H is for HERS Index

The HERS (Home Energy Rating System) Index is the industry standard by which a home’s energy efficiency is measured. It is the only nationally recognized system for inspecting and calculating a home’s energy performance.
Home Energy Score on the (DOE) Building America site: www.energy.gov

Home Energy Score Interactive Graphic on the (DOE) Building America site: www.energy.gov

Description of the HERS Method by Martin Holladay on the Green Building Adviser site: www.greenbuildingadvisor.com

RESNET. Mortgage Industry National Home Energy Rating Systems Standards. Residential Energy Services Network, 2013.
Available from: www.tragreen.com

Data: Various sources
graphic: by jmr