Editorial standard
How we verify what we publish
A comparison site is only worth reading if you can tell which parts were checked. This page defines exactly what our labels mean, so you never have to guess how much weight a given sentence carries.
Three labels, and only three
- Verified
Confirmed against a primary source
We located the claim in a document that does not belong to the party making the claim: a published standard, a certification body's listing, a regulator's filing, a test report, or a public registry. We record which source and when we checked it. If the source later changes, the claim changes with it.
- Attested
Stated by the supplier, not independently confirmed
Plenty of true and useful information exists only in supplier-controlled material — internal capacity figures, project counts, service coverage. We will publish it when it is relevant, labelled as attested, so the reader knows exactly what weight it carries. Attested never gets presented as verified because it is inconvenient to leave a field blank.
- Not published
We leave it out
Pricing we cannot source to a real quote or filing. Performance numbers that exist only in a brochure. Vendor rankings that a vendor paid to influence. If the honest answer is that we do not know, the page says we do not know.
What counts as a primary source
For safety and code questions, the standard itself — NFPA 855, the UL 9540 and 9540A documents, and the adopted building and fire codes in the jurisdiction under discussion. Where a certification is claimed, the certifying body's own listing database, not a logo on a datasheet.
For performance and degradation, published test data and the warranty document, because the warranty is the only performance statement a supplier is contractually bound to. Marketing figures and warranty figures frequently disagree; we quote the warranty.
For end-of-life and recycling, the processor's permits and registrations, transport classification under the applicable dangerous goods rules, and downstream documentation. A recycling claim with no named downstream is not a verified claim.
Corrections
We will get things wrong. When we do, we correct the page rather than quietly deleting it, and we say what changed. If you can point to a primary source that contradicts something we have published, that is the fastest way to change what appears here — including if you are the supplier being discussed.