The Tuesday Morning Glitch That Saved £3,400

Rob manages three commercial buildings. He’s juggling everything from maintenance to meter readings, often relying on gut feel and scattered spreadsheets.

Tuesdays were always a bit odd. Energy costs slightly higher, but he chalked it up to staff presence or meeting days. Nothing glaring enough to investigate further.

“I just assumed it was people coming in earlier, or the heating system kicking in a bit harder after the Monday lull.”

Once Rob started using Monitor Hut, he finally had half-hourly data plotted across multiple weeks, across all utilities, in one view.

On his energy dashboard, he spotted a pattern:

• Every Tuesday at 5:00am, electricity usage spiked sharply
• The building didn’t open until 7:30am
• It wasn’t just one week — it happened every Tuesday, in only one building

Rob zoomed in, tagged the event, and looked at equipment-level detail (his HVAC was sub-metered).

The culprit?
→ A legacy air handling unit set to an old auto-start program, only running Tuesdays due to a calendar glitch in the building’s BMS.

Rob asked the on-site contractor to update the BMS schedule — a 2-minute job once identified. He also set up an alert in Monitor Hut, just in case anything similar started happening again.

Rob’s ‘wins’, in his own words:

• Annual savings: £3,400
• Cut unnecessary CO₂ emissions by 1.6 tonnes
• Used it as a win with senior leadership — got budget approved for two other quick wins

“The tech made it obvious. It’s not that I didn’t care before. I just didn’t have time to spot things like this. Now I do.”

Small anomalies like this often go unnoticed, and they add up. Monitor Hut helps you see what’s really happening, so you can fix problems before they become patterns.