Nobody replaces a water heater because of a quad. But a number DOE is proposing to put in writing decides which water heaters get built — and it closes for comment in ten days.

Every contractor I know has an opinion about efficiency standards, and almost all of it is about the last transition rather than the next one. The refrigerant changeover taught the trade what a forced redesign costs: training, tooling, a year of unfamiliar equipment, and a customer who wants to know why the same job costs more than it did in the spring.

So here is a document worth ten minutes, because it is about whether the next one happens at all. On July 7 the Department of Energy proposed rewriting the Process Rule — the internal rulebook that governs how DOE decides to set or amend an energy conservation standard. Fifty pages. Comments close August 6.

The center of it is a definition. DOE wants to write down what “significant energy savings” means as a number, and if a proposed standard does not clear that number, DOE does not proceed.

The proposed test for “significant energy savings” — a 10-percent reduction in full-fuel-cycle energy use over a 30-year period, or a 2 quad reduction over the same period. Meet either one and the rulemaking may proceed.

DOE says it may also consider alternatives ranging from 5 to 15 percent, or from 0.5 quads to 5 quads.

DOE did the arithmetic on its own history and published it, which I respect — it is a much more honest way to argue for a threshold than adjectives.

Thirty rulemakings that would not have happened. Ninety-one and a half percent of the savings kept anyway. If you have lived through a standards transition, that trade is not obviously a bad one, and I will say plainly that I would take fewer, larger changes over a decade of small ones. Churn is expensive and the customer pays for it.

But look at the example DOE chose to show the threshold working, because it is doing something stranger than it appears.

The two products in the back of your truck are, by DOE's own account, the reason the second threshold exists at all. A percentage test alone punishes anything that already uses a lot of energy: the 2001 consumer water heater standards were projected to save 4.6 quads of source energy, and that was still only a 4-percent reduction across the analysis period. DOE names the category directly — the quad-based test exists for “covered products and equipment that use more energy (e.g., water heaters and central air conditioners and heat pumps).”

Which is the practical read for anyone who installs this equipment. Big-box categories can clear the bar on absolute volume. Everything smaller in the house — the accessories, the controls, the low-consumption products — is where a 10-percent-or-2-quad floor quietly ends the rulemaking pipeline.

Both documents came out on July 7. The one that asks questions got twice as long as the one that changes the rules.

Kept honest: this is a proposed rule and it changes no energy conservation standard. It is a rewrite of DOE's own procedural rulebook, and DOE has been explicit that a product failing the threshold in one rulemaking is not foreclosed from a later one — the whole argument for the threshold is that savings accumulate until a rulemaking is worth doing. The 91.5-percent and 30-of-86 figures are DOE's own estimates from its own supporting table, based on final rules published from 1989 through 2025, and DOE notes the site-to-full-fuel-cycle conversion varies by rulemaking; they have not been independently checked here. The observation that splitting a change across two rulemakings can leave neither half qualifying is mine, drawn from DOE's walk-in cooler example — DOE presents that example to make the opposite point. The 30-day and 60-day comment windows are both within normal practice for their document types; the comparison is offered as a fact about these two documents, not as a claim that either is improper. Nothing here is legal advice, and none of it changes what any installer can sell or install today.

Sources (primary, verified today): U.S. Department of Energy, “Energy Conservation Program: Procedures, Interpretations, and Policies for Consideration of New or Revised Energy Conservation Standards and Test Procedures for Consumer Products and Certain Commercial/Industrial Equipment,” notice of proposed rulemaking and announcement of webinar, 91 FR 42034 (July 7, 2026), docket EERE-2025-BT-STD-0001, RIN 1904-AF72 — the proposed thresholds, the 91.5-percent / 30-of-86 estimate, the walk-in cooler example, the water heater figure, the “binding on DOE” proposal and the public-input passage are all quoted from the govinfo text of that document (federalregister.gov serves its own full-text file behind a block). The comment deadlines, publication dates and dockets for both this proposal and the companion RFI, “Review of DOE's Analytic Methods for Setting Energy Conservation Standards” (91 FR 41578, docket EERE-2022-BT-OT-0004), were confirmed against the Federal Register JSON API. Prior rules referenced by DOE inside the document: 82 FR 31808 (2017 walk-in coolers), 89 FR 104616 (2024 walk-in coolers), 90 FR 21391 (2025 withdrawal), 66 FR 4474 (2001 water heaters), 85 FR 8626 (2020 Process Rule). No trade coverage supplied any fact in this edition.

The Department of Energy is proposing to write down a number that decides whether an efficiency standard gets written at all. Comments close August 6.

The document is a rewrite of the "Process Rule" — DOE's internal rulebook for how it sets and amends energy conservation standards. 91 FR 42034, published July 7. Fifty pages.

The center of it is a definition. "Significant energy savings" would mean at least a 10-percent reduction in full-fuel-cycle energy use over 30 years, OR a 2 quad reduction over the same period. Miss both and the rulemaking doesn't proceed. DOE says it may also consider 5 to 15 percent, or 0.5 to 5 quads.

Then it does something I respect: it ran the threshold against its own history and published the result.

"A threshold based on a 10-percent reduction in FFC energy use over a 30-year period or a 2 quad reduction... would retain 91.5 percent of the energy savings from the program while eliminating 35 percent of the rulemakings (30 of 86 rulemakings)."

Thirty rulemakings that don't happen. 91.5% of the savings kept anyway. If you've lived through a standards transition — the training, the tooling, the year of unfamiliar equipment, the customer asking why the same job costs more than it did in the spring — that trade is not obviously a bad one. I'd take fewer, larger changes over a decade of small ones.

But look at the example DOE picked to show the threshold working.

Walk-in coolers and freezers. The 2017 final rule: 0.85 quads, an 8% reduction. Below both thresholds. The 2024 final rule: 1.6 quads, a 6% reduction. Also below both thresholds. DOE's own sentence: "These values also would not meet the proposed thresholds for significant energy savings, but the combined energy use reduction of the two final rules would represent over 2 quads of FFC energy savings."

DOE offers that as the point — stop the incremental grind, let savings accumulate until a rulemaking is worth doing. Fair. Read it the other way and it's equally true: whether a saving is "significant" depends on how often you write the rule. Split one change into two and neither half qualifies.

For anyone in HVAC or plumbing, the products in the back of your truck are why the second threshold exists at all. A percentage-only test punishes anything that already uses a lot of energy: the 2001 water heater standards were projected to save 4.6 quads and that was still only a 4% reduction. DOE names the category directly — the quad test is there for "water heaters and central air conditioners and heat pumps."

So the big categories can clear the bar on absolute volume. It's everything smaller in the house — accessories, controls, low-consumption products — where a 10%-or-2-quad floor quietly ends the pipeline.

One more thing in the document, and it's the part I'd actually want kept: DOE proposes to make appendix A binding on itself for certain actions. A process an agency has to follow is a process you can hold it to.

And one fact I'll just leave here. DOE published two documents on July 7. This one — the one that changes how standards get made — takes comments for 30 days, closing August 6. The companion request for information on its analytic methods takes them for 60, closing September 8. From page 42044 of the same proposal: "it is crucial that DOE regulatory actions provide sufficient opportunity for public input so that stakeholders have adequate time to analyze and provide thoughtful comments."

The docket will fill with manufacturers and advocacy groups arguing about quads. Almost none of them install anything. If you know what a transition cost you in training and callbacks, what it did to lead times, what the customer actually paid — that's data nobody else in the record has.

Docket EERE-2025-BT-STD-0001, regulations.gov, by August 6.

And if a customer asks: this changes nothing they can buy. Not a standard, not a ban, not a product change. Every existing standard stays exactly where it is.

Source: 91 FR 42034 (July 7, 2026), read from the govinfo text. Deadlines confirmed against the Federal Register API.

FIRST SOURCE · one verified original-source finding, composed for one reader · this edition: home services — written for the HVAC, plumbing and electrical contractors whose customers only ever meet an efficiency standard as a price change