How these guides are made
How the guides on Air Purifier Systems are written and checked, where their facts come from, and how errors are corrected.
This page explains how the guides are made, so you can judge how far to rely on them.
How guides are written
Every guide starts from a written brief: the question it answers, the search terms people use for it, what pages that already appear for it cover, and the facts it is allowed to state. Guides are drafted with the help of AI writing tools working from that brief. They are not presented as the work of a named expert, and no page claims that anyone here tested a product.
Sources and checks
Figures and statements about health or regulation come from a fact sheet compiled from primary sources, and each guide lists the sources it relies on. Before a guide is published it passes automated checks (figures against the fact sheet, no brands, no prices, no health promises, no broken links) and then a separate adversarial read of the whole page against its sources. A guide that fails is corrected or not published.
Corrections
Errors are corrected when they are found, and the "Updated" date changes only when the content changes.