Energy savings performance contracts for HVAC, lighting, and controls upgrades

Reference article · 5 min read

Most states have enabling legislation that lets public agencies buy energy and water conservation improvements through a performance contract instead of a conventional low bid construction award. It is called an energy savings performance contract, an ESPC, or a guaranteed energy savings contract. One firm, usually an energy services company, audits your facilities, designs and installs a package of measures, and guarantees in writing that the resulting reductions in energy, water, and certain operating costs will meet a stated amount each year. If savings fall short, the contractor pays the difference. Financing is typically a tax exempt lease purchase or a bond, repaid over the term out of the savings stream.

For HVAC, lighting, and controls work the appeal is specific: the route lets an agency address deferred maintenance without a large capital appropriation and moves some performance risk onto the contractor. It also has fewer competitive checkpoints than your normal process, because the firm that tells you what you need is the firm that sells it to you. State statutes generally require qualifications based selection, a written guarantee, and periodic verification, but the details vary and change. Confirm current rules with your procurement counsel and state energy office before issuing anything.

How the transaction is structured

• Selection. Most enabling statutes allow selection on qualifications rather than sealed price bids, so you choose the partner before scope or price exists.
• Investment grade audit. A paid engineering study defining each measure, its installed cost, and its projected savings.
• Energy services agreement. The construction contract plus the guarantee and the verification obligation.
• Financing. A separate instrument. Your agency is the obligor, and payment does not pause if equipment underperforms.
• Performance period. Annual reporting and reconciliation across a term that many states cap by statute.

Treat the investment grade audit as the decision point

The audit sets the scope, the baseline, and the savings math everything else rests on. Contract for it separately. Require that the finished audit, including calculations, assumptions, and meter data, be your property whether or not you proceed to construction. Require measure level cost and savings detail so you can decline individual measures rather than accept a bundle, which is how short payback lighting work ends up subsidizing mechanical work that would not stand on its own.

Have the audit reviewed by an engineer with no interest in the project, through a state energy office program or your own owner's representative. The reviewer should test the baseline, the assumed operating hours, the utility rate escalation assumption, and whether each claimed saving is measurable or merely stipulated.

What the guarantee actually covers

Read the guarantee for what it excludes.

• Stipulated versus measured savings. Stipulated values are agreed in advance and never verified. The more of the guarantee that rests on stipulations, the less it means.
• Non energy savings. Avoided maintenance labor and avoided future capital replacement are the softest numbers in the package.
• Escalation. Projections often assume annual utility rate increases. A high assumed escalator makes a weak project look sound.
• Reconciliation. Determine whether surplus savings in one year offset a shortfall in another, and whether shortfalls are paid in cash or as credit.
• Operational change. If you extend building hours, add server rooms, change occupancy, or override control sequences, the contractor will adjust the baseline. Require that the adjustment method, the triggering events, and your review rights sit in the contract, not in a later negotiation.

Measurement and verification obligations

Savings are not measured directly. They are the difference between metered consumption and a modeled baseline, so the method governs the result. The common references are the International Performance Measurement and Verification Protocol, ASHRAE Guideline 14, and the federal energy management program's verification guidance. Specify which one applies, which verification option covers each measure, and who pays for metering.

Require delivery of the underlying interval data and models, not only a summary report. Reserve the right to have an independent engineer reproduce the annual calculation, and set a remedy for late reporting. A guarantee nobody verifies is not a guarantee.

Controls and data ownership

Controls upgrades are where agencies quietly lose leverage. Require:

• Ownership of the control system, including graphics, programming, and the source of custom sequences.
• Administrator credentials and documented sequences of operation delivered at acceptance.
• Open protocol communication and a written commitment that another qualified contractor can service and expand the system.
• Ownership of trend and meter data with documented export, plus remote access and security terms matching your IT policy.
• Staff training, and post term service pricing not tied to vendor control of the system.

How it differs from design-bid-build

In design-bid-build, an independent designer writes the specification and bidders compete on identical scope. In a performance contract, design and construction sit with one firm chosen before scope exists, so competition happens once. The tradeoff is a single point of accountability for building performance in exchange for weaker price discovery. Prevailing wage, bonding, and public works rules usually still apply. Recover leverage by hiring your own owner's representative and benchmarking proposed unit costs against recent local construction awards.

Questions to ask before you sign

1. Which measures carry measured savings, and which are stipulated?
2. What are the audit fee, construction cost, contractor margin, financing cost, and verification fee?
3. What happens to the guarantee if we change building hours or close a facility?
4. Who owns the controls, the data, and the audit deliverable?
5. What is the term, and what is the remaining useful life of the equipment at term end?

A term running well past the equipment's service life is a warning sign.

HQT advises state and local agencies on the technology and data terms inside facility and controls procurements, including system ownership, integration, and data access.

Frequently asked questions