Final evaluation research memos are posted on this page, organized by utility. Evaluation research memos summarize research completed by independent evaluators. Draft evaluation memos can be found on the Draft Evaluation Materials page.
Evaluation Research for Ameren Illinois
- Opinion Dynamics Memo: Ameren Illinois Arrearage Reduction Pilot Study Results (May 7, 2025)
- Opinion Dynamics Memo: 2024 Ameren Illinois Company Income Qualified Initiative Smart Savers Channel Process Evaluation (March 24, 2025)
- Ameren Illinois Small Business Direct Install Trade Ally Satisfaction Research (March 5, 2025)
- Ameren Illinois Income Qualified Participant Non-Energy Impacts Assessment (Oct. 31, 2023)
- Opinion Dynamics Memo: Ameren Illinois Community Action Agency Staffing Pilot Process Research Findings (Feb. 17, 2025)
- Memo from Opinion Dynamics to Ameren Illinois: 2024 Midstream HVAC Channel Market Effects and Process Research Findings (Dec. 16, 2024)
- Ameren Illinois 2023 Societal Health Non-Energy Impacts Report (Dec. 9, 2024)
- Ameren Illinois Income Qualified Benchmarking Research Memo (Aug. 5, 2024)
- Opinion Dynamics Memo: Ameren Illinois Small Business General Population Survey Results (May 17, 2024)
- Opinion Dynamics Memo: Ameren Illinois 2023 Program Evaluation - Energy Advisor Interview Findings (March 18, 2024)
- Ameren Illinois 2022 Small Business Initiative Logic Model
- Evaluator Memo: Ameren Illinois 2022 Small Business Initiative Program Theory and Logic Model
- Memo to Ameren IL: Smart Savers Channel Participant Survey Results (Oct. 10, 2023)
- Memo to Ameren IL: Mobile Homes Community Mapping Results (May 8, 2023)
- Midstream HVAC Initiative: Summary of Findings from 2021 Distributor and Contractor Interviews (Ameren IL)
- Ameren Illinois Market Development Initiative Partnership Study: Summary of Findings (Sept. 9, 2022)
- Memo from Opinion Dynamics to Ameren Illinois: Summary of Findings from 2021 Property Manager Interviews (July 25, 2022)
- Ameren Illinois Empower Communities Study Final Report (July 11, 2022)
- Ameren Illinois Low Income Needs Assessment Final Report (June 1, 2022)
- Ameren Illinois Nonresidential NEIs Case Study Results: Manufacturing/Industrial
- Memo from Opinion Dynamics to Ameren Illinois: Non-Residential NEI Estimation Approach (March 30, 2022)
- Memo to Ameren IL: 2020 Economic and Employment Impacts Analysis (Jan. 25, 2022)
- Memo to Ameren IL: 2021 Income Qualified Participant Survey Results (Feb. 1, 2022)
- Memo to Ameren IL: 2019 Economic and Employment Impact Analysis (Sept. 13, 2021)
- Ameren Illinois’ Market Effects Pilot – HVAC Market Characterization Report (Sept. 15, 2021)
- Ameren Illinois’ Market Effects Pilot – Heat Pump Hot Water Market Characterization Report (Sept. 15, 2021)
- Ameren IL Empower Communities Study Community Leader Interview Guide (Aug. 2021)
- Diverse Business Development and Customer Engagement in Energy Efficiency: Report produced for Ameren Illinois by Walker-Miller Energy Services and the Urban Energy Justice Lab at the University of Michigan School for Environment and Sustainability (May 2021)
- Memo from Opinion Dynamics to Ameren Illinois: Cognitive Pretest Results of the AIC Income Qualified Participant Non-Energy Impacts Survey (Dec. 4, 2020)
- Memo to Ameren IL: Voltage Optimization CVRf Analysis Results (June 16, 2020)
- Illinois Statewide Residential LED Hours of Use Study Results (December 2017)
- Ameren IL Program Year 2 Customer Survey Questions (Feb. 20, 2009)
- Memo from Opinion Dynamics and Cadmus to Ameren Illinois and ICC Staff regarding AIC Heating and Cooling Program PY5 Dual Replacement Contractor Study (July 22, 2013)
- Memo to Ameren IL: In-Store Intercept Free Ridership Additional Information (May 16, 2013)
- Memo to Ameren Illinois: Evaluation Methods for Combined Heat and Power (April 25, 2013)
- Memo to Ameren IL: Effective Useful Life for Behavioral Programs (March 11, 2013)
- Memo to Ameren IL: Thermostat Assessment for Cooling Savings (Feb. 21, 2013)
- Memo to Ameren IL: 2012 In-Home Lighting Assessment (Feb. 19, 2013)
- Memo to Ameren IL: Residential Nonparticipant Customer Survey Results Memo (Feb. 28, 2017)
- Memo to Ameren IL: HVAC Program - PY7 Incremental Cost Analysis Update (Feb. 3, 2017)
- Memo to Ameren IL: Strategic Energy Management Literature Review Findings (Oct. 2, 2018)
- Small Business Program Ally Memo (Ameren IL)
- Memo to Ameren IL: PY9 Student Energy Efficient Kit Program Household Survey Results (September 4, 2018)
- Ameren IL PY9 Residential Nonparticipant Customer Survey Results Memo (August 14, 2018)
- Illinois Statewide Residential LED Hours of Use Study – Exterior and Specialty Bulb HOU (April 2018)
- Illinois Statewide Residential LED Hours of Use Study – Additional Results (April 2018)
- Memo to Ameren IL: Residential HVAC Metering Study Results (Feb. 28, 2018)
- Memo to Ameren IL and ComEd: Home Energy Report Weather Normalization Study Final Analysis Results (January 22, 2018)
- Memo to Ameren IL: Final Findings from Small Business General Population Survey (Jan. 12, 2018)
- Ameren IL 2018 Behavioral Modification Initiative Persistence Study - Year One (Oct. 21, 2019)
- Ameren IL Smart Thermostat Customer Preference Study Results (Oct. 11, 2019)
- NTG Memo: Appliance Recycling Initiative Participant and Retailer Survey Results (July 31, 2019)
- Memo to Ameren IL: Strategic Energy Management Program Evaluability Assessment (Feb. 6, 2019)
- Memo to Ameren IL: 2018 NEI Baseline Assessment Summary and Findings (Feb. 10, 2020)
- Memo to Ameren Illinois: Literature Review Findings for Negative Non-Energy Impacts (Opinion Dynamics, Feb. 10, 2020)
- Memo to Ameren IL: AIC Income Qualified Initiative, Community Action Agency Interview Findings (Feb. 24, 2020)
- Illinois DSM Portfolio Non-Energy Impacts Economic Analysis (ComEd and Ameren IL)
- Memo to Ameren IL: Income Qualified Initiative Single Family Site Visit Findings (July 10, 2020)
- Memo to Ameren IL: Standard Initiative Small Business Offering 2019 Survey Results (July 9, 2020)
- Memo to Ameren IL: 2019 Ameren Illinois Building Operator Certification Evaluation Lessons Learned (Aug. 24, 2020)
- Memo to Ameren IL: HVAC Initiative Participant Survey and Trade Ally Survey Process Results (Sept. 21, 2020)
- Evaluator Memo: Supporting Documentation for Ameren IL and ComEd Voltage Optimization TRM Measure (Oct. 8, 2020)
Evaluation Research for ComEd
- ComEd CY2024 Societal Non-Energy Impacts Research Report
- Memo from Guidehouse to ComEd: 2024 EE Program Economic Impacts Reporting (May 30, 2025)
- ComEd CY2023 Societal Non-Energy Impacts Research Report
- Memo from Guidehouse to ComEd: CY2023 Energy Efficiency Program Economic and Employment Impacts (June 25, 2024)
- Memo from Guidehouse to ComEd: ComEd CY2022 EE Portfolio Economic and Employment Impacts
- Guidehouse Memo: Deviation to Residential Free Rider Algorithms for Reporting in 2023 – Test Results (Sept. 8, 2023)
- ComEd CY2022 Societal Non-Energy Impacts Research Report
- ComEd Utility Non-Energy Impacts Research Overview (April 19, 2021)
- Memo from Guidehouse to ComEd: CY2019 Energy Efficiency Portfolio Economic and Employment Impacts
- Memo to ComEd: ComEd EUL Research CY2020 Commercial Behavioral and Operations and Maintenance Measures EUL Values Delphi Panel Final Outcomes (Dec. 18, 2020)
- ComEd Advanced Thermostat Evaluation Research Report (Nov. 10, 2020)
- Memo from Guidehouse to ComEd: Small Commercial Thermostats TRM Research (May 26, 2020)
- ComEd Cold Climate Ductless Heat Pump Pilot Final Report (CMC Energy Services, May 7, 2020)
- Memo to ComEd: EUL Research CY2020 Commercial Behavioral Contingent Measures (May 1, 2020)
- Memo from Navigant to ComEd regarding Revenue Neutral Model of Free Ridership (April 23, 2013)
- Memo to ComEd: PY8 Results for the C3 Home Energy Reports Program (Oct. 24, 2016)
- Illinois Statewide Residential LED Hours of Use Study Results (December 2017)
- ComEd Home Energy Report Program Decay Rate and Persistence Study - Year 3 (November 14, 2017)
- ComEd Home Energy Report Program Decay Rate and Persistence Study – Year Five Research Report (Feb. 4, 2020)
- Memo from Navigant to ComEd: Effective Useful Life (EUL) Research for Retrofit Add-on Measures (Jan. 27, 2020)
- Memo from Navigant to ComEd: Effective Useful Life (EUL) Research for LED Street Lighting Measures (Jan. 27, 2020)
- Memo from Navigant to ComEd: Effective Useful Life (EUL) Research for Commercial LED Fixtures (Jan. 27, 2020)
- ComEd Advanced Thermostats Research: 2018 Participant Survey Results (Jan. 21, 2020)
- ComEd Advanced Thermostat Evaluation Research Report (Nov. 2, 2018)
- ComEd and Nicor Gas Air Sealing and Insulation Research Report (Sept. 24, 2018)
- Memo to ComEd: Nest Seasonal Savings Survey Results Memo (June 26, 2018)
- Persistence of Savings from Retro-Commissioning Measures - A field study of past ComEd Retro-Commissioning Projects (Seventhwave, June 13, 2018)
- Persistence of Savings from Retro-Commissioning Measures, a Field Study of Past ComEd Retro-Commissioning Projects by Seventhwave (June 13, 2018)
- Illinois Statewide Residential LED Hours of Use Study – Exterior and Specialty Bulb HOU (April 2018)
- Illinois Statewide Residential LED Hours of Use Study – Additional Results (April 2018)
- Memo to Ameren IL and ComEd: Home Energy Report Weather Normalization Study Final Analysis Results (January 22, 2018)
- Illinois DSM Portfolio Non-Energy Impacts Economic Analysis (ComEd and Ameren IL)
- ComEd PY9 Nest Seasonal Savings Program Combined Evaluation (Feb. 6, 2019)
- Evaluator Memo: Supporting Documentation for Ameren IL and ComEd Voltage Optimization TRM Measure (Oct. 8, 2020)
- ComEd Smart Thermostat Customer Preference Study Results (Oct. 11, 2019)
- Memo from Navigant to ComEd: Effective Useful Life for Retro-Commissioning and Behavior Programs (Sept. 17, 2019)
- ComEd C&I Custom SMART Screening Pilot Report (June 17, 2019)
- ComEd PY9 Heating, Cooling and Weatherization Rebates Program Combined Evaluation (Feb. 14, 2019)
- ComEd PY9 Residential Lighting Discounts Program Combined Evaluation (Feb. 14, 2019)
- ComEd Home Energy Report Program Combined Evaluation (Feb. 6, 2019)
Evaluation Research for Nicor Gas
- Memo from Guidehouse to Nicor Gas: 2023 Energy Efficiency Portfolio Economic Impact Reporting
- Memo from Guidehouse to Nicor Gas: 2022 Energy Efficiency Portfolio Economic Impact Reporting
- Guidehouse Memo: Deviation to Residential Free Rider Algorithms for Reporting in 2023 – Test Results (Sept. 8, 2023)
- NTG Memo: Nicor Gas Residential Non-Participant Spillover Final 2022 Research Results
- Memo from Guidehouse to Nicor Gas: Recommended Non-Energy Impacts for Peoples Gas’ Cost-Effectiveness Tests (Feb. 19, 2021)
- Memo from Navigant to Nicor Gas: GPY2 Evaluation of the Business Performance with Energy Star Pilot (Oct. 4, 2013)
- Memo from Navigant to Nicor Gas: Behavioral Energy Savings Program August 1st Fact Track Evaluation Memo (October 1, 2013)
- Research Report from Navigant to Nicor Gas: PY1 Furnace Metering Study (August 1, 2013)
- Nicor Gas Behavioral Energy Savings Programs: Home Energy Reports Persistence Study Part 2 (April to Sept. 2015)
- ComEd and Nicor Gas Air Sealing and Insulation Research Report (Sept. 24, 2018)
Evaluation Research for Peoples Gas and North Shore Gas
- North Shore Gas 2023 Energy Efficiency Portfolio Economic Impact Reporting
- Peoples Gas 2023 Energy Efficiency Portfolio Economic Impact Reporting
- Memo from Guidehouse to North Shore Gas: 2022 Energy Efficiency Portfolio Economic Impact Reporting
- Memo from Guidehouse to Peoples Gas: 2022 Energy Efficiency Portfolio Economic Impact Reporting
- Guidehouse Memo: Deviation to Residential Free Rider Algorithms for Reporting in 2023 – Test Results (Sept. 8, 2023)
- Memo from Guidehouse to North Shore Gas: Recommended Non-Energy Impacts for North Shore Gas' Cost-Effectiveness Tests (Dec. 17, 2020)
- Memo from Guidehouse to Peoples Gas: Recommended Non-Energy Impacts for Peoples Gas' Cost-Effectiveness Tests (Dec. 17, 2020)