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 are shaping the industry—from policy development at state and local levels,
to building science education and compliance assessment tied to efficiency gains in buildings;
with our efforts ensuring energy efficiency at work and in the home.
We offer a number of services and tools designed to provide our clients with the most contemporary in home performance, building science, Duct & Envelope Tightness (DET), code development, plan review, LEED® facilitation, commercial and residential loads and equipment selection.