The Canadian window label after the zones were retired

From February 2015 to the end of 2019 the programme divided the country into three bands by heating degree days: under 3,500 along the mild coast, 3,500 to under 6,000 through the populated southern strip, and 6,000 and above for everything colder. A window earned a rating in a band, and the buyer matched the band to the map.

Version 5.0 removed the bands. It took effect on 1 January 2020 and applies one criterion nationally: an Energy Rating of 34, or a U-factor of 1.22 W/m2K. Under the table it replaced, the 6,000 and above band also called for an Energy Rating of 34, so the national figure is the coldest band applied to the whole country. A unit sold as a zone-something rating in 2026 is quoting a document that expired. The number to ask for is the model designation and the rating on its registration, not an adjective in a brochure.

Two unrelated programmes both end up on the frame. The structural one runs through AAMA/WDMA/CSA 101/I.S.2/A440 with the Canadian supplement, tested and then certified by an organisation accredited by the Standards Council of Canada for the product scope. The energy one runs through the national energy specification, with the model registered with Natural Resources Canada and certified by an accredited body or by the National Fenestration Rating Council.

They are not the same certificate and one does not imply the other. The energy specification asks that models be tested to the fenestration standard and its supplement, and then notes in the same clause that certification to those documents is a separate matter. A factory can hold a valid energy registration and no structural certification, or the reverse. The Canadian window label is where a buyer sees which of the two is actually behind the unit in the crate.

The certifier supplies a temporary label that carries the energy performance values, and it is dense. It shows the manufacturer or the private labeller name, the product or series name, the frame type, the operator type, and the glazing build: layers, gas fill and how many cavities are filled, the low-e coating with the surface numbers it sits on, and the grille height where there is one. It carries the registration number issued for the model, the certified physical performance values where those exist, and the certifier mark.

Two spacing rules matter in practice. The energy mark may not appear on its own: it has to be attached to the certifier label or within 2.5 cm of it. And a physical performance value that has not been certified may not appear within 0.5 cm of that label, which closes the obvious trick of printing an uncertified structural number next to a certified energy claim.

The programme labels assembled production units. A sealed insulating glass unit is marked by the glass maker under its own certification, which is a different document about a different component, and it does not stand in for the unit label.

Mulled assemblies have their own rule. Where a composite unit repeats the same operator type, one label covers that operator type across the assembly: two operable casements and two fixed ones need one label on each type, not four. Where the units inside the assembly differ, each one is labelled, and each label shows the qualification of the unit it sits on.

Private labelling is the case where a manufacturer builds and distributes under a brand that is not its own. The requirement is administrative, not cosmetic: privately labelled models have to be registered with Natural Resources Canada under the brand name. The brand is not a sticker over the factory name on the window label, it is a separate registration with its own model file.

The certifier has to allow it as well, because its rules govern what a temporary label may show. In practice a distributor asking for private label is asking for two things at once: a model registered under its name, and a label the certifier will accept. Neither happens after the container is packed.

The templates come from the programme, and deviations need written approval. A custom label is reviewed on mock-ups submitted to the programme address, and the published turnaround is two to four weeks. The templates also fix the ink build for reproduction, which is the part a designer will get wrong if nobody says so, and a label on the spine of the unit or its packaging is permitted.

There is a ceiling above the standard mark as well. The Most Efficient designation carries its own annual criteria, and its logo may not be applied to the product as a label. It lives in promotion, not on the frame.

The energy programme does not require certified structural performance. Where a unit is certified structurally by an independent body, that body decides what its own label has to show, and its requirements sit alongside the energy ones. A Canadian unit can legitimately carry two labels from two organisations, and a buyer should expect that rather than read it as a mistake.

Provincial and local authorities are a third voice. They may set their own expectations for what a label has to state where the unit is installed, which is why a submittal pack is assembled per project instead of reused across the country.

The two national programmes differ in their technical specifications, and the marks are administered separately. In Canada the symbol is registered by the United States Environmental Protection Agency and administered by Natural Resources Canada, and using it requires an administrative arrangement with the Canadian programme.

There is a sharper edge in the other direction. Goods exported into the United States can be seized by customs where the energy symbol is not displayed according to the American guidelines. A factory shipping to both markets is running two label programmes, and a single artwork that satisfies neither is the usual result of treating them as one.

Rebate and incentive programmes ask for proof, and the label is what the purchaser is told to keep. The guidance is explicit that the buyer should retain the energy label and the certification label as evidence of purchase. A distributor who explains that at handover saves the owner an argument months later, and it costs nothing to say.

Which body certifies the model, and for what scope. What the registration number is, so it can be checked against the published list. Which band a document still claims, and what replaced it. And whose name sits on the window label, which is the question that decides whether a private label order is a registration or a repack.

None of the four needs a technical argument. They are administrative questions with administrative answers, and they are cheapest to ask before the drawing is released.