What is the Illinois
Energy Conservation Code?

Frequently asked questions

Useful websites

SEDAC Energy Code Tools

SEDAC's Energy Code publications

Manual J Load Sizing

Check out SEDAC's Energy Code Smart Tip on Manual J Load Sizing. Learn about why modern buildings need Manual J […]

Domestic Hot Water Recirculation

Can Domestic Hot Water Recirculation Systems Conserve Energy? The US Department of Energy estimates that more than 400 billion gallons […]

Below-grade Insulation

Check out our new Energy Code Smart Tip for below-grade insulation! What insulation is required for below-grade walls? On the […]

Slab Insulation

Slabs can be big culprits for energy loss from heat that is conducted outward and through the perimeter of the […]

Energy Code Smart Tip: Energy Rating Index

Newly constructed residential buildings in Illinois have three paths for compliance. This energy code smart tip explores the basics of […]

How COVID-19 is Affecting Code Officials

How is the COVID-19 pandemic impacting the work that code officials do? Will the pandemic impact compliance with the Energy […]

Duct Leakage Testing

Duct leakage testing helps to make sure that ducts are properly sealed to create an energy efficient, comfortable, and healthy […]

Increasing Energy Code Compliance

Illinois law requires all new commercial and residential construction projects to comply with a statewide energy conservation code. The current […]

An Introduction to COMcheck & REScheck

The Department of Energy developed COMcheck and REScheck to improve consistency in code compliance. These free, easy-to-use tools help verify […]

Thermal Comfort

Why should designers and building professionals make the extra effort to comply with the Illinois Energy Conservation Code? Following the […]