Pelorus Engineering
Menu
LearnFault libraryReadiness quizWhat your data unlocksGet your dataGlossarySee Energy Agent
AHU-X05 · Air-side AHU

Equipment running outside its occupancy schedule

A channel is showing active output during hours the building schedule says it should be off.

Physics-basedBAS trendsLow effortNeeds schedule

What does AHU-X05 mean?

A channel is showing active output during hours the building schedule says it should be off.

Why does it matter?

After-hours operation is a top driver of unexpected baseload. Even a small fraction of the year running 24/7 instead of 12/5 can add 15–25% to annual kWh.

What should you do?

Check the override status on the BMS, occupancy sensors that may be falsely triggering, manual after-hours requests, and tenant override panels that never time out.

How Energy Agent prices a finding

Written by Pelorus Engineering · Brent Waluzak, P.E. (FL), President, Pelorus EngineeringLast updated
Estimate it

What is after-hours operation costing?

Estimate the energy paid for while the building should be off.

Demand above the normal overnight floor.
Enter a repair or controls-change cost to see the simple payback.
Avoidable cost per year—Energy —Simple payback Enter a cost to fix to see the payback.

    Excess load above the night-time floor, times the hours it persists each week, times your rate. Energy Agent measures both the excess and the hours from the meter.

    Screening estimate. Energy Agent measures the real fault hours and load from your trends and prices them at your tariff.

    Request a demoSee how Energy Agent prices a finding

    Screening-level estimates; confirm with measurement and verification before capital commitment.

    More air-side ahu faults

    All 32 air-side ahu rules →

    See these rules run on your building.

    Send twelve months of interval data and a BAS trend export. Energy Agent returns a ranked list of what is wasting money, what each item is worth per year at your tariff, and what to do about it.

    Request a demoBenchmark your building