E-52018 DSM Evaluation Reports
61 passages
Executive Summary 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 negatively or positively affect the savings attributable to a progr...
AI summary The document defines key terms related to energy program evaluation, including net savings, net-to-gross ratio, peak demand savings, and tracked savings. It also outlines statistical and measurement concepts such as precision, sampling error, and secondary market impacts.
1 EVALUATION OBJECTIVES AND SCOPE The objectives of the 2018 evaluation of ENS DSM program components were to: - › Assess the effectiveness of program component design and delivery - › Determine the extent to which program component implem...
AI summary The 2018 evaluation of ENS DSM program components aimed to assess the effectiveness of program design and delivery, determine implementation progress, calculate energy and peak demand savings, and analyze market evolution of LED lamps and mini-split heat pumps. Table 1 outlines evaluated programs, their components, and evaluation types.
3 IMPACT EVALUATION RESULTS This section presents an analysis of the impact evaluation results for all program components by comparing the 2018 tracked energy and peak demand savings with those evaluated. The evaluated netto-gross ratios,...
AI summary This section compares 2018 tracked energy and peak demand savings with evaluated results, presenting netto-gross ratios, lifetime energy savings, and GHG emission reductions. The analysis focuses on program performance metrics and their environmental impacts.
3.1 Individual Impact Evaluation Results Table 5 and Table 6 below summarize the evaluated energy and peak demand savings as well as the corresponding savings tracked by ENS for each program component offered in 2018. For evaluated energy...
AI summary This section presents the results of individual impact evaluations for energy and peak demand savings from programs offered in 2018. It distinguishes between initial gross savings, adjusted gross savings, and net savings calculated using the net-to-gross ratio. Lifetime energy savings are also outlined based on the effective useful life of the efficient measures.
Instant Savings In 2018, 669,550 products were sold through Instant Savings which represents fewer sales than in 2017. Although the overall savings achieved by Instant Savings in 2018 were higher than in 2017, due to higher average savings...
AI summary In 2018, Instant Savings sold 669,550 products, with LED A-type lamps being the most popular. Despite fewer sales than in 2017, overall savings increased due to higher average savings per product. Net electrical energy savings were 21.930 GWh and net peak demand savings were 2.572 MW. Evaluated savings were higher than tracked savings due to adjustments in unitary savings and increased spillover levels.
Green Heat The 2018 Green Heat participation level was much higher than in previous years with 3,055 measures installed. MSHPs were still the most popular measure, accounting for 92 percent of measures installed. The Evaluator found that t...
AI summary In 2018, the Green Heat program saw high participation with 3,055 measures installed, primarily mini-split heat pumps. The program achieved significant energy and peak demand savings. However, evaluated net energy and peak demand savings were lower than tracked values due to a decrease in the net-to-gross ratio (NTGR) and differences in participant selection processes.
Efficient Product Installation In 2018, Efficient Product Installation achieved 12.777 GWh in net electrical savings and 1.463 MW in net peak demand savings. In total, 10,813 households participated in Efficient Product Installation in 201...
AI summary In 2018, the Efficient Product Installation program achieved 12.777 GWh in net electrical savings and 1.463 MW in net peak demand savings, with 10,813 households participating. Participation declined due to fewer potential participants, but ENS offered incentives like free clotheslines and LED holiday lights to encourage participation. Savings were slightly lower than tracked values due to adjustments in unitary savings and NTGR.
New Home Construction A total of 652 participants completed projects and generated electrical savings under New Home Construction in 2018, including seven participants who completed a project through the Passive House pilot. Combined, New...
AI summary In 2018, 652 participants in the New Home Construction program achieved significant energy and peak demand savings, with Passive House pilot participants contributing as well. However, evaluated savings were 3% lower than tracked values due to updated overestimation ratios. The net-to-gross ratio (NTGR) for regular participants increased from 0.90 to 0.95, while Passive House participants saw a drop from 0.90 to 0.39.
Business Energy Rebates Business Energy Rebates delivers incentives through two services, namely Mail-in and Instant Rebates. In 2018, a total of 366 Mail-in projects were implemented by 257 unique participants. For Instant Rebates, a tota...
AI summary Business Energy Rebates delivers incentives through Mail-in and Instant Rebates. In 2018, the program achieved significant energy and peak demand savings, but evaluated savings were lower than tracked values due to adjustments in gross savings and a slight decrease in the net-to-gross ratio.
Custom In 2018, the suite of services offered through Custom was broken down as follows: Retrofit; New Construction; and Building Optimization. Overall, 79 projects generated savings, 69 of which were completed. The Evaluator determined th...
AI summary In 2018, Custom's services generated 11.603 GWh in net electrical energy savings and 1.200 MW in net peak demand savings. However, evaluated gross energy savings were 13% below the tracked value due to significant reductions in New Construction and Building Optimization. The NTGR was revised downward, with peak demand savings decreasing by 31% below the tracked value.
Energy Management Information Systems Two participants generated savings in 2018; one was a continuing participant that began with Energy Management Information Systems in 2015 and the other was a new participant that reported savings thro...
AI summary In 2018, Energy Management Information Systems achieved 1.616 GWh in net electrical energy savings and 0.051 MW in net peak demand savings. Discrepancies in tracked savings were noted due to minor changes in calculation methods and incorrect tracking by ENS for a new project. Adjustments were made using the NTGR, which was equal to 1 for this program component.
3.2 Net-to-gross Ratio The NTGRs, outlined in Table 5 and Table 6 above, were applied to the gross savings to estimate net savings. NTGRs were established based on the levels of free-ridership and, in some cases, spillover. NTGR estimation...
AI summary This section discusses the calculation of the net-to-gross ratio (NTGR) used to estimate net savings from energy efficiency programs. The NTGR accounts for free-ridership and spillover effects, with free-ridership levels determined through surveys and interviews. Spillover was assessed by evaluating additional energy efficiency measures taken by participants and market effects for specific programs like Instant Savings and New Home Construction.
Free-ridership levels for LED products, which are offered across several program components and represent most of 2018 energy savings, remained high in 2018. This result is discussed in Section 5 below, entitled Market Evolution. b Net-to-...
AI summary Free-ridership levels for LED products remained high in 2018, contributing significantly to energy savings. Net-to-gross ratios were determined based on past evaluations, as discussed in Section 5.
APPENDIX III NTGR CALCULATIONS This appendix provides some examples to illustrate the Evaluator's calculations of free-ridership, participant spillover and net-to-gross ratio values in the 2018 evaluation. To demonstrate how to apply the a...
AI summary This appendix provides examples of free-ridership, participant spillover, and net-to-gross ratio calculations from the 2018 evaluation, using the EPI program component and Custom Retrofit service as examples. Similar methods were applied to other program components, with more details available in individual program evaluation reports.
6.2 Fo llow-up on 2017 Evaluation Report Recommendations 33 Table 3: Comparison of ARet Tracked and Evaluated Savings at the Generator xiv Table 4: Instant Savings Net-to-gross Ratio xvii Table 5: Comparison of Instant Savings Tracked and...
AI summary The text presents a table of contents with various tables related to the evaluation of energy efficiency programs, including appliance retirement (ARET), instant savings, and the implementation status of recommendations from a 2017 evaluation report. The tables cover tracked and evaluated savings, survey sample sizes, energy consumption values, and rebate listings.
ARet Energy Savings For the 2018 evaluation, the Evaluator revised the unitary savings values of appliances retired through ARet and HomeWarming using a methodology similar to that used in previous evaluations, except that induced consumpt...
AI summary The 2018 evaluation of ARet Energy Savings revised unitary savings values for retired appliances, using 2017 metering data due to inconsistencies in 2018 data. Net unitary savings for refrigerators and freezers decreased, while those for air conditioners and small appliances increased. The equivalent net-to-gross ratio (NTGR) was calculated using updated free-ridership and spillover values.
Table 2: ARet Equivalent Net-to-gross Ratios Gross Savings Effe ects Net Unitary Savings (kWh) Appliance Type Number of Units Consumption of Retired Appliances (kWh) Free- ridership (kWh) Secondary Market Impact (kWh) Participant Spillover...
AI summary The table presents the Net-to-Gross Ratios (NTGR) for various appliance types replaced through the HomeWarming program, showing the relationship between gross savings and net unitary savings. A NTGR of 1 was assumed for HomeWarming due to its direct replacement nature and participant demographics.
Table 4: Instant Savings Net-to-gross Ratio Product Category Free-ridership Spillover NTGR LED Lamps 39% 25% 0.86 All Other Products - - 1.00 In 2018, Instant Savings generated 21.930 GWh in net energy savings and 2.572 MW in net peak dema...
AI summary Table 4 presents the Instant Savings Net-to-gross Ratio (NTGR) for different product categories, with LED lamps having an NTGR of 0.86 and all other products having an NTGR of 1.00. In 2018, Instant Savings achieved 21.930 GWh in net energy savings and 2.572 MW in net peak demand savings at the generator.
4.7 Appliances Replaced Through HomeWarming This subsection summarizes the methodology used and the calculations made to determine the unitary savings of refrigerators, freezers and dehumidifiers replaced through HomeWarming in 2018. HomeW...
AI summary This section outlines the methodology used to calculate the unitary savings from replacing old appliances through the HomeWarming program in 2018. The program targets income-eligible participants and requires appliances to be manufactured in 1994 or earlier. A net-to-gross ratio (NTGR) of 1.00 was assumed due to the program's direct replacement approach and participant demographics.
9.2 Net-to-gross Ratio The NTGR serves to determine net savings, i.e. the energy savings that can be reliably attributed to a program component. More precisely, the NTGR represents the positive or negative impacts of freeridership and spil...
AI summary The Net-to-gross Ratio (NTGR) is used to determine net savings by accounting for free-ridership and spillover effects on gross savings. For Instant Savings, the ratio considers LED lamps, the best-selling product category, which accounts for 69% of total tracked gross savings.
9.2.3 NTGR Calculation The NTGR is calculated using the following equation: $$NTGR = (1 - \% \text{ free-ridership} + \% \text{ spillover})$$ Using this equation, the NTGR for LED lamps was estimated at 0.86. For all other products, a NTGR...
AI summary The NTGR is calculated using an equation that accounts for free-ridership and spillover effects. For LED lamps, the NTGR was estimated at 0.86, while a NTGR of 1.00 was used for all other products due to the difficulty in assessing free-ridership and spillover for non-LED products.
9.3 Net Savings 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 presented above to the gross savings, as...
AI summary Net savings from the Instant Savings program are calculated using the Net-to-Gross Ratio (NTGR) applied to gross savings. This resulted in 21.930 GWh in net energy savings and 2.572 MW in net peak demand savings. These savings are estimated to avoid 13,434 tonnes of CO2 eq annually, based on Nova Scotia's specific GHG emissions factor.
Table 40: Evaluated Net Energy and Peak Demand Savings by Product Category for Instant Savings LED A- LED Non-A-t ype Lamp LED LED ENER Dimmer Indoor Motion Sensor Outdoor Power Product Category type Lamp R, BR and Decorative Other Recesse...
AI summary Table 40 presents evaluated net energy and peak demand savings by product category for the Instant Savings program. It includes metrics such as energy savings, net-to-gross ratio (NTGR), line loss factor, and net lifetime energy savings for various lighting and control products.
EXECUTIVE SUMMARY This report presents the 2018 demand-side management (DSM) evaluation results of the Existing Residential program operated by Efficiency Nova Scotia (ENS). This program is comprised of four components: (1) Home Energy Ass...
AI summary This report evaluates the 2018 demand-side management (DSM) results of the Existing Residential program by Efficiency Nova Scotia (ENS), which includes four components: Home Energy Assessment, Green Heat, Efficient Product Installation, and a First Nations Home Energy Efficiency Pilot. Table 1 provides participation levels, net-to-gross ratios, and evaluated savings for each component and the program overall.
HEA Energy Savings The objective of the 2018 HEA impact evaluation was to determine net energy and peak demand savings. To calculate gross savings, the Evaluator reviewed the contents of the 2018 tracking sheet. The Evaluator employed the...
AI summary The 2018 HEA impact evaluation calculated net energy and peak demand savings using updated ORs and unitary savings values. The evaluation did not update free-ridership or spillover levels due to recent HEA changes, so 2017 levels were used. A NTGR of 0.76 was applied based on 2017 data.
Table 2: HEA Net-to-gross Ratio 2017 Free-ridership Level 25% Spillover Level 1% Net-to-gross Ratio 0.76 Another spillover effect, associated with unconverted D assessment savings, was also considered in the net energy and peak demand savi...
AI summary Table 2 presents the HEA Net-to-gross Ratio for 2017, with a free-ridership level of 25% and a spillover level of 1%. The net-to-gross ratio is 0.76. A spillover effect from unconverted D assessment savings is also noted, contributing 0.836 GWh and 0.236 MW in energy and peak demand savings.
Several measures offered under HEA are also offered under Green Heat. To ensure that energy savings are not claimed twice for the same upgrade, savings already claimed in Green Heat are deducted from HEA net electrical savings. For HEA, ne...
AI summary The Home Energy Assessment (HEA) program calculates net savings by deducting Green Heat savings and applying the net-to-gross ratio (NTGR) to gross savings. In 2018, HEA achieved 5.724 GWh in net electrical energy savings and 1.600 MW in net peak demand savings.
Measure Category Free-ridership Level Net-to-gross Ratio Biomass and Solar Measures 58% 0.42 Central Heat Pumps 29% 0.71 MSHPs 54% 0.46 Heat Pump Water Heaters 0% 1.00 As presented in Table 5, applying the NTGRs to gross savings yields 4.2...
AI summary Table 5 presents free-ridership levels and net-to-gross ratios for various energy efficiency measures, with net electrical energy and peak demand savings calculated for 2018 using NTGRs.
Table 5: Comparison of Green Heat Tracked and Evaluated Savings at the Generator Initial Gross Savings Adjusted Gross Savings NTGR Net Savings Energy Savings ENS Tracked Savings 8.826 GWh 8.826 GWh 0.60 5.294 GWh Evaluation Results 8.826 G...
AI summary Table 5 compares Green Heat tracked and evaluated savings at the generator, showing energy and peak demand savings, with adjustments based on the net-to-gross ratio (NTGR). ENS tracked savings and evaluation results are presented for both energy and peak demand, with different NTGRs applied for various measures.
EPI Energy Savings To calculate EPI gross energy savings, the Evaluator performed a literature review of the unitary savings values of each category of product tracked and installed through EPI. The Evaluator found that the values used to...
AI summary The Evaluator calculated EPI gross energy savings by reviewing unitary savings values for various products and updating them based on new data. Installation rates for certain products were adjusted, and the NTGR was determined to estimate net energy savings, with different values for low-income and non-low-income participants.
LED Lamps Low-flow Showerheads Other Products Non-low income Participants Low income Participants Non-low income Participants Low income Participants Non-low income Participants Low income Participants NTGR 0.80 1.00 0.95 1.00 1.03 1.00 Pr...
AI summary Table 6 presents the EPI Net-to-gross Ratios (NTGR) for different product categories and participant types, highlighting the proportion of gross savings and overall NTGR values.
Comparison with 2017 Evaluation Scope No market evaluation was carried out for HEA in 2018; hence, no participant survey was conducted. The impact evaluation scope was considered reduced since net-to-gross ratios (NTGRs) were not measured...
AI summary In 2018, no market evaluation was conducted for HEA due to the absence of participant surveys. The evaluation scope was reduced as NTGRs were not measured. These decisions were informed by the 2018 evaluation objectives, prior results, and recent program changes within the ENS portfolio, with further details in Section 1 of the DSM Programs Evaluation Executive Summary.
3.3 Net-to-gross Ratio The NTGR serves to determine net savings, i.e. the energy savings that can be reliably attributed to a program component. More precisely, the NTGR represents the positive or negative impact of market effects on gross...
AI summary The net-to-gross ratio (NTGR) is used to determine net savings by accounting for market effects on gross savings, specifically free-ridership and participant spillover in the context of home energy assessments (HEA).
Table 18: Average Participant Spillover Level for HEA Average Participant Spillover Level Sample Size Population Size Margin of Error 1% 69 931 4.1% 3.3.3 Net-to-gross Ratio Calculation
AI summary Table 18 presents the average participant spillover level for Home Energy Assessments (HEA), showing a 1% spillover level with a sample size of 69 and a margin of error of 4.1%. Section 3.3.3 discusses the Net-to-Gross Ratio (NTGR) calculation, an important metric in energy efficiency programs.
8.2 Net-to-gross Ratio The NTGR serves to determine net savings, i.e. the savings that can be reliably attributed to a program component. More precisely, the NTGR includes effects, such as free-ridership and spillover, that positively or n...
AI summary The Net-to-gross Ratio (NTGR) is used to determine net savings attributable to a program component, considering factors like free-ridership. In the Green Heat Program, only free-ridership is considered as an effect influencing energy savings.
8.2.2 Net-to-gross Ratio Calculation The NTGR was calculated using the following equation: $$NTGR = (1 - \% \text{ free-ridership})$$ Using the free-ridership levels established for each measure type, the NTGR value was established at 0.42...
AI summary The Net-to-gross Ratio (NTGR) was calculated using a formula that accounts for free-ridership levels. The NTGR values vary by measure type, with values ranging from 0.42 for biomass and solar measures to 1.00 for heat pump water heaters (HPWHs).
13.2 Net-to-gross Ratio The NTGR serves to determine net energy savings, i.e. the energy savings that can be reliably attributed to a program component. More precisely, the NTGR represents the positive or negative impacts of interactive ef...
AI summary The Net-to-gross Ratio (NTGR) is used to determine net energy savings attributable to a program component, considering interactive effects such as free-ridership and participant spillover in the context of the Efficient Product Installation (EPI) program.
Net savings are defined as the energy-use reductions that are specifically attributable to EPI. Net savings were estimated by applying the above overall NTGR to the gross savings, as exemplified in the following equation: Net Savings = Gro...
AI summary The text explains how net savings from the Efficient Product Installation (EPI) program are calculated using the Net-to-Gross Ratio (NTGR). It provides specific figures for energy and peak demand savings in 2018 and estimates the associated CO2 emissions avoided. The calculation method and data sources are outlined.
Table 50: Evaluated Net Energy and Peak Demand Savings by Product Category for EPI L E D La m p s Ca f Pr du te t g or y o o c P A R 3 8 1 5 W Re la in 1 2 0 W p c g P A R 5 W 3 8 1 Re la in p c g 5 W 1 0 G U W 1 0 7 Re la in p c g 5 W 3 G...
AI summary Table 50 presents evaluated net energy and peak demand savings by product category for the Efficient Product Installation (EPI) program. It includes metrics like Net-to-Gross Ratio (NTGR) and total net energy savings for various products such as LED and lamps.
Table 51: Comparison of Tracked and Evaluated EPI Savings at the Generator Initial Gross Savings Adjusted Gross Savings NTGR Net Savings Energy Savings ENS Tracked Savings 16.093 GWh 14.468 GWh 0.93 13.480 GWh Evaluation Results 15.914 GWh...
AI summary Table 51 compares tracked and evaluated EPI savings at the generator. Evaluated net energy savings are 5% lower than tracked net energy savings, attributed to slight decreases in installation rate, NTGR value, and unitary savings adjustments.
Table 52: Overall Savings for Existing Residential Participation Level Gross Savings NTGR Net Savings HEA Energy Savings 6.366 GWh 0.90 5.724 GWh Lifetime Energy Savings 791 participants 127.258 GWh 0.90 114.488 GWh Peak Demand Savings 1.8...
AI summary Table 52 presents overall savings from existing residential energy efficiency programs, including HEA, Green Heat, and EPI, detailing gross and net savings in energy and peak demand, along with the net-to-gross ratio (NTGR) for each category.
NHC Energy Savings The objective of the 2018 NHC impact evaluation was to establish net energy and peak demand savings. Prior to reviewing the gross savings calculations, the Evaluator reviewed the contents of the 2018 tracking sheet to en...
AI summary The 2018 NHC impact evaluation calculated net energy and peak demand savings by adjusting gross energy savings with overestimation ratios and applying net-to-gross ratios (NTGRs). Free-ridership and market effects levels from 2017 were used, resulting in NTGRs of 0.95 for NHC and 0.39 for the Passive House pilot. Net savings were determined as 4.481 GWh and 1.268 MW for NHC, and 0.035 GWh and 0.010 MW for the Passive House pilot.
4.3 Net-to-gross Ratio The net-to-gross ratio (NTGR) serves to determine net savings, i.e. the energy savings that can be reliably attributed to a program component. More precisely, the NTGR represents the positive or negative effects on g...
AI summary The net-to-gross ratio (NTGR) is used to determine net savings from a program component by accounting for free-ridership and market spillover effects on gross savings.
BER Mail-In The results of the site visits and project reviews revealed that only small adjustments were required to tracked energy savings, in large part due to the improvements made to the participant application forms, which allowed ENS...
AI summary Site visits and project reviews indicated minimal adjustments were needed to tracked energy savings, largely due to improved participant application forms that enabled accurate HOUs tracking. The NTGR was calculated at 0.83 using free-ridership and spillover effects from participant surveys and interviews.
Table 2: Net-to-gross Ratio for BER Mail-in 2018 Free-ridership Level 17% Spillover Level 0% NTGR 0.83 BER Instant Rebates
AI summary Table 2 provides the net-to-gross ratio for BER Mail-in in 2018, showing a free-ridership level of 17% and a spillover level of 0%, with an NTGR of 0.83. The section on BER Instant Rebates likely discusses rebate programs for businesses.
To establish the gross savings of Instant Rebates for 2018, the Evaluator reviewed the tracked savings to ensure that the recommended savings values from the 2016 evaluation were applied correctly and made only minor adjustments. Net savin...
AI summary The Evaluator calculated the net savings for Instant Rebates in 2018 by applying NTGRs to gross savings and measured free-ridership using surveys and interviews, resulting in an overall NTGR of 0.72 for energy savings.
Table 3: 2018 Net-to-gross Ratio for BER Instant Rebates Measure Category NTGR LED Linear Fixtures 0.71 LED Downlight Fixtures 0.66 LED Linear Lamps 0.63 LED General-use and Decorative Lamps 0.68 Other Measures 1.00 Overall Energy Savings...
AI summary Table 3 presents the 2018 net-to-gross ratio for BER Instant Rebates, showing varying ratios for different energy efficiency measures. The overall energy savings ratio is 0.72, while peak demand savings is 0.74.
Table 4: Overall Comparison of Tracked and Evaluated Savings at the Generator for BER Initial Gross Savings Adjusted Gross Savings NTGR Net Savings Energy Savings ENS Tracked Savings 101.271 GWh 101.271 GWh 0.76 77.208 GWh Evaluation Resul...
AI summary Table 4 compares tracked and evaluated savings for the Business Energy Rebates (BER) program, showing differences in energy and peak demand savings between ENS tracked savings and evaluation results, with adjustments based on the net-to-gross ratio (NTGR).
4.2 Net-to-gross Ratio The net-to-gross ratio (NTGR) serves to determine net savings, i.e. the savings that can be reliably attributed to a service. More precisely, the NTGR is established by giving due consideration to the effects, namely...
AI summary The net-to-gross ratio (NTGR) is used to calculate net savings from energy efficiency services by accounting for free-ridership and spillover effects that influence energy savings.
5.2 Net-to-gross Ratio As mentioned in Subsection 4.2, the NTGR serves to determine net savings, i.e. the savings that can be reliably attributed to a service. In the case of Instant Rebates, the NTGR is established by considering free-rid...
AI summary The Netting and Transfer Guidance Ratio (NTGR) is used to determine net savings attributable to a service, particularly in the case of Instant Rebates, where free-ridership is considered to establish the NTGR.
6.2 Net -to-gross Ratio2 29 6. 2.1 Free-ridership 29 6.3 Net Savings 30 7 В UILD ING OPTIMIZATION MARKET EVALUATION 31 8 В UILD ING OPTIMIZATION IMPACT EVALUATION 32 8.1 Gro ss Savings 32 8. 1.1 Project Review Findings 32 8. 1.2 Interactiv...
AI summary The document outlines various evaluations related to energy efficiency programs, including market evaluations, impact assessments, and the calculation of net-to-gross ratios and net savings. It references follow-up actions on previous evaluation reports and describes the objectives and methodologies used in these assessments.
Table 2: Retrofit Net-to-gross Ratio Retrofit Free-ridership Level 14% Spillover Level 0% Net-to-gross Ratio 0.86
AI summary Table 2 presents the Retrofit Net-to-gross Ratio with a free-ridership level of 14%, a spillover level of 0%, and a net-to-gross ratio of 0.86. This data is relevant to assessing the effectiveness of retrofit programs in achieving their intended energy efficiency outcomes.
New Construction Impact Evaluation During the site visits, the Evaluator found that all energy efficiency measures had been implemented for the four visited projects. The energy savings were reduced by 36 percent for those four projects be...
AI summary The New Construction Impact Evaluation found that energy efficiency measures were implemented in four projects, but energy savings were reduced by 36% due to errors in energy models. Free-ridership was measured at 36%, and the NTGR applied was 0.64. The program generated 1.500 GWh in net electrical energy savings and 0.500 MW in net peak demand savings, avoiding 835 tonnes of CO2 eq annually.
Building Optimization In 2018, six projects were completed through Building Optimization service. The 2018 evaluation included a review of three of those projects for which both a project file review and an on-site visit was conducted. Sim...
AI summary In 2018, six Building Optimization projects were completed, with three reviewed through on-site visits and project file reviews. Participant satisfaction was high, but energy savings were reduced by 39% and peak demand savings by 22% due to engineering errors. The net electrical energy savings were 1.184 GWh, avoiding 725 tonnes of CO2 eq in annual GHG emissions.
SEM Energy Savings To evaluate energy savings, the Evaluator reviewed the preliminary project documentation provided by ENS to prepare on-site visits and understand the key operating variables that had been chosen to create the regression...
AI summary The Evaluator assessed the energy savings from the Strategic Energy Management (SEM) program in 2018, finding that the tracked savings required minimal adjustments, primarily due to errors in ENS tracking. Peak demand savings were calculated by the Evaluator, and an average effective useful life of three years was applied to the savings. Free-ridership and spillover effects were assumed to be nil, but the Evaluator recommended continued monitoring. A special adjustment was made for a participant who installed high-efficiency lighting through Business Energy Rebates (BER) before starting SEM.
4.2.3 NTGR Calculation The NTGR was calculated using the following equation: $$NTGR = (1 - \% \text{ free-ridership} + \% \text{ participant spillover})$$ Using the free-ridership and spillover levels established for Retrofit, the NTGR val...
AI summary The NTGR (Net-to-gross ratio) was calculated using a formula that accounts for free-ridership and participant spillover, resulting in an NTGR value of 0.86 based on established levels for Retrofit.
4.3 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 the gross savings, as illustrated in the following equation:...
AI summary Net savings are calculated using the Net-to-Gross Ratio (NTGR) applied to gross energy savings. In 2018, Retrofit generated 8.919 GWh in net energy savings and 0.673 MW in net peak demand savings. The GHG emissions factor used was based on 2017 data from Nova Scotia Power and Emera Inc.
6.2 Net-to-gross Ratio The NTGR serves to determine net savings, i.e. the savings that can be reliably attributed to a program component or service. More precisely, the NTGR is established by considering the effects, namely free-ridership...
AI summary The Net-to-gross Ratio (NTGR) is used to calculate net savings from a program component or service, accounting for free-ridership and spillover effects. For New Construction, spillover is not measured due to the low likelihood of participants constructing additional buildings after program participation.
Table 15: Revised Gross Energy for Building Optimization Partial Savings Final Savings for Projects Started and Completed in 2018 Final Savings for Multi-year Projects Total Number of Projects 0 6 0 6 Energy Savings Tracked Gross Energy Sa...
AI summary Table 15 provides data on energy and peak demand savings from building optimization projects, including tracked gross energy savings, adjustment ratios, and lifetime energy savings. Section 8.2 discusses the net-to-gross ratio, which is a key metric in evaluating the effectiveness of energy efficiency programs.
14.3 Net-to-gross Ratio The NTGR serves to determine net savings, i.e. the energy savings that can be reliably attributed to a program component. More precisely, the NTGR represents the positive or negative impact of spillover and free-rid...
AI summary The document discusses the Net-to-gross Ratio (NTGR) and its application to energy management information systems (EMIS). It explains that NTGR is used to determine net savings by accounting for spillover and free-ridership effects. For EMIS, a NTGR of 1.00 was applied due to limited participation and negligible spillover effects.
Table 22: SEM Revised Gross Energy and Peak Demand Savings Incremental Savings Number of Projects 4 Energy Savings Tracked Gross Energy Savings – at the Meter (GWh) 1.597 Adjustment Ratio for Energy Savings 0.921 Gross Energy Savings – at...
AI summary Table 22 presents SEM Revised Gross Energy and Peak Demand Savings, including energy savings metrics, adjustment ratios, and peak demand savings. The table includes data on number of projects, energy savings at the meter and generator, line loss factors, and effective useful life. Section 18.2 discusses the Net-to-gross Ratio.