This section of the EnergySmart Institute (ESI) website is intended as a quick reference resource.
Links and tabs connected to this section are offered as a complimentary service for our students and guests.
(Please note that any links to outside references does not imply endorsement of products or information.)

National Registry of HERS* Rated Homes:

Residential Energy Services Network (RESNET):

Building Energy Codes:

ICC - International Codes Council:

AHRI Directory of Certified Product Performance:

Interplay Learning (Online Simulation Tools):

The National Renewable Energy Laboratory (NREL):


*HERS = Home Energy Rating Systems