About our service

The Home Energy Saver (HES) tool suite empowers homeowners, renters, and professional home energy service providers to save money, live better, and help the earth by reducing energy use in homes. HES recommends energy-saving upgrades that are appropriate to the home and make sense for the home’s climate and local energy prices. The money invested in these upgrades commonly earns “interest” in the form of energy bill savings, at an annual rate of 20% or more. HES also estimates the home’s carbon footprint and shows how much it can be reduced.

The HES and HES PRO tools compute a home’s energy use on-line in a matter of seconds based on models and data developed at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory. All end uses are included. These tools generate list of energy-saving upgrade recommendations for the user’s consideration. Our engineering methodology is not a “black box”we extensively document all methodologies and assumptions.

The specialized Home Energy Scoring Tool (HEScore) provides a more prescriptive methodology for asset rating, using standardized operational assumptions.

For all our implementations, we use our own APIs (aka “eat our own dogfood”). API licensees can replicate this same process flow (assisted by our Client GUI Template) or devise their own. Here is how the API implementation at our site works.

Specific Capabilities of Home Energy Saver and Home Energy Saver PRO:

  • Estimate energy use, cost, and carbon emissions for all major appliances and dozens of smaller appliances, lighting, and water heating using a flexible description of home size, orientation, insulation levels, window types, and thermal distribution strategy
  • Calculate heating and cooling energy using real weather files for ~300 US locations
  • Estimate energy bills by fuel using state defaults or electric utility tariffs in many locations
  • Estimate savings and cost-effectiveness based on fully flexible characteristics & operational factors or with preset “asset-based” factors and assumptions
  • Evaluate the potential savings and payback periods of scores of retrofit options
  • Determine the carbon footprint of the existing home and carbon savings after retrofits
  • Separately track each fuel
  • Estimate the effect of operations, such as thermostat management and laundry settings.
  • All default values can be over-ridden by user
  • Fully defaulted baseline values, so that runs can be done without extensive user input.
  • Generate high-level “roll-up” reports and drill-downs by end-use and all the way to the individual device level

The basic Home Energy Saver methodology works as follows:

A. Users begin their exploration on the START page by simply entering their zip code to receive instant initial estimates for typical and efficient homes in their area. By providing more information about their home through the DESCRIBE forms, users receive increasingly customized results along with itemized energy-saving upgrade recommendations. For example, by entering the number and age of the major appliances, users can estimate their energy consumption based on historic sales-weighted efficiency data. A very detailed module is also included to estimate energy consumption for lighting and dozens of miscellaneous gas and electric appliances, with default values based on data compiled by energy researchers.

B. Results appear on the COMPARE page, where users can see their existing home’s current energy profile compared to that with the recommended package of energy saving upgrades. Lots of “drill-down” reports are available for more detail.

C. The UPGRADES pages provide a tailored list of recommendations ranked by payback time. Users can vary the energy efficiency assumptions in many cases, as well as the upgrade costs and then recalculate the results. The results can be viewed on line or via a customizable printable report that includes upgrade descriptions and other details, and include links to additional information.