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International Energy Conservation Consultants LLC

International Energy Conservation Consultants (IECC_LLC) is an energy codes & standards development, education, and whole building energy simulation services group with design professionals located in Chicago, Champaign and Tinley Park, Illinois. IECC_LLC comprises a select group of nimble energy engineers, architects, home-performance and regulatory practitioners with an unprecedented combination of code development, design, and compliance assessment experience. Our projects shape the industry—from policy development at state and local levels, to building science education and compliance assessment tied to efficiency gains in buildings; our efforts ensure energy efficiency forward at work and in the home.  Please visit us at, or share your successes in energy efficient construction using the “Contact us” tab.

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