Three of the thirteen Canadian firms we reviewed list retro-commissioning as a service. Not one explains it, and not one mentions that IESO funds the investigation phase at up to $50,000 — or that programme incentives require an accredited provider from IESO’s qualified list. A facilities manager searching for this finds three list items and no information.
Existing building commissioning — EBCx, also called retro-commissioning — is a systematic investigation of whether the systems a building already has are operating as they were designed to. Not whether to replace them. Whether they work.
The answer, in most buildings over about fifteen years old, is partly no. Setpoints have drifted. Schedules were overridden during a complaint three winters ago and never restored. Economizers are stuck. Valves leak. Zones fight each other, and the plant runs harder to satisfy both. None of that shows up as a fault on a screen, and all of it shows up on the bill.
Commissioning corrects what you own before you buy anything. The measures are overwhelmingly settings, sequences, schedules, balancing and minor repairs, so the payback is typically far faster than a capital retrofit — and a plant that has been corrected is also the right baseline for sizing any equipment you replace afterwards. Doing it the other way round means buying equipment sized for a building that was misbehaving.
| Phase | Incentive | Cap |
|---|---|---|
| Investigation | Up to $0.06 per sq ft of building area, or 75% of participant costs to the commissioning provider | $50,000 |
| Implementation | $0.03/kWh of confirmed savings | 30% of annual electricity consumption or $50,000, whichever is lower |
| Persistence (12-month monitoring) | $0.03/kWh of persisting savings | Same cap as implementation |
Verified 3 October 2026 against IESO's Existing Building Commissioning Program page. Programme contact: [email protected].
On a 300,000 square foot building, the investigation phase alone is worth up to $18,000 at $0.06 per square foot; at 833,000 square feet it reaches the $50,000 cap. That is a funded investigation into a building you already own, before a single piece of equipment is bought.
| Requirement | Detail |
|---|---|
| Annual electricity consumption | Minimum 750,000 kWh, excluding industrial and manufacturing process load |
| Energy data | At least twelve consecutive months |
| Baseline models | Must meet the programme's minimum standards |
| Commissioning history | No commissioning exercise in the previous two years |
| Connection | IESO-controlled grid or a distribution system |
| Provider | An accredited building commissioning provider from the programme's qualified provider list |
Programme-incentivized EBCx requires an accredited commissioning provider drawn from IESO's qualified provider list. No competitor site we reviewed mentions this at all, which means an owner can get a long way into a conversation before discovering the firm cannot deliver the funded route.
So ask it first, of everyone including us: "Are you on IESO's qualified provider list for the EBCx programme?" We will answer in writing before you build a schedule around it, and where the answer means the funded route needs an accredited provider on the team, we will say so rather than discovering it at application.
EBCx pays a third time for savings that are still there after twelve months, and that is not generosity: drifted settings drift back. The persistence phase requires monitoring, which requires a measurement and verification plan established at the start rather than invented at the end. See measurement and verification.
New building commissioning confirms the systems worked on handover. EBCx asks whether they still do, which after a decade of occupancy, tenant changes and complaint-driven overrides is a different question. Note too that the programme requires no commissioning exercise in the previous two years, so recent work can affect eligibility.
Not through this programme. Commissioning still pays for itself in many smaller buildings on its own merits, and gas-side measures may be fundable through Enbridge. Tell us your kWh and m³ and we will tell you what is actually open.
Functional testing exercises equipment through its operating range, which is normally done outside occupied hours for anything occupants would notice. We plan the testing schedule with your operations team rather than around them.
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If you do not need an audit, we will say so.