E-22024 DSM Programs Evaluation Reports
80 passages
DEFINITIONS Accuracy Reflects the proximity of measurements to the true value. Net savings Energy or peak demand savings that can be reliably attributed to a program. This includes effects such as free-ridership and spillover that negative...
AI summary The document defines key terms related to energy efficiency and measurement accuracy, including net savings, net-to-gross ratio, non-sampling error, and peak coincidence factor. These definitions are critical for evaluating the effectiveness of energy programs and ensuring accurate measurement of energy savings.
Net-to-gross Ratio Review The evaluation scope included a NTGR review that served to update the NTGR questionnaires and algorithms for the DSM portfolio so that they were consistent across programs and in line with the latest best practice...
AI summary The NTGR review updated algorithms and questionnaires for E1's DSM programs to align with best practices, focusing on self-report methods. It covered rule alignment, weighting, and survey formulation, applicable to 2024 programs and the 2023-2025 DSM Plan period, excluding Instant Savings due to prior data collection.
Net-to-gross Assessment and Net Savings Calculations Free-ridership levels were established for select program components by conducting self-report surveys or in-depth interviews. Those surveys and interviews included a set of questions us...
AI summary The document outlines methods for calculating free-ridership and spillover levels in energy efficiency programs, using surveys and interviews. It details updates for 2024 evaluations, excludes low-income participants due to nil free-ridership, and references NTGR reviews and spillover assessments for various program components.
3.1 Individual Impact Evaluation Results [Table](#page-24-0) 5 and [Table](#page-25-0) 6 below respectively list the evaluated electrical energy and peak demand savings as well as the corresponding savings tracked by E1 for each program co...
AI summary The text discusses the evaluation of electrical energy and peak demand savings for various programs offered in 2024. Net savings are calculated using the net-to-gross ratio (NTGR), and lifetime energy savings are based on the effective useful life (EUL) of efficiency measures. Line loss factors were submitted to the Nova Scotia Utility and Review Board (NSUARB) as part of the 2014 Cost of Service Study Progress Update.
b Subtotal NTGR values represent average values for the Residential and BNI portfolios. The Portfolio Total NTGR value represents an average value for all programs. There were no tracked savings for Residential Behaviour. d Evaluated gross...
AI summary The text discusses the calculation of net-to-gross ratio (NTGR) values for various programs, noting that the Residential and BNI portfolios have average NTGR values. It also mentions the exclusion of Residential Behaviour from net savings calculations due to the absence of tracked savings, and highlights 0.135 GWh of energy savings from the Commercial Direct Install Pilot.
f This net realization rate does not include the DR program. b Subtotal NTGR values represent average values for the Residential and BNI portfolios. The Portfolio Total NTGR value represents an average value for all programs. c Evaluated g...
AI summary The text discusses the evaluation of demand response (DR) program savings, noting that the net realization rate excludes the DR program. It also mentions that tracked results for 2024 were not fully compiled due to varying methodologies for establishing DR capacity. Residential DR was not included in the calculation due to a lack of tracked savings.
Efficient Product Installation - › Compared to 2023 levels, participation in 2024 increased by 2% while average electrical energy savings per participant decreased by 6.3%. This reduction in savings per participant was mainly due to the up...
AI summary Efficient Product Installation (EPI) participation rose 2% in 2024 compared to 2023, but average electrical energy savings per participant fell 6.3% due to 2024-2025 DSM MA updates, particularly reduced smart thermostat and LED lamp savings. Evaluated net electrical energy savings were 6% lower than tracked, while peak demand savings increased 1% due to DSM MA updates and NTGR adjustments.
3.2 Net-to-gross Ratios The NTGRs outlined in [Table](#page-30-1) 7 below were applied to gross savings to estimate net savings. NTGRs were established based on the free-ridership levels and spillover in some cases. Based on the establishe...
AI summary The document discusses the calculation of Net-to-gross Ratios (NTGRs) used to estimate net savings from energy efficiency programs. NTGRs are determined based on free-ridership and spillover levels, using the equation NTGR = (1 - % Free-ridership + % Spillover). The methodology relies on self-reporting and was described in a prior subsection.
APPENDIX III NTGR Calculations This appendix provides an example of net-to-gross ratio (NTGR) calculations. The example details the calculations of participant free-ridership levels and resulting NTGR for EPI LED Bulbs. The Evaluator used...
AI summary This appendix details an example of net-to-gross ratio (NTGR) calculations for EPI LED Bulbs, including participant free-ridership level assessments. The Evaluator applied a similar methodology to other program components, with further details available in individual program evaluation reports.
NTGR Calculations Free-ridership algorithm High Free-ridership Participant Medium Free-ridership Participant purchase and install LED bulbs in your home? 2) No 0% Yes 100% Yes 100% Yes 100%
AI summary The text presents a table related to the NTGR (Net-to-Gross Ratio) calculations, focusing on free-ridership levels for participants in a program that involves purchasing and installing LED bulbs. It categorizes participants into high, medium, and no free-ridership levels with corresponding percentages.
INTRODUCTION EfficiencyOne (E1), an independent, non-profit organization, is responsible for helping Nova Scotians improve the energy efficiency of their homes and workplaces by designing, marketing, and delivering demand-side management (...
AI summary EfficiencyOne (E1), a non-profit organization, manages demand-side management (DSM) programs in Nova Scotia through the Efficiency Nova Scotia (ENS) franchise. E1's 2024 DSM program portfolio includes the Residential Efficient Product Rebates program with components like Appliance Retirement and Instant Savings. Econoler was commissioned to evaluate these programs, focusing on baseline definitions, savings calculations, and net-to-gross ratios.
Table 30: 2024 Instant Savings Spillover Levels Product Category Spillover Level LED Lamps 9% LED Fixtures 2% All Other Products - 7.3.3 Net-to-gross Ratio Calculations
AI summary Table 30 outlines the 2024 Instant Savings Spillover Levels for various product categories, including LED Lamps and LED Fixtures. Section 7.3.3 discusses Net-to-gross Ratio Calculations, indicating a focus on energy efficiency program metrics.
Table 31: 2024 Instant Savings Net-to-gross Ratios Weighted Average Free-ridership Product Category Level Margin of Error Spillover Net-to-gross Ratio LED Lamps 39% 6.8% 9% 0.70 All LED Fixtures 26% 7.6% 2% 0.76 All Other Products 0 0 0 1....
AI summary Table 31 presents the 2024 Instant Savings Net-to-gross Ratios for various product categories, including LED Lamps, All LED Fixtures, and All Other Products. The data includes weighted average free-ridership, margin of error, spillover, and net-to-gross ratios, which are used to evaluate the effectiveness of energy efficiency programs.
Net savings are defined as the changes in energy use that are attributable specifically to Instant Savings. Net program component impacts were estimated by applying the overall NTGR to gross savings, as exemplified in the following equatio...
AI summary Net savings are calculated using the Net-to-Gross Ratio (NTGR) applied to gross savings, resulting in 10,508 tonnes of CO2 eq in annual GHG emission reductions. This calculation includes both net electrical energy and net peak demand savings.
Table 32: Evaluated 2024 Instant Savings Net Energy and Peak Demand Savings LED Non-A-ty /pe Lamps LED Recessed LED ENI ERGY STAR Fixture es . Dimmer Indoor Outdoor Motion Sensors Gross Peak Demand Savings – at the Meter (MW) 0.000 0.000 0...
AI summary Table 32 presents the evaluated 2024 Instant Savings Net Energy and Peak Demand Savings for various energy efficiency measures. The table shows gross and net peak demand savings at the meter and generator levels, along with the net-to-gross ratio (NTGR) and line loss factor for each measure.
4.3 Net Savings The Evaluator determined the net energy and peak demand savings, i.e. the electrical energy and peak demand savings that can be reliably attributed to a program component, by estimating the net-to-gross ratio (NTGR). More p...
AI summary The Evaluator calculated net energy and peak demand savings using the net-to-gross ratio (NTGR), accounting for spillover and free-ridership effects. For AMH, NTGR was set to 1.00 due to negligible free-ridership and spillover impacts from participants' limited budgets for building improvements.
Table 14: 2024 ASFH Evaluation Approach Evaluation Objectives Research Questions Methodology Collect information on program staff, partner, and participant perspectives › How did participants become aware of ASFH? › What are the participan...
AI summary This chunk outlines the evaluation approach for the 2024 Affordable Single-family Homes (ASFH) program, focusing on collecting participant perspectives and calculating gross and net results. It includes survey and interview methods for program evaluation and outlines the use of tools like HOT2000 and the net-to-gross ratio (NTGR) for calculating savings and GHG emission reductions.
9.3 Net Savings The Evaluator determined the net energy and peak demand savings, i.e. the electrical energy and peak demand savings that can be reliably attributed to a program component, by estimating the net-to-gross ratio (NTGR). More p...
AI summary The Evaluator calculated net energy and peak demand savings using the net-to-gross ratio (NTGR), which accounts for spillover and free-ridership effects. For Affordable Single-family Homes (ASFH), these effects were considered nil due to participants being non-profits or low-income housing owners, leading to a NTGR of 1.00.
9.3.1 Evaluated Net Savings Net savings are defined as the changes in energy use that are specifically attributable to ASFH. Since spillover and free-ridership effects were considered nil, the net energy savings are equal to the gross savi...
AI summary Net savings for ASFH are equivalent to gross savings due to nil spillover and free-ridership effects. ASFH exceeded 2024 electrical energy savings targets by 32% and peak demand targets by 100%, as illustrated in Figure 35.
Table 24: Comparison of 2024 ASFH Tracked and Evaluated Savings at the Generator Gross Savings NTGR Net Savings Realization Rate Value Unit Value Value Unit Value Energy Savings Tracked Savings by E1 4.693 GWh 1.00 4.693 GWh 79% Evaluation...
AI summary Table 24 compares 2024 energy and peak demand savings tracked by E1 and evaluated by the Evaluator. Evaluated savings were 21% and 3% lower than tracked savings, primarily due to revised adjustment ratios and updated unitary savings.
14.3 Net Savings The Evaluator determined the net energy and peak demand savings, i.e. the electrical energy and peak demand savings that can be reliably attributed to a program component, by estimating the NTGR. In the case of EPI, the NT...
AI summary The Evaluator calculated net energy and peak demand savings by estimating the NTGR, accounting for free-ridership and participant spillover effects in EPI programs. This approach adjusts for unintended influences on energy savings outcomes.
TG_Res-Products-NTG-Report_FINAL_2021.06.08.pdf) 40 Econoler for E1. Net-to-Gross Ratio Review – Final Report , November 2024. 41 - Illinois Commerce Commission, Illinois Statewide Technical Reference Manual for Energy Efficiency, Version...
AI summary The section references studies and reports on net-to-gross ratio (NTGR) evaluations and free-ridership measurement in energy efficiency programs, citing Econoler, Illinois Commerce Commission, NMR Group, and Guidehouse. These studies analyze savings weighted NTGR results and residential program evaluations.
14.3.3 Net-to-gross Ratio Calculation The NTGR values were calculated using the following equation. $$NTGR = (1 - \% Free-ridership + \% Internal Spillover)$$ Overall NTGR values were calculated using the free-ridership and spillover level...
AI summary The net-to-gross ratio (NTGR) is calculated using a formula that incorporates free-ridership and internal spillover percentages. The overall NTGR values are determined based on participant type, product category, and savings proportions, as outlined in Table 37 from the 2024 evaluation.
Net savings are defined as the energy use reductions that are specifically attributable to EPI. Net savings were estimated by applying the overall NTGR to gross savings as exemplified in the following equation. Net Savings = Gross Savings...
AI summary Net savings are calculated using the net-to-gross ratio (NTGR) applied to gross savings, which represents energy use reductions specifically attributable to the Efficient Product Installation (EPI) program. This method was used to estimate both electrical energy and peak demand savings.
The detailed results per measure are presented in [Table](#page-115-0) 38 below. The net energy savings resulted in 4,225 tonnes of CO2 eq in net annual GHG emission reductions. Table 38: Evaluated 2024 EPI Net Electrical Energy and Peak D...
AI summary The document presents detailed results of energy savings from LED lamp replacements under the 2024 EPI program. It highlights net annual GHG emission reductions of 4,225 tonnes of CO2 eq and provides data on energy and peak demand savings across various product categories and wattages.
Evaluated 2024 EPI Net Electrical Energy and Peak Demand Savings per Measure (Continued) LED Lamps Product Category Nightlights GU10 7 W Replacing 35 W GU10 7 W Replacing 50 W G25 4.5 W Replacing 40 W E12 5 W Chandelier Replacing 40 W Ener...
AI summary The document presents a table evaluating the 2024 EPI (Efficient Product Installation) net electrical energy and peak demand savings per measure, including LED lamps and water-saving devices. The table includes metrics such as gross and net energy savings, NTGR (net-to-gross ratio), line loss factors, and effective useful life for various products.
2024 EPI-Finding: The overall NTGR for EPI value remained stable although per-product NTGR values varied more significantly. An overall NTGR of 0.98 was established for EPI in 2024 for both the evaluated electrical energy and peak demand s...
AI summary The 2024 EPI-Finding reports that the overall NTGR for EPI remained stable at 0.98, matching 2023 levels. Variations in per-product NTGR values were offset: LED lighting's increase balanced smart thermostats for MSHPs' decrease, maintaining stability in overall savings metrics.
Table 63: 2024 HEA Participant Spillover Level Measure Number of Participants Generating Spillover Average Participant Spillover Level All Measures 11 1% 23.3.3 Net-to gross Ratio Calculation
AI summary Table 63 presents data on the 2024 HEA Participant Spillover Level, indicating that 11 participants generated a spillover level of 1% on average. The section also discusses the Net-to-Gross Ratio Calculation, which is relevant to assessing the effectiveness of energy efficiency measures.
Table 64: 2024 HEA NTGR Values Measure Free-ridership Participant Spillover NTGR Energy Efficiency Measures 17% 0.84 Solar PV Measures 26% 1% 0.75 23.3.4 Unconverted Assessment Spillover
AI summary Table 64 provides 2024 HEA NTGR values for Energy Efficiency Measures and Solar PV Measures, showing free-ridership and participant spillover rates. Section 23.3.4 discusses unconverted assessment spillover, which likely relates to the impact of these measures on broader energy efficiency outcomes.
Table 70: 2024 MHEEP Evaluation Approach Evaluation Objectives Research Questions Methodology Calculate gross results › Are the data in the tracking sheet complete, accurate, and consistent? › What are the savings for heating and building...
AI summary The document outlines the evaluation approach for the 2024 MHEEP (Mi'kmaw Home Energy Efficiency Project), focusing on calculating gross and net results through data audits, unitary savings reviews, effective useful life updates, and GHG emission reduction calculations.
27.3.1 Evaluated Net Savings Net savings are defined as the energy savings specifically attributable to MHEEP. Since spillover and freeridership effects were considered nil, the net MHEEP impacts are equal to the gross savings generated by...
AI summary The MHEEP program achieved net energy savings of 0.401 GWh and peak demand savings of 0.481 MW, with no spillover or free-rider effects. It missed its energy target by 35% but exceeded peak demand savings by 189% as shown in Figure 55.
CONCLUSION Table 87 presents the participation levels, net-to-gross ratios (NTGRs), evaluated gross and net savings at the generator, annual greenhouse gas (GHG) emission reductions, as well effective useful life (EUL) values for each prog...
AI summary Table 87 outlines participation levels, net-to-gross ratios, evaluated savings, annual GHG emission reductions, and effective useful life values for various program components and the Existing Residential category.
For peak demand savings: - › The adjustment to the nominal heating capacity used for some mini-split heat pumps, based on values found in the NEEP Cold Climate Air Source Heat Pump Product list. - › The correction of NTGRs for all three-el...
AI summary Adjustments to mini-split heat pump heating capacity using NEEP data and corrections to NTGRs for three-element water heater and domestic hot water timer measures are discussed as part of peak demand savings initiatives.
› For the differences in net energy savings: - › Correction of NTGR and/or line loss factors for some participants that had hardcoded values using outdated parameters instead of formulas - › A deduction of additional participants for uncon...
AI summary The text outlines corrections needed for net energy savings calculations: adjusting NTGR/line loss factors using outdated parameters, addressing unconverted D assessment spillover reversals, and fixing Green Heat savings deductions that incorrectly used gross meter savings instead of net generator savings in EfficiencyOne's tracking sheet.
DEFINITIONS Accuracy Reflects the proximity of measurements to the true value. Net-to-gross ratio The ratio of net energy savings to gross energy savings. Non-sampling error Errors arising during all survey activities other than sampling....
AI summary The document defines key terms related to energy efficiency and measurement accuracy, including net-to-gross ratio, peak coincidence factor, and precision. It outlines how errors in measurement, such as non-sampling and random sampling errors, can affect the accuracy of energy savings data.
[Table](#page-33-1) 2 below presents the participation levels, NTGRs, evaluated gross and net savings at the generator, annual GHG emission reductions, as well EUL values for each service and Efficient Product Rebates as a whole.
AI summary Table 2 outlines participation levels, net-to-gross ratios (NTGRs), evaluated gross and net savings at the generator, annual GHG emission reductions, and effective useful life (EUL) values for each service and Efficient Product Rebates as a whole.
Program Tracked and Evaluated Savings [Table](#page-36-0) 3 below compares E1 tracked electrical energy and peak demand savings to evaluated savings at the generator. It also includes the realization rate, representing the ratio of evaluat...
AI summary Table 3 compares E1 tracked electrical energy and peak demand savings to evaluated savings at the generator, including realization rates and net-to-gross ratios (NTGRs) calculated as the ratio of net savings to gross savings.
Table 3: Comparison of 2024 Tracked and Evaluated Savings at the Generator Gross Savings NTGR Net Savings Realization Rate Value Unit Value Unit Energy Savings Tracked Savings by E1 47.777 GWh 0.81 38.557 GWh 103% Evaluation Results 46.852...
AI summary Table 3 compares 2024 tracked and evaluated energy and peak demand savings by EfficiencyOne (E1) and the evaluation results. It includes gross savings, net-to-gross ratios (NTGR), net savings, and realization rates for both energy and peak demand savings, with notes on differing NTGRs for Application Rebates and Instant Rebates.
INTRODUCTION EfficiencyOne (E1), an independent, non-profit organization, is responsible for helping Nova Scotians improve the energy efficiency of their homes and workplaces by designing, marketing, and delivering demand-side management (...
AI summary EfficiencyOne (E1) is an independent non-profit organization that delivers energy efficiency and demand-side management (DSM) programs in Nova Scotia through the Efficiency Nova Scotia (ENS) franchise. E1's 2024 Efficient Product Rebates program, part of the Business Energy Rebates (BER) component, is being evaluated by Econoler. The evaluation focuses on baseline definitions, savings calculation methodologies, and parameters such as net-to-gross ratios (NTGRs).
4.3.3 Net-to-gross Ratio Calculation The NTGR is calculated using the following equation. $$NTGR = (1 - \% Free-ridership + \% Spillover)$$ Using the free-ridership and spillover levels established for Application Rebates, the Evaluator ca...
AI summary The document discusses the calculation of the Net-to-gross Ratio (NTGR) using the equation NTGR = (1 - % Free-ridership + % Spillover), with values derived from free-ridership and spillover levels established for Application Rebates.
5.3.2 Net-to-gross Ratio The NTGR is calculated using the following equation. $$NTGR = (1 - \% Free-ridership)$$ As presented in [Table](#page-68-1) 23, the NTGRs for the main measure categories were established using the freeridership lev...
AI summary The document discusses the Net-to-gross Ratio (NTGR), which is calculated as (1 - % Free-ridership), and explains how it was applied to different measure categories based on free-ridership levels. A NTGR of 1.00 was used for measures sold through Instant Rebates. It also mentions that 'low' influence and intention scores correspond to low free-ridership levels.
CONCLUSION Table 29 presents the participation levels, net-to-gross ratios (NTGRs), evaluated gross and net savings at the generator, annual GHG emission reductions, as well effective useful life (EUL) values for each service and Efficient...
AI summary Table 29 summarizes participation levels, net-to-gross ratios, evaluated gross and net savings, annual GHG emission reductions, and effective useful life values for each service and Efficient Product Rebates as a whole.
The differences between tracked and corrected peak demand savings at the generator were larger for both the gross and net values with differences of 6% and 7% respectively. These were due to many entries having either inconsistent interact...
AI summary The text highlights discrepancies between tracked and corrected peak demand savings at the generator, with differences of 6% and 7% for gross and net values, respectively. These discrepancies are attributed to inconsistencies in interactive effects factors, peak coincidence factors, unitary demand savings values, and net-to-gross ratios.
DEFINITIONS Accuracy Reflects the proximity of measurements to the true value. Net-to-gross ratio The ratio of net electrical energy savings to gross electrical energy savings. Non-sampling error Errors arising during the course of all sur...
AI summary The text defines key terms related to measurement accuracy, net-to-gross ratio, non-sampling error, and peak coincidence factor, which are important for evaluating energy efficiency programs and their impacts on the electricity system.
The Evaluator determined net energy and peak demand savings, that is, the electrical energy and peak demand savings that can be reliably attributed to a service, by estimating an NTGR. Specifically, the NTGR includes effects such as free-r...
AI summary The Evaluator calculated net energy and peak demand savings for Retrofit projects by estimating the Net-to-Gross Ratio (NTGR), which accounts for free-ridership and spillover effects. Three distinct NTGRs were determined for the three Retrofit project categories, as outlined in Table 13.
Table 13: 2024 NTGR Approach per Retrofit Project Category Retrofit Project Category Number of Projects Completed in 2024 NTGR Methodology Sample Size (Unique Participant Interviews) Regular Retrofit 44 Free-ridership and spillover were me...
AI summary Table 13 outlines the 2024 NTGR (Net-to-Gross Ratio) approach for different retrofit project categories. It includes the number of completed projects, the methodology used for NTGR calculation, and the sample size of participant interviews. The NTGR methodology varies by project category, with some using data from previous evaluations and others relying on new interviews.
3.3.3 Net-to-gross Ratio Calculation The NTGR was calculated using the following equation: NTGR = (1 – % Free-ridership + % Participant Spillover) [Table](#page-192-2) 15 outlines the free-ridership and spillover levels established for Ret...
AI summary The Net-to-Gross Ratio (NTGR) is calculated using the formula NTGR = (1 – % Free-ridership + % Participant Spillover). Table 15 provides free-ridership and spillover levels for Retrofit, along with calculated NTGR values for each project category.
Table 15: Evaluated 2024 Retrofit NTGRs Project Category Free-Ridership Level Spillover Level NTGR Regular Retrofit 15% 0% 0.85 Solar PV 38% 1% 0.63 Compressed Air Leak Audit 16% 0% 0.84 \ Free-ridership and spillover solar projects were n...
AI summary Table 15 presents the evaluated 2024 Net-to-Gross Ratios (NTGRs) for different retrofit projects, including Regular Retrofit, Solar PV, and Compressed Air Leak Audit, along with their respective free-ridership and spillover levels. The data includes notes indicating that 2024 values for Solar PV are based on 2023 evaluations.
3.3.4 Evaluated Net Savings Net savings are defined as changes in energy use that are specifically attributable to Retrofit. Net Retrofit impacts are calculated by applying the NTGR value to gross savings as illustrated in the following eq...
AI summary Net savings from Retrofit projects are calculated using the Net-to-Gross Ratio (NTGR), which is applied to gross savings. The Evaluator adjusted multiyear projects completed in 2024 to ensure net savings align with gross savings multiplied by the appropriate NTGR. The average Effective Useful Life (EUL) was 8.5 years, and the net energy savings resulted in 10,567 tonnes of CO2 eq in annual GHG emission reductions.
Table 17: Comparison of 2024 Retrofit Tracked and Evaluated Savings at the Generator Gross Savings NTGR Net Savings Realization Rate Value Unit Value Value Unit Value Energy Savings Tracked Savings by E1 26.115 GWh 0.79 20.719 GWh 109% Eva...
AI summary Table 17 compares the 2024 retrofit tracked and evaluated savings at the generator, including energy and peak demand savings. Tracked savings by E1 and evaluation results are presented with NTGR values and realization rates, highlighting differences due to true-up adjustments and varying NTGRs applied to project categories.
5.3 Net Savings The NTGR is applied to calculate net savings, that is, the savings that can be reliably attributed to a service. For New Construction, the NTGR was established by considering free-ridership. Spillover was assumed to be zero...
AI summary The NTGR is used to calculate net savings by accounting for free-ridership. For New Construction, spillover was assumed zero due to low nonparticipant spillover, as shown by the 2022 evaluation, leading to no measurement of spillover.
5.3.2 Net-to-gross Ratio Calculation The NTGR is calculated using the following equation: $$NTGR = (1 - \% Free-ridership)$$ [Table](#page-14-0) 21 outlines the free-ridership level established for New Construction along with the calculate...
AI summary The Net-to-Gross Ratio (NTGR) is calculated as (1 - % Free-ridership). Table 21 outlines the free-ridership level for new construction and the corresponding NTGR value, with participant spillover assumed to be nil.
Table 21: Evaluated 2024 New Construction NTGR Projects Fully Claimed in 2024 Free-Ridership Level 28% NTGR 0.72 5.3.3 Evaluated Net Savings
AI summary Table 21 presents the evaluated 2024 new construction net-to-gross ratio (NTGR) with a free-ridership level of 28% and an NTGR of 0.72. This section discusses the evaluated net savings related to the projects fully claimed in 2024.
Net savings represent the savings that can be reliably attributed to a service. For New Construction, net savings are calculated by applying the NTGR value in the following equation: Net Savings = Gross Savings × NTGR The results are liste...
AI summary Net savings are calculated using the Net-to-Gross Ratio (NTGR) applied to gross savings. The average Effective Useful Life (EUL) was determined to be 19.0 years, and the net energy savings resulted in 7,308 tonnes of CO2 eq in annual GHG emission reductions.
Table 22: Evaluated 2024 New Construction Net Energy and Peak Demand Savings Partial Savings Claimed Final Savings for Projects Fully Claimed in 2024 Total Energy Savings Gross Energy Savings – at the Meter (GWh) 6.451 13.720 20.171 NTGR 0...
AI summary Table 22 evaluates the 2024 new construction net energy and peak demand savings, including gross and net savings at the meter and generator, line loss factors, and effective useful life. The table provides detailed breakdowns for partial and fully claimed savings, as well as the net-to-gross ratio (NTGR).
6.3.1 Net-to-gross Ratio Calculation The NTGR was calculated using the following equation: NTGR = (1 – % Free-ridership + % Participant Spillover) [Table](#page-19-1) 26 outlines the free-ridership and spillover levels established for Buil...
AI summary The Net-to-Gross Ratio (NTGR) is calculated using the formula NTGR = (1 – % Free-ridership + % Participant Spillover). Table 26 provides the free-ridership and spillover levels for Building Optimization, along with the resulting NTGR value.
Table 26: Evaluated 2024 Building Optimization NTGR Value for Savings Claimed in 2024 Free-Ridership Level 9% (±7.2%) Participant Spillover Level 0% NTGR 0.91 Free-ridership and spillover levels were not measured in 2024, results from the...
AI summary Table 26 presents the evaluated 2024 Building Optimization NTGR, showing a free-ridership level of 9% (±7.2%) and an NTGR of 0.91. The free-ridership and spillover levels from 2021 were applied since they were not measured in 2024.
Net savings represent the savings that can be reliably attributed to a service. For Building Optimization, net savings are calculated by applying the NTGR value in the following equation: Net Savings = Gross Savings × NTGR The detailed net...
AI summary Net savings for Building Optimization are calculated using the Net-to-Gross Ratio (NTGR), resulting in an average Effective Useful Life (EUL) of 7.9 years and annual GHG emission reductions of 311 tonnes CO2 eq.
11.3.1 Evaluated Net Savings Since spillover and free-ridership effects were considered nil, net SEM impacts are equal to the gross savings generated by the program component. The 2024 SEM net electrical energy and peak demand savings were...
AI summary The 2024 SEM program achieved 4.478 GWh of net electrical energy savings and 0.538 MW of peak demand reductions, exceeding targets by 6% and 14% respectively. These savings corresponded to 2,114 tonnes of annual CO2 eq GHG reductions, with no spillover or free-ridership effects considered.
CONCLUSION Table 35 presents the participation levels, net-to-gross ratios (NTGRs), evaluated gross and net savings at the generator, annual GHG emission reductions, as well effective useful life (EUL) values for each Custom Incentives pro...
AI summary Table 35 outlines participation levels, net-to-gross ratios, evaluated savings, GHG emission reductions, and effective useful life values for Custom Incentives program components and the program overall.
APPENDIX XVI SEM Project Review Protocol The SEM project review protocol used for the 2024 evaluation was the same protocol used in 2023. It includes sections that served to review both bottom-up and top-down approaches that were both used...
AI summary The 2024 SEM Project Review Protocol reused the 2023 protocol, incorporating bottom-up and top-down evaluation approaches. Evaluations involved phone interviews/site visits after reviewing EfficiencyOne digital files, with a net-to-gross ratio (NTGR) of 1.00 from the 2023 evaluation applied to the current DSM cycle.
Table 2 presents the participation levels, net-to-gross ratios (NTGRs), evaluated gross and net savings at the generator, annual GHG emission reductions, as well as effective useful life (EUL) values for the Direct Installation program.
AI summary Table 2 outlines the Direct Installation program's participation levels, net-to-gross ratios, evaluated gross and net savings, annual GHG emission reductions, and effective useful life values at the generator level.
INTRODUCTION EfficiencyOne (E1), an independent, non-profit organization, is responsible for helping Nova Scotians improve the energy efficiency of their homes and workplaces by designing, marketing, and delivering demand-side management (...
AI summary EfficiencyOne (E1) is an independent, non-profit organization responsible for delivering demand-side management (DSM) programs in Nova Scotia through the Efficiency Nova Scotia (ENS) franchise. E1's DSM activities are regulated by the Nova Scotia Utility and Review Board (NSUARB), and it receives funding from Nova Scotia Power (NS Power) ratepayers. The 2024 evaluation report focuses on the Direct Installation program, specifically the Small Business Energy Solutions (SBES) component, using parameters like net-to-gross ratios (NTGRs) from previous evaluations.
CONCLUSION [Table](#page-153-1) 17 below summarizes the participation level, net-to-gross ratios (NTGRs), evaluated gross and net savings at the generator, annual GHG emission reductions, as well effective useful life (EUL) values for Dire...
AI summary The conclusion section references a table summarizing participation levels, net-to-gross ratios, evaluated savings, GHG emission reductions, and effective useful life values for Direct Installation.
APPENDIX V Net-to-Gross Ratio Review
AI summary This appendix reviews the Net-to-Gross Ratio (NTGR), a metric used to evaluate the effectiveness of energy efficiency programs by comparing actual energy savings to projected savings. The analysis considers factors such as program design, participant behavior, and measurement methodologies to assess program performance and compliance with regulatory standards.
EXECUTIVE SUMMARY EfficiencyOne (E1) commissioned Econoler to evaluate E1's 2023-2025 DSM program portfolio. As part of the evaluation scope, E1 asked Econoler to present a review of net-to-gross ratio (NTGR) best practices and update the...
AI summary EfficiencyOne commissioned Econoler to evaluate its 2023-2025 DSM program portfolio, focusing on updating net-to-gross ratio (NTGR) best practices and free-ridership methodologies. The review relied on Uniform Methods Project (UMP) guidelines and regional evaluation protocols, emphasizing consistency across programs using self-report data. Econoler identified areas for maintenance and updates to align with current best practices.
Key Changes - › Averaging the intention and influence scores to calculate free-ridership. This updated approach adopted by several jurisdictions ensures that both variables carry an equal weighting as decision-making factors. Econoler reco...
AI summary Key changes include averaging intention and influence scores for free-ridership calculation, adopting a four-point unbalanced scale for survey clarity, simplifying question wording, and ensuring NTGR consideration using deemed or program-level ratios. Econoler recommends these updates to improve accuracy and participant comprehension in E1 programs.
INTRODUCTION EfficiencyOne (E1), an independent, non-profit organization, is responsible for helping Nova Scotians improve the energy efficiency of their homes and workplaces by designing, marketing, and delivering demand-side management (...
AI summary EfficiencyOne (E1) manages Nova Scotia's demand-side management (DSM) programs, evaluated by Econoler to align net-to-gross ratio (NTGR) algorithms and free-ridership questionnaires with best practices. The review focuses on self-report methods for DSM programs, excluding non-participant spillover effects, and updates algorithms for EPI and BER-Instant Rebates.
7 Net-to-gross Ratio (NTGR) Methodology This section documents best practices and recommendations with respect to NTGR calculations, NTGR methodology, algorithm design, free-ridership (FR) and participant spillover (SO) scoring, consistenc...
AI summary This section outlines best practices for calculating the Net-to-Gross Ratio (NTGR), including algorithm design, free-ridership (FR) and participant spillover (SO) scoring, consistency checks, and study design methodologies for regulatory evaluations.
7.1 NTGR Algorithm
AI summary Section 7.1 discusses the NTGR (Net-to-Gross Ratio) algorithm, a method for evaluating demand-side management (DSM) program effectiveness. It focuses on quantifying the ratio of net benefits to gross costs, influencing cost recovery mechanisms and program evaluation frameworks within regulatory proceedings.
7.1.1 The Net-to-gross Ratio Calculation The NTGR is applied to a program to ensure the savings being attributed to the given program would not have happened naturally without the intervention of the program. It is best practice across all...
AI summary The Net-to-Gross Ratio (NTGR) ensures program savings are not naturally occurring. Best practices include evaluating free-ridership and spillover effects through self-reporting tools. The calculation formula is referenced but not detailed in this section.
Spillover Score Components Spillover is a component of the NTGR aimed at capturing further positive effects and is generally added to a questionnaire after free-ridership questions. The spillover series of questions is aimed at capturing o...
AI summary Spillover Score Components under NTGR aim to capture energy efficiency actions beyond free-ridership, improving NTGR if attributable to programs. Table 367 provides UMP definitions for spillover types.
Options for Combination Methods in Multi-measure Programs If there are many measures in a program and the decision is made to include only the measures/measure categories with the highest proportion of savings in the NTGR survey questionna...
AI summary The text outlines approaches for assigning NTGR values to measures excluded from multi-measure programs, including using historic data or other measures' NTGR. It notes average savings for prescriptive measures and technical quantification for accuracy, emphasizing methodological considerations in program design.
Question Design - › Use simple words and avoid technical terms and slang - › Use specific, clear wording rather than general, abstract terms - › Use words that can be interpreted in only one way to avoid ambiguity - › Use question wording...
AI summary The document outlines principles for designing effective survey questions in regulatory proceedings, emphasizing clarity, neutrality, and methodological rigor. It references academic studies and frameworks like the Uniform Methods Project for evaluating energy efficiency programs, billing analysis, and free ridership estimation.
8 Analysis of E1's NTGR Approach This section provides an overview of E1's current NTGR approach particularly as it relates to measures included in the NTGR calculation and spillover. An overview is presented on how the NTGR approach shoul...
AI summary This section reviews E1's current NTGR approach, focusing on measures included in the calculation and spillover effects. It evaluates whether the approach should be updated based on best practices, emphasizing the need for alignment with regulatory standards and program effectiveness.
8.1 Review of E1's Current Approach [Table](#page-17-0) 369 below outlines for each program component, the NTGR results, what measures or sub-categories are included in the NTGR, the current type of spillover measured and the last date the...
AI summary This section reviews E1's current approach, focusing on the Net-to-Gross Ratio (NTGR) results for various program components. It outlines the spillover effects measured, the last update dates, and proposed changes for the 2024 Evaluation. Programs targeting low-income participants use a deemed NTGR ratio of 1.
Table 369: Summary of E1's Current NTGR Approach Program Component Measures for Which FR Is Established Year of Last FR Update Current Spillover Methodology Year of Last Spillover Update Proposed Changes GH FR determined for all measures....
AI summary Table 369 outlines E1's current approach to Net-to-Gross Ratio (NTGR) for free-ridership (FR) and spillover. FR is established for all measures, with NTGR categorized by type. Spillover methodology is not currently applied due to limited opportunities. A proposed change involves collecting additional information on spillover for completeness.
Table 373: Instant Rebates Distributor Influence Level Algorithm Current Algorithm Adjusted Algorithm 98/99) Don't know/Refused EMPTY Influence Score 3 (IS3) IF IS3>70% & IS1<30% OR Inconsistency Test IF IS3<30% & IS1>70%: IF IS2>70% & IS1...
AI summary Table 373 outlines the Instant Rebates Distributor Influence Level Algorithm, comparing the current and adjusted algorithms. It includes influence scores (IS1, IS2, IS3), inconsistency tests, and calculations involving B5 and the Net-to-Gross Ratio (NTGR). The table focuses on how influence levels are determined and adjusted.
G-Report_FINAL_2021.06.08.pdf)[PRODNTG\_Res-Products-NTG-Report\_FINAL\_2021.06.08.pdf.](https://www.ma-eeac.org/wp-content/uploads/MA20X04-E-PRODNTG_Res-Products-NTG-Report_FINAL_2021.06.08.pdf) NMR Group, Inc and DNV for Massachusetts Pr...
AI summary The document references multiple reports and memoranda related to energy efficiency program methodologies, focusing on Net-to-Gross Ratios (NTGR) for fuel-switching heat pumps and residential self-report measurement updates. Key entities include NMR Group, DNV, Tetra Tech, and Massachusetts Program Administrators, emphasizing standardized evaluation approaches for energy savings.
April 2016). Gross Savings and Net Savings: Principles and Guidance. [https://neep.org/gross-and-net-savings-principles-and-guidance.](https://neep.org/gross-and-net-savings-principles-and-guidance) PWP, Inc Evergreen Economics for Energy...
AI summary The text lists references to energy efficiency studies and guidelines, including methodologies for evaluating free ridership, spillover effects, and net-to-gross ratios in rebate programs. Sources include reports from organizations like Synapse Energy Economics and the New Jersey BPU.