The memos on this page include final Net to Gross (NTG) research prepared by independent evaluators beginning in 2018, organized by utility. NTG research memos are organized by the year research was completed.
Ameren Illinois NTG Research
2025 NTG Update Process (for 2026 program year)
- NTG Memo: 2024 Statewide Midstream Commercial Food Service Program Net-to-Gross (NTG) Research Results – Final
- NTG Memo: Ameren Illinois 2024 Business Program Small Business Direct Install Channel Participant Free Ridership Results
2024 NTG Update Process (for 2025 program year)
- NTG Memo: Ameren Illinois 2024 Retail Products Initiative Net-to-Gross Findings
- NTG Memo: Ameren Illinois Virtual Commissioning (TM) Channel Net-to-Gross Results
- NTG Memo: Ameren Illinois 2024 Midstream HVAC Channel Initiative Net-to-Gross Findings
- NTG Memo: Ameren Illinois Small Business Direct Install Channel Trade Ally Spillover Results
- NTG Memo: Ameren Illinois 2024 Business Program Custom Initiative Net-to-Gross Research
- NTG Memo: Ameren Illinois 2023 Business Standard Initiative – Participant Free Ridership Research
2023 NTG Update Process (for 2024 program year)
- NTG Memo: Ameren Illinois Market Rate Multifamily NTGR Survey Results
- NTG Memo: Ameren Illinois Standard Initiative Trade Ally Spillover Results
- NTG Memo: NTG Updates for the Retail Products Initiative – Efficient Choice Tool Channel
- NTG Memo: Ameren Illinois Nonresidential Nonparticipant Spillover Research Results
- NTG Memo: Ameren Illinois 2023 Business Midstream Initiative – Lighting Channel Net-to-Gross Research
- NTG Memo: Ameren Illinois 2023 Market Rate Single Family Initiative – Midstream HVAC Channel NTG Research
- NTG Memo: Ameren Illinois 2023 Business Midstream Initiative – HVAC Channel NTG Research
2022 NTG Update Process (for 2023 program year)
2021 NTG Update Process (for 2022 program year)
- NTG Memo: Updated Instant Incentives Net-to-Gross Ratios (Ameren IL)
- NTG Memo: Updated Custom Initiative Net-to-Gross Ratios (Ameren IL)
2020 NTG Update Process (for 2021 program year)
- NTG Memo: Appliance Recycling Initiative Participant Survey Results – 2019 and 2020 (Ameren IL)
- NTG Memo: Updated Ameren IL Retro-Commissioning Net-to-Gross Ratios (2019 and 2020)
- NTG Memo: Participant Survey NTG and Process Findings for 2020 Retail Products Initiative (Ameren IL)
- NTG Memo: Updated Ameren Illinois Small Business Direct Install NTG Ratio
2019 NTG Update Process (for 2020 program year)
- NTG Memo: 2019 HVAC Initiative Net-to-Gross Research (Ameren IL)
- NTG Memo: 2019 Online Store NTG Results (Aug. 24, 2020)
- NTG Memo: Appliance Recycling Initiative Participant Survey Results – 2019 and 2020 (Ameren IL)
- NTG Memo: Updated Ameren IL Retro-Commissioning Net-to-Gross Ratios (2019 and 2020)
- NTG Memo: 2019 Ameren Illinois Streetlighting NTG Research Findings
2018 NTG Update Process (for 2019 program year)
- NTG Memo: AIC Retail Products Initiative Participant Survey – Variable-Speed Pool Pump Findings and Recommendations (Ameren IL)
- NTG Research Memo: Appliance Recycling Initiative Participant and Retailer Survey Results (Ameren Illinois)
- NTG Research Memo: Updated AIC Standard Core and Small Business Direct Install Net-to-Gross Ratios
- NTG Research Memo: Ameren Illinois Business Program Cross-Cutting Evaluation Activities: Non-Participant Survey Results
- NTG Research Memo: 2018 Multifamily Initiative Tenant and Property Manager Survey NTGR Results (Ameren Illinois)
ComEd NTG Research
2025 NTG Update Process (for 2026 program year)
- NTG Memo: 2024 Statewide Midstream Commercial Food Service Program Net-to-Gross (NTG) Research Results – Final
- NTG Memo: Net-to-Gross Research Results for the ComEd Custom Program
- NTG Memo: ComEd Single Family Upgrades Market Rate CY2025
- NTG Memo: ComEd Retail Online Spray Foam Insulation 2025 Net-to-Gross Research Results
- NTG Memo: ComEd Retail Online Appliance Rebate Component Net-to-Gross Research Results
- NTG Memo: ComEd Product Distribution CY2025 NTG Research, Elementary Energy Education Market Rate Kits
- NTG Memo: ComEd Instant Discounts 2025 Net-to-Gross Research Results
- NTG Memo: ComEd Electric Homes New Construction Participant Free Ridership Survey Results
2024 NTG Update Process (for 2025 program year)
- NTG Memo: Net-to-Gross Research Results for the IL Coordinated Retro-Commissioning Program
- NTG Memo: Net-to-Gross Research Results for the ComEd Custom Program and Data Center Subprogram – Final
- NTG Memo: ComEd Net-to-Gross Research Results for the Industrial Systems Program
- NTG Memo: Net-to-Gross Research Results for the ComEd Incentives – Standard Program
2023 NTG Update Process (for 2024 program year)
- NTG Memo: Combined Utility Non-Residential New Construction (ComEd, Nicor Gas, PG & NSG)
- NTG Memo: Net-to-Gross Research Results for the ComEd Instant Discounts Program (ComEd)
- NTG Memo: Net-to-Gross Research Results for the ComEd Custom Program and Data Center Subprogram (ComEd)
- NTG Memo: Multifamily Upgrades Program, Market Rate (MFMR) Component Net-to-Gross Research (ComEd)
- NTG Memo: Retail Online Program, Appliance Rebate Component Net-to-Gross Research Results (ComEd)
- NTG Memo: Net-to-Gross Research Results for the ComEd Small Business Program (ComEd)
- NTG Memo: 2022 Contractor/Midstream Rebates Program, Free-Ridership, Spillover and NTG Research Results (ComEd)
2022 NTG Update Process (for 2023 program year)
2021 NTG Update Process (for 2022 program year)
- NTG Memo: Commercial Food Service Equipment Pilot for 2020 and 2021 (ComEd)
- NTG Memo: Net-to-Gross Research Results for Single Family Assessment Program (ComEd)
- NTG Memo: Net-to-Gross Research Results for the Industrial Systems Program (ComEd)
- NTG Memo: Research Results for the Instant Discounts Program (ComEd)
- NTG Memo: Research Results for the Combined Utility Non-Residential New Construction Program
- NTG Memo: Research Results for Small Business Kits Program (ComEd)
- NTG Memo: Virtual Commissioning 2019-2020 Participant Survey Results (ComEd)
- NTG Memo: Illinois Coordinated RCx Research Results
- NTG Memo: ComEd CY2021 Elementary Energy Education: Results of Secondary Research on NTG Ratios for Free Kit LEDs and Vouchers for Free LEDs
- NTG Memo: Electric Homes New Construction Pilot for 2021 (ComEd)
2020 NTG Update Process (for 2021 program year)
2019 NTG Update Process (for 2020 program year)
2018 NTG Update Process (for 2019 program year)
- NTG Memo: Results for ComEd Multi-Family Market Rate Program PY9 and CY2018
- NTG Memo: Results for the ComEd Weatherization Rebates Program PY9 and CY2018
- NTG Memo: ComEd CY2018 Pilot Programs’ Net-to-Gross Values
- NTG Memo: Results for the ComEd Custom Program CY2018
- NTG Memo: Results for the ComEd Data Centers Program CY2018
- NTG Memo: ComEd Fridge & Freezer Recycling Program CY2018
- NTG Memo: ComEd CY2018 Heating and Cooling Rebate Program Free Ridership Research Results
- NTG Memo: Results for the ComEd LED Street Light Offer CY2018
- NTG Memo: Results for ComEd Multi-Family Market Rate Program PY9 and CY2018
- NTG Memo: Results for the ComEd Small Business Offer CY2018
- NTG Memo: Results for the ComEd Weatherization Rebates Program PY9 and CY2018
- NTG Memo: Weighting Gas Utility and ComEd Small Business Service Provider and Participant Free Ridership using the TRM Version 7.0 Protocol
Nicor Gas NTG Research
2025 NTG Update Process (for 2026 program year)
- NTG Memo: 2024 Statewide Midstream Commercial Food Service Program Net-to-Gross (NTG) Research Results – Final
- NTG Memo: Nicor Gas Business Energy Efficiency Rebates (BEER) NTG Survey Research Results
- NTG Memo: Nicor Gas Custom Incentives NTG Survey Research Results
- NTG Memo: NTG Recommendations for Nicor Gas Energy Savings Kits
- NTG Memo: NTG Research Results for Nicor Gas Home Energy Efficiency Rebates Participant & Trade Ally Free Ridership and Spillover Surveys
- NTG Memo: Nicor Gas Home Energy Savings NTG Research Results for Participant & Trade Ally Free Ridership Survey
- NTG Memo: Recommended NTG Value for Nicor Gas Residential New Construction Program
- NTG Memo: Nicor Gas Small Business Program NTG Survey Research Results
2024 NTG Update Process (for 2025 program year)
- NTG Memo: Net-to-Gross Research Results for the IL Coordinated Retro-Commissioning Program
- NTG Memo: Nicor Gas Home Energy Savings Participant and Trade Ally Spillover Research Results
- NTG Memo: Net-to-Gross Research Results for the Nicor Gas Multi-Family Property Manager and Trade Ally Free Ridership and Spillover Surveys
2023 NTG Update Process (for 2024 program year)
- NTG Memo: Combined Utility Non-Residential New Construction (ComEd, Nicor Gas, PG & NSG)
- NTG Memo: Non-Residential Nonparticipant Spillover Research Results (Nicor Gas)
- NTG Memo: Home Energy Savings Program (including Advanced Thermostat) 2022- 2023 Free Ridership and Spillover Net-to-Gross Research Results (Nicor Gas)
2022 NTG Update Process (for 2023 program year)
2021 NTG Update Process (for 2022 program year)
- NTG Memo: Research Results for the Combined Utility Non-Residential New Construction Program
- NTG Memo: Illinois Coordinated RCx Research Results
- NTG Memo: Nicor Gas Custom Program 2020 NTG Research Results
- NTG Memo: Nicor Gas Energy Saving Kits Program 2020 NTG Research Results
- NTG Memo: Nicor Gas Small Business 2020 NTG Research Results
2020 NTG Update Process (for 2021 program year)
2019 NTG Update Process (for 2020 program year)
2018 NTG Update Process (for 2019 program year)
- NTG Memo: Results from GPY6 and CY2018 for the Nicor Gas Home Energy Savings Program
- NTG Memo: Results for Nicor Gas BEER Program 2018: Steam Trap and Non-Steam Trap Measures
- NTG Memo: Results from GPY6 and CY2018 for the Nicor Gas Home Energy Savings Program
- NTG Memo: Nicor Gas Steam Trap 2018 Findings
- NTG Memo: Research Results from 2018 and 2019 Nicor Gas Home Energy Efficiency Rebates Program
- NTG Memo: Weighting Gas Utility and ComEd Small Business Service Provider and Participant Free Ridership using the TRM Version 7.0 Protocol
Peoples Gas & North Shore Gas NTG Research
2025 NTG Update Process (for 2026 program year)
- NTG Memo: 2024 Statewide Midstream Commercial Food Service Program Net-to-Gross (NTG) Research Results – Final
- NTG Memo: NTG Recommendation for Peoples Gas and North Shore Gas Epic Savers Kit Program
- NTG Memo: NTG Recommendations for Peoples Gas and North Shore Gas Gas Optimization Program
- NTG Memo: Peoples Gas and North Shore Gas Home Energy Rebates Participant & Trade Ally Free Ridership and Spillover Survey Results
- NTG Memo: Peoples Gas and North Shore Gas Multi-Family Property Manager & Trade Ally Free Ridership and Spillover Survey Results
- NTG Memo: Peoples Gas and North Shore Gas Small Business Program NTG Survey Research Results
- NTG Memo: Peoples Gas and North Shore Gas C&I Prescriptive Program NTG Survey Research Results
2024 NTG Update Process (for 2025 program year)
- NTG Memo: Net-to-Gross Research Results for the IL Coordinated Retro-Commissioning Program
- NTG Memo: Peoples Gas and North Shore Gas Commercial Custom Net-to-Gross Participant Free Ridership and Spillover Survey
2023 NTG Update Process (for 2024 program year)
- NTG Memo: Combined Utility Non-Residential New Construction (ComEd, Nicor Gas, PG & NSG)
- NTG Memo: Non-Residential Nonparticipant Spillover Research Results (PG & NSG)
- NTG Memo: Advanced Thermostat 2022-2023 Free Ridership Research Results (PG & NSG)
- NTG Memo: Home Energy Jumpstart Program 2022-2023 Net-to-Gross Research Results (PG & NSG)
- NTG Memo: Multi-family Program Partner Trade Ally 2022 Spillover Research Results (PG & NSG)
- NTG Memo: Residential Nonparticipant Spillover Final 2023 Research Results (PG & NSG)
2022 NTG Update Process (for 2023 program year)
- No NTG research.
2021 NTG Update Process (for 2022 program year)
- NTG Memo: Small and Midsize Business 2020 NTG Research Results (PG & NSG)
- NTG Memo: 2019-2020 Gas Optimization Participant Net-to-Gross Survey Results (PG & NSG)
- NTG Memo: Public Sector Custom and Prescriptive 2019-2020 Participant Net-to-Gross Survey Results (PG & NSG)
- NTG Memo: Research Results for the Combined Utility Non-Residential New Construction Program
- NTG Memo: Illinois Coordinated RCx Research Results
2020 NTG Update Process (for 2021 program year)
- No NTG research.
2019 NTG Update Process (for 2020 program year)
- NTG Memo: NTG Research Results for PG & NSG Business Prescriptive Program – 2018 and 2019
- NTG Memo: Research Results from 2018 and 2019 for the PG & NSG Home Energy Rebate Program
2018 NTG Update Process (for 2019 program year)
- NTG Memo: Results for the Market Rate Multi-Family Program for Nicor Gas, Peoples Gas, and North Shore Gas GPY6 and CY2018
- NTG Memo: PG & NSG CY2018 Gas Optimization Program Research Results
- NTG Memo: PG & NSG Custom Program CY2018 Custom Rebate Program Free Ridership, Spillover and NTG Research Results
- NTG Memo: Weighting Gas Utility and ComEd Small Business Service Provider and Participant Free Ridership using the TRM Version 7.0 Protocol
- Multi-Family Program (PG & NSG)
- NTG Memo: NTG Research Results for PG & NSG Business Prescriptive Program – 2018 and 2019
- NTG Memo: Research Results from 2018 and 2019 for the PG & NSG Home Energy Rebate Program
NTG Research from Electric Program Year 9 / Gas Program Year 6
- NTG Memo: Coordinated Utility Results from the EPY9/GPY6 Non-Residential New Construction Program
- NTG Memo: Results from EPY9/GPY6 for the Coordinated Utility Retro-Commissioning Program