Analysed period:
08 January – 31 March 2026
Electric water boilers
Analysed period:
02 February – 31 March 2026
Central electric heating unit
Analysed period:
21 February – 08 March 2026
What Renergia found
Several systems were running continuously or almost continuously, including outside the useful operating schedule.
This created avoidable energy costs, especially during off-hours, nights, and periods when the building did not need the same level of electric heating.
What we did
Renergia identified the systems responsible for the waste and recommended practical corrective actions.
Radiators
Introduced a clearer operating procedure.
Boilers
Added automation to reduce unnecessary operation.
Heating unit
Installed thermostat control to reduce continuous heating.
Before vs. after
Average off-hours consumption decreased after the actions were applied.
Hallway radiators
−66.3%Electric boilers
−96.3%Central heating unit
−54.7%What we achieved
The building reduced unnecessary electric thermal consumption and lowered imported energy costs.
Why it matters
Renergia did not only show that the building was consuming too much electricity. It helped identify where the waste came from, what actions were needed, and how much impact those actions created.
The result was a clearer path from energy data to operational decisions, lower costs, and better building performance.