The Home Energy Saver is a government-funded website developed by Lawrence Berkeley National Lab. As such, we are unable to recommend or endorse specific products or service providers. However, the links below will help you find the answers you need. Before proceeding, have you tried our Frequently Asked Questions page? If your don't find your answer there, try these options:

Help using this site - User Guide or Browser Help

Frequently Asked Questions & Known Bugs - See list here.

Work-arounds -- we offer tips for modeling features or systems that we don't explicitly cover.

Run errors - Input combinations that are known to cause errors include entering a window area on a side of the house that is larger than the opaque wall on that side (excluding doors and garage), entering non-rectangular house dimensions that are physically not possible, or entering a thermostat start time that is not at least one hour after the previous period.

Questions about energy efficiency - Energy Librarian, Making it Happen, also try DOE's Information Center, "Energy Savers" guide and Consumer Fact Sheets.

Product recommendations - ENERGY STAR website and ACEEE lists of most efficient appliances, for lists of efficient products (including specific names and model numbers).

Contractor recommendations - Making It Happen: Installation. Also check with your local utility or State Energy Office.

Questions for your utility - Many utilities link to our site, but you need to contact them directly with questions about your service.

Find rebate programs - Utility rebate programs and Other financing options

Perform energy audits - Home Energy Saver on-line audit, or ask your local utility if they provide audits.

Calculate savings in your home - We cannot make customized analyses for you, but our online calculator will let you evaluate a huge variety of options.

Why your calculated results may not match your utility bill - Partial list of reasons.

Collaborating with us:

Do you want to link to the site? - You are welcome to do so; written permission not required.

Are you an educator seeking to use the site in your classroom? - Energized Learning site with classroom exercises.

Want information on the technical assumptions and methods behind the site? - Documentation on appliances, heating/cooling methods [text | tables (drafts)], and the tariff analysis methods is all available here. Information on our hardware/software configuration.

Are you a private software developer seeking to utilize our technology or data? - See the HES Mission statement.

Don't see what you need? Problems with the site? Feature requests? Praise? Give us your feedback.