WattPair Spec Transparency Index

63 brands and standards bodies, across 38 appliance load records this site has built. This project has actually checked 57.6% of the field × brand combinations it tracks — the rest it has simply not looked at yet. Of what it has checked, 89.4% turned out to be published somewhere in the brand's own documents.

By brand, most-checked first

42 of 63 brands answered everything this project checked their own documents for — a 100% publish rate on the fields this index tracks. At the other end, 4 brands have zero published fields among the ones this project actually checked: EHEIM, Russell Hobbs UK, Hayward, Little Giant. Neither number is a rating — see what this index does not claim.

"Checked total" is the sum of the first two columns — the field × brand cells this project has actually looked at for that brand. It is not that brand's share of the 21 fields this index tracks overall: most brands make only a few of the appliance records in the corpus, so most rows here are checked against a handful of fields, not all of them.

By field, most-tracked first

The same two buckets, read the other way: which of the 21 fields this index tracks are the ones this project has actually gotten around to checking, and which are still mostly untouched.

When official sources disagree

A different kind of gap: not silence, but two documents that are both live, both official, and say different things. Three worked examples from this project's own cross-checking — described here, not quoted; see methodology for how the site treats an open conflict wherever it touches a page.

Two of these three are logged against a specific appliance record's own data and count toward that record's field totals above; the pool-pump case is logged centrally because it never entered any value this site actually uses — this project's figures for that appliance class come from a different brand entirely, precisely because these three documents could not be reconciled.

What the checked fields were read from

194 source citations behind the checked fields above, and every one of them is tier official — a manufacturer specification sheet, manual, product page, support article, or a government / standards-body document. This project holds no measured tier of its own (no laboratory) and no user-submitted tier for these fields.

Method

Every count on this page is generated from the same 38-record appliance load corpus this site’s pages and its open dataset are built from, by a script that reads each field’s ValueMeta envelope directly: a non-null value counts as published and is attributed to whichever brand’s document the figure’s own source_label names; a null value counts as checked-and-absent only when it carries an absence_verified block naming that brand’s own document and the date it was read; every other null counts as not-investigated. A source whose name is not brand-prefixed — a government efficiency filing, a standards body — is attributed to a normalised publisher name rather than dropped, because a comparison between what a regulator publishes and what a manufacturer publishes is exactly the comparison this index exists to make.

Generated 2026-08-16 by data-staging/transparency-index-stats.py against site/src/data/appliances/*.json (38 records) + site/src/data/conflicts.json (register). Reproducible: the script takes no network input, and re-running it against a later corpus snapshot is a checked-in file update, not a live recomputation on every build — the same posture as this site's other open datasets.

What this index does not claim

Licence

The counts and the CSV above are WattPair's own compilation, published under CC BY 4.0, same terms as the appliance load dataset it is generated from. Attribution:

WattPair Spec Transparency Index
© WattPair — CC BY 4.0
Source: https://wattpair.com/data/spec-transparency/

This project does not own, and does not relicense, the underlying manufacturer and government documents the counts describe. Facts about which document contains which figure are not copyrightable; the compilation, the counts and the structure of the CSV are.

Related