Practitioner reference band. Owner-operator voice. Built for the AI-HVAC procurement review you have to defend.
The AI-HVAC procurement category has a single-tier numbers problem. Almost every vendor pitch in 2026 cites a savings range — 15-25%, 20-35%, "up to 50%" — and almost none of them disclose which tier of the deployment lifecycle the number applies to. The result is a procurement-review failure that is not a vendor fault and not an owner fault: it is a category convention gap. This page closes it.
Below is the three-tier reference band an operator can defend in any board, CFO, or facilities-committee review. Each tier is anchored to public IPMVP Option C disclosures or DOE Commercial Building HVAC Technology Challenge guidance. None of it is vendor self-report.
BLUF — The Three Tiers You Should Be Quoting
When an AI-HVAC vendor cites a savings number, the legitimate question is not "is the number real?" but "which tier is this?" The honest answer is one of three:
- Tier 1 — Year-1 Ramp (10-15%): What the system delivers in months 1-12 while baseline regressions stabilize, non-routine adjustments accumulate, and the operator's setpoint discipline catches up to what the model is actually optimizing. This is the number to put in your CapEx ROI calculator.
- Tier 2 — Steady-State (20-35%): What the system delivers in years 2-5 after the baseline is stable, the NRA workflow is documented, and the building's occupancy + weather signatures are fully captured. This is the number that goes in your 5-year operating plan, not the year-one budget.
- Tier 3 — Next-Gen Aspirational (≤50%): What the DOE Commercial Building HVAC Technology Challenge has documented in tightly instrumented test buildings using next-generation algorithms, refrigerants, and hybrid HVAC-electrification architectures. This is not a procurement number. It is a research ceiling.
If a vendor cites a single number without disclosing the tier, the rest of the proposal should be read with skepticism. If a vendor refuses to commit to a Tier-1 floor, the procurement-review fail is on the vendor, not the math.
The Reference Band Table
Use this table verbatim in your next AI-HVAC procurement review. Each row is a published disclosure or standards-anchored number. None of it is hand-waving.
| Tier | Range | Anchored On | When To Cite It |
|---|---|---|---|
| Tier 1 — Year-1 Ramp | 10-15% | JCI-Nantum Apr 27 2026 customer disclosure (IPMVP Option C, multi-site; first 12-month performance band) | Year-1 CapEx ROI; payback calculator; first-year SLA floor |
| Tier 2 — Steady-State | 20-35% | JHU Reimagine 9K (IPMVP Option C, year 2+); Goldman Sachs 2024 portfolio retrofit disclosure; Trane Mosaic / BrainBox 36-month operator reports | 5-year operating plan; lifecycle NPV; renewal-baseline SLA |
| Tier 3 — Next-Gen Ceiling | ≤50% (research) | DOE Commercial Building HVAC Technology Challenge documented prototypes (next-gen refrigerants + electrification + AI control) | Innovation roadmap framing; R&D briefings; never a contractual number |
Why The Single-Number Habit Fails Procurement Review
Three failure modes are visible in every CRE AI-HVAC procurement review we have seen over the last 18 months:
1. Ramp-vs-Steady-State conflation
Vendor cites "25-30% verified savings" without specifying that the number is from a Year-3 disclosure. The CFO discounts the number against Year-1 cash flow and concludes the project does not pencil. The project is killed. The number was correct; the tier was missing.
2. CapEx ROI built on Tier 2 numbers
Procurement team builds the business case on the steady-state band (20-35%) and the system underperforms in Year 1 (because Year 1 is supposed to be 10-15%). The CFO loses confidence. The board pulls the program. The number was correct; the tier was wrong for the calculation.
3. Tier-3 numbers cited as Tier-2 commitments
Vendor cites "up to 50%" in an opening pitch. Procurement team takes 50% as the upper-bound steady-state number. Three years later, the verified IPMVP Option C result is 24%. The vendor is sued or churned. The number was a research ceiling, never a procurement commitment.
The Procurement Crib — Five Questions To Ask Before Signing
- Which IPMVP Option are you committing to (A, B, C, or D)? Option C (whole-facility) is the credible default for AI-HVAC. Option D (calibrated simulation) is acceptable with full disclosure. Anything else needs a methodology explanation.
- What is your Year-1 floor commitment? A vendor unwilling to commit to a Tier-1 (10-15%) floor for Year 1 is asking you to bear ramp risk. That is a contract-structure problem, not a technology problem.
- What CV(RMSE) and NMBE did your reference disclosures hit? Without these numbers (see our companion M&V acceptance window page), the savings number is statistically undefended.
- What is your NRA workflow? Non-Routine Adjustments will happen — occupancy shifts, weather extremes, schedule changes. A vendor saying "fully automated M&V" without a documented human-judgment NRA workflow is overstating what IPMVP allows.
- Which tier should I put in my CapEx model? The right answer is Tier 1 for Year 1, Tier 2 for steady-state, and never Tier 3 in any contract document. A vendor who answers differently is selling you a research result as a procurement commitment.
How This Connects To The Rest Of The Stack
The two-tier reference band only holds up if the underlying M&V is rigorous. The companion pages on this site cover the upstream and downstream disciplines:
- The IPMVP verification framework — what Option C requires before any savings number is defensible.
- The M&V acceptance window — the CV(RMSE) and NMBE floors that separate real verification from decorative math.
- Cloud, hardware, or edge — three AI-HVAC architectures — how the architecture choice changes which tier is realistic.
- /enterprise/ — how owner-operators structure procurement contracts to anchor on Tier 1 in Year 1 and Tier 2 in years 2-5.
The One-Sentence Procurement Test
A vendor who can quote you three numbers — one Tier-1 floor for Year 1, one Tier-2 band for steady-state, and one IPMVP Option commitment — is a vendor who has thought about your procurement review. A vendor who cannot is asking you to take the ramp risk for them.
If you want to walk through your current pilot or RFP against this reference band, ask the Agent Door. The conversation runs against the same standards (IPMVP, ASHRAE Guideline 14, DOE M&V Guide v4.0) your auditor will use a year from now.
Sources: JCI-Nantum customer disclosure (2026-04-27), Trane DOE Commercial Building HVAC Technology Challenge, JHU Reimagine 9K (IPMVP Option C), Goldman Sachs 2024 portfolio retrofit disclosure, EVO IPMVP Core Concepts (Volume I-IV, 2022 edition), DOE FEMP M&V Guidelines v4.0.
Analysis grade: BENCHMARK. Methodology: Three-tier reference band derived from public IPMVP Option C disclosures and DOE Commercial Building HVAC Technology Challenge documentation. Tier assignments cross-referenced against three independent operator IPMVP reports (one APAC, two North American). No vendor self-report numbers used in band construction.