Technical Notes

Home Energy Scoring Tool

- Energy calculation methods: Methods unique to the HEScore Tool are documented here.

Home Energy Saver

A comprehensive summary of the broader Home Energy Saver, or HES, system calculation methodology, data, and infrastructure is available here.

- Google Map not included in APIs: However, users are welcome to open the HES version in conjunction with their own sites. That link is:


- National Residential Efficiency Measures Database: Retrofit cost data embedded in the application programming interfaces is provided by the National Renewable Energy Laboratory.

- Energy calculation methods: A synopsis of the engineering methods can be found here.