Terms of Use
Last updated:
Information only
The decoders, guides and calculators on this site are for general information. A build date read from a serial number, and a lifespan range, are estimates. They are not a warranty determination, a safety assessment, an inspection, or advice to repair or replace any equipment. For those, contact the manufacturer or a qualified professional.
Accuracy
We build each decoder from the rule shown on its page and say where a rule is incomplete. Manufacturers can change or reuse serial formats, and a unit may not follow the format we describe. We do not guarantee that any result is correct. Check anything important with the manufacturer.
Manufacturer names
This site is independent. Bradford White, A.O. Smith, Carrier and other names are used only to identify products, and belong to their owners. No manufacturer endorses or sponsors this site.
Limitation of liability
To the fullest extent the law allows, the site's owner is not liable for loss or damage arising from use of, or reliance on, the site or its results. The site is provided as it is, without warranties of any kind.
Changes
We may change the site and these terms. The latest version is on this page. See also the privacy policy, the about page and the contact page.