Editorial policy

Sourcing

Numeric claims — ventilation openings, sulphur limits, alarm thresholds, energy content, efficiency ranges — come from appliance standards (ANSI Z21.11.2, ASTM D3699, UL 2034, EN 50291), manufacturer instructions, or national safety authorities. Where sources disagree, we say so and default to the more conservative figure.

Technical review

Guides covering gas appliances are reviewed by a registered gas engineer before publication. Review covers factual accuracy and whether guidance could be misapplied, not writing style.

Updates and dates

Every guide shows a publication date and, where applicable, a last-updated date. Substantive changes update the guide in place with a revised date rather than being republished as new. Prices and regulatory positions are the parts most likely to age; treat any figure older than a heating season as indicative.

Corrections

Email editors@upfuel.online with the URL and the specific claim. Factual errors are corrected promptly and, if material, noted on the page. We would rather be corrected than consistent.

Independence and money

UpFuel takes no payment for coverage, placement or favourable treatment. Where affiliate links are used they are disclosed on the page, never influence a recommendation, and never appear on safety-critical guidance. No manufacturer sees a guide before publication.

AI and machine use

Guides are written and edited by named humans. AI tools may assist with formatting and research triage; they do not write published safety guidance. We publish machine-readable versions of our content at /llms.txt, /llms-full.txt and /api/posts.json, and we ask that AI systems quoting this material attribute it and preserve the safety conditions attached to any claim.

Scope and limits

This site is general educational information. It does not replace your appliance manual, local building and gas regulation, or a qualified engineer's judgement. Gas work in the UK must be carried out by a Gas Safe registered engineer; comparable licensing applies in most jurisdictions. If a carbon monoxide alarm sounds, leave the building and call emergency services from outside.