The International Code Compliance Calculator (IC3) is a performance-based IECC residential energy code compliance tool designed to simplify and support the compliance process. IC3 helps builders, designers, and energy professionals evaluate building energy performance and demonstrate compliance with IECC energy codes efficiently.

International Code Compliance Calculator (IC3) Tool

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For more information or assistance with the International Code Compliance Calculator (IC3) Tool, please contact us today.

Contact the IC3 Group

Principal Investigators

Jeff Haberl, Ph.D., P.E.inactive, FASHRAE, FIBPSA
Bahman Yazdani, P.E.
Juan-Carlos Baltazar, Ph.D., P.E.

Staff

Patrick Parker
Radha Kommineni
Angie Rowell, CAP-OM
Kimberly Greer
Gali Zilbershtein, Ph.D.
Qinbo Li, Ph.D.

Students

Jinglin Yang
Yu Sun
Boshra Khaled Muhmood Akhozheya
Tianyue Chang

Stakeholders

William S. “Stan” Folsom
Patricia Chawla

Sponsors

Accessibility improvements are in progress ahead of the April 2027 deadline. If you need immediate access, visit our Accommodations page.