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Illinois Stretch Energy Code

(20 ILCS 3125/55)

Development of the Illinois Stretch Energy Code shall be completed by December 31, 2023 and available for adoption by municipalities by June 30, 2024.

Illinois Public Act 102-0662 The Climate and Equitable Jobs Act (CEJA) requires The Board, in consultation with the Agency, shall create and adopt the Illinois Stretch Energy Code, to allow municipalities and projects authorized or funded by the Board to achieve more energy efficiency in buildings than the Illinois Energy Conservation Code through a consistent pathway across the State. The Illinois Stretch Energy Code shall be available for adoption by any municipality and shall set minimum energy efficiency requirements, taking the place of the Illinois Energy Conservation Code within any municipality that adopts the Illinois Stretch Energy Code.

The Illinois Stretch Energy Code defines energy efficiency measures that meet the levels defined by CEJA.  CEJA sets energy efficiency levels based on a site energy index relative to the 2006 International Energy Conservation Code (IECC).

Commercial Buildings

By 6/30/24 must have a site energy index no greater than .60 of the 2006 IECC.

By 12/31/25 must have a site energy index no greater than .50 of the 2006 IECC.

By 12/31/28 must have a site energy index no greater than .44 of the 2006 IECC.

By 12/31/31 must have a site energy index no greater than .39 of the 2006 IECC.

Residential Buildings

By 6/30/24 must have a site energy index no greater than .50 of the 2006 IECC.

By 12/31/25 must have a site energy index no greater than .40 of the 2006 IECC.

By 12/31/28 must have a site energy index no greater than .33 of the 2006 IECC.

By 12/31/31 must have a site energy index no greater than .25 of the 2006 IECC.

Announcements

On 5/24/23 the Illinois Legislature voted to extend the adoption date of the Illinois Stretch Energy Code by 6 months (Public Act 103-0004). The extension was sought after receiving public comments expressing concern over the availability of the 2024 International Energy Conservation Code and to allow time for a cost analysis to be completed by Pacific Northwest National Laboratory.

CDB shall complete recommendations and development for the Illinois Stretch Energy Code elements and requirements by December 31, 2023. The Illinois Stretch Energy Code shall be completed and available for adoption by municipalities by June 30, 2024.

The Residential Stretch Code will be based on the 2021 IECC with amendments to ensure the site energy indexes in CEJA are being met. The code language has been approved by the full Advisory Council and will be considered by the CDB Board on 2/13/24.  A draft of the proposed amendments can be viewed here Illinois Residential Stretch Code Draft

The Commercial Stretch Code will be based on the 2024 IECC Final Draft with amendments to ensure the site energy indexes in CEJA are being met. The code language has been approved by the full Advisory Council and will be considered by the CDB Board on 2/13/24.  A draft of the proposed amendments can be viewed here Illinois Commercial Stretch Code Draft

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