Terms of use

Last updated July 16, 2026

By using HotWaterAtlas you agree to these terms. They are short and in plain English.

Informational purposes only

HotWaterAtlas provides specifications, calculations, and guides for general information. We work hard to keep the data accurate — the methodology page documents how — but specifications change, certifications lapse, and errors happen. Always verify critical details against the manufacturer's current documentation before buying.

Not installation advice

Circuit sizes, breaker ratings, venting notes, and installation requirements on this site describe general U.S. code rules. They are not a substitute for a licensed plumber's or electrician's assessment of your gas lines, venting, panel, and local code amendments. Water heaters involve gas combustion, high-temperature water, and electrical loads; installation and permit requirements are the domain of licensed professionals, and you rely on generic guidance at your own risk.

No warranty

The site and its data are provided "as is", without warranty of any kind. To the maximum extent permitted by law, HotWaterAtlas is not liable for any damages arising from use of the site, including purchase decisions or installations based on its content.

Data and attribution

Water heater certification data originates from the U.S. EPA ENERGY STAR program and remains subject to its terms; HotWaterAtlas is not affiliated with or endorsed by the EPA. The site's original text, guides, and computed presentations are © HotWaterAtlas. You may quote brief excerpts with attribution and a link; wholesale reproduction of pages or the compiled database requires permission — ask us.

External links

Links to manufacturers, retailers, and data sources are provided for convenience. We don't control those sites and aren't responsible for their content. Some links are affiliate links — see the affiliate disclosure.

Changes

We may update these terms; the date above reflects the latest revision. Continued use of the site after a change constitutes acceptance.