Description
2021 International Energy Conservation Code (IECC)
The 2021 International Energy Conservation Code, published by the International Code Council, sets the minimum regulations for energy-efficient buildings through separate commercial and residential provisions. It gives architects, engineers and builders prescriptive and performance-based requirements for cutting energy use in new construction.
The code covers building envelopes, mechanical systems, lighting systems and service water heating, and it is written to lower both energy consumption and utility costs on a project.
Building envelope and system requirements
Insulation, fenestration and air leakage requirements set the thermal performance of the building envelope, while separate provisions cover HVAC, electrical lighting and service water heating systems. Together these sections give a project team one reference for the mechanical and structural sides of energy performance.
Compliance paths
Builders and designers can meet the code through a prescriptive path that lists fixed requirements, a performance-based path that models the whole building, or the Energy Rating Index (ERI) path, which scores a home against a reference design. The three paths give a project flexibility in how it documents compliance.
Book details
- Title: 2021 International Energy Conservation Code (IECC)
- Edition: 2021
- Publisher: International Code Council (ICC)
- ISBN-13: 9781609839611
Questions buyers ask
Who is the 2021 IECC written for?
Architects, engineers and builders use it to meet minimum energy efficiency requirements on commercial and residential projects.
Does it cover both commercial and residential buildings?
Yes, the 2021 edition separates its provisions into distinct commercial and residential sections.
What compliance paths does the code allow?
It offers a prescriptive path, a performance-based path and the Energy Rating Index (ERI) path.
What does the code require for the building envelope?
It sets requirements for insulation, fenestration and air leakage to control the thermal performance of the envelope.
Does the code cover HVAC and lighting systems?
Yes, it includes provisions for mechanical systems, electrical lighting and service water heating alongside the envelope requirements.
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