Zero Energy Certification 1.0 Handbook
April 2025
April 2025
Table of Contents
Zero Energy Certification 1.0 Handbook
April 2025
Zero Energy Certification 1.0 Handbook — April 2025
April 2025
Zero Energy 1.0 Handbook
Overview
Clarifications
Energy Budget Clarifications
Energy Use Clarifications
Performance Period Clarifications
Renewable Energy Clarifications
Scale Jumping
Exceptions
Documentation Requirements
Case Studies
Resources
ILFI Program Glossary
A-G Terms
H-P Terms
Q-Z Terms
Summary of Changes
April 2025 Updates
Changes to Clarifications (Q1 2025)
October 2024 Updates
Changes to Energy Budget, Energy Use, and Renewable Energy (Q3 24)
Changes to Documentation Requirements (Q3 24)
May 2024 Updates
Changes Throughout (Q1 24)
Changes to Energy Budget, Energy Use, and Renewable Energy (Q1 24)
Changes to Scale Jumping (Q1 24)
Changes to the Exceptions (Q1 24)
Changes to the Resources (Q1 24)
Changes to the Glossary (Q1 24)
July 2023 Updates
Changes Throughout (Q2 23)
Changes to Documentation Requirements (Q2 23)
Previous versions of the Handbook
Download as PDF
Changes to Documentation Requirements (Q3 24)
October 2024
ZE-1 Energy Narrative + Schematic Drawing
Ready Audit
Edits clarifying that calculations must show expected operation at net zero
Changes to Energy Budget, Energy Use, and Renewable Energy (Q3 24)
May 2024 Updates