E-32025 DSM Evaluation Reports
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Appliance Retirement - › With the program component having been discontinued in January 2025, ARet fell short of its net savings targets, achieving 9% of both its electrical energy and peak demand savings targets. - › The evaluated net ele...
AI summary The Appliance Retirement (ARet) program, discontinued in January 2025, achieved only 9% of its electrical energy and peak demand savings targets. It retired 77,981 appliances since 2012, with savings evaluations matching EfficiencyOne's (E1) tracking.
iciency of household refrigerating appliances, Applied Thermal Engineering, Volume 205 (117992), 25 March 2022. https://doi.org/10.1016/j.applthermaleng.2021.117992 (last accessed November 30, 2022). U.S. Department of Energy, Office of En...
AI summary The text lists references to energy efficiency regulations, appliance standards, and studies on household refrigeration and cooling technologies, citing organizations like Natural Resources Canada, the U.S. Department of Energy, and Efficiency Nova Scotia. It includes reports on energy conservation standards, EnerGuide directories, and evaluations of residential rebate programs.
Program Components Bibliographic References https://www.energystar.gov/products/water_heaters/water_heater_solar/benefits_savings. National Renewable Energy Laboratory. Benchmarking Utility-Scale PV Operational Expenses and Project Lifetim...
AI summary The document includes various bibliographic references and exhibits related to energy efficiency programs, appliance retirement, and emissions reporting. It cites resources from the National Renewable Energy Laboratory, Nova Scotia Utility and Review Board, and Nova Scotia Power.
Table 1: Summary of 2025 Residential Efficient Product Rebates Program Evaluation Program Evaluation Type Component Impact Process Market Methodology Appliance Retirement Condensed › Tracking sheet audit › Calculations using evaluation res...
AI summary This table summarizes the evaluation of the 2025 Residential Efficient Product Rebates Program, focusing on the Appliance Retirement and Instant Savings components. It outlines the evaluation methodologies, including tracking sheet audits, NTGR calculations, and GHG emission reductions.
1 ARet Overview This section describes the Appliance Retirement (ARet) program component, follows up on past evaluation recommendations, and provides an overview of participation history.
AI summary This section outlines the Appliance Retirement (ARet) program, addresses past evaluation recommendations, and provides an overview of participation history related to retiring inefficient appliances.
1.1 ARet Description Through ARet, E1 promotes the retirement of old, inefficient household appliances such as refrigerators, freezers, room air conditioners, and dehumidifiers. ARet educates Nova Scotians about the cost of maintaining old...
AI summary ARet, managed by E1, retires inefficient household appliances in Nova Scotia, offering rebates and free pick-up services. ARCA Canada Inc. handles collection and recycling. Eligibility requires appliances to be 10+ years old, with specific size and rebate criteria. The program aimed for 1.247 GWh energy savings in 2025 but was discontinued in January 2025.
1.3 Participation History Since 2012, ARet has retired or replaced a total of 77,981 old and inefficient appliances from homes and schools. These appliances were recycled so that they could not be refurbished, sold second hand, or left plu...
AI summary ARet retired 77,981 appliances from 2012-2024, with 285 in 2025. Discontinuation in 2025 caused a 95% drop. Incentives increased in 2021, and eligibility criteria changed in 2020 and 2023.
3.2 Gross Savings For ARet, gross savings correspond to the change in energy consumption resulting from the retirement of energy inefficient appliances in participants' homes compared to the consumption level had retirements not occurred....
AI summary Gross savings for Appliance Retirement (ARet) are calculated based on energy consumption changes from retiring inefficient appliances. The 2025 evaluation relied on prior Demand-side Management Measure Assessment (DSM MA) values since no updates were planned, using detailed unitary savings calculations from the DSM MA.
3.2.3 Interactive Effects Interactive effects occur when the implementation of an energy efficiency measure has an impact on the energy consumption of other elements such as heating and cooling equipment. For ARet, retiring old appliances...
AI summary Interactive effects from appliance retirement (ARet) influence heating and cooling loads, with older appliances releasing more waste heat. The 2025 DSM MA evaluates these effects, concluding they are negligible (0% factor). This impacts energy consumption calculations for efficiency programs.
3.2.5 Evaluated Gross Savings The gross electrical energy and peak demand savings resulting from the retirement of appliances through ARet are listed in [Table](#page-93-0) 6 below. The line loss factors were updated in 2019 and correspond...
AI summary This section discusses the gross electrical energy and peak demand savings from appliance retirements through ARet. Line loss factors were updated in 2019 and submitted to the Nova Scotia Energy Board as part of the 2014 Cost of Service Study Progress Update. Savings are estimated using specific line loss factors for residential and commercial participants.
Table 6: Evaluated 2025 ARet Gross Electrical Energy and Peak Demand Savings Appliance Retirement Measure Category Refrigerators Freezers Room Air Conditioners Small Refrigerators Small Freezers Total Number of Units Retired 184 87 7 6 1 2...
AI summary Table 6 evaluates the 2025 gross electrical energy and peak demand savings from the Appliance Retirement (ARET) program. It details energy savings by appliance category, including units retired, energy savings at the meter and generator, and peak demand savings. Refrigerator and freezer retirements contribute the majority of first-year savings.
Appliance retirements may have occurred due to the influence of ARet even if no application was submitted. This influence can be due to factors such as better awareness about the energy impacts from keeping the appliances. These retirement...
AI summary Appliance retirements may occur due to the influence of the Appliance Retirement (ARet) program, even without formal applications. These retirements are considered spillover effects and are attributed to the program. The spillover calculation method involves estimating energy impacts as a percentage of ARet's gross energy savings. No change in spillover levels has been observed since the last evaluation, and it remains at nil.
Table 9: 2025 ARet Net-to-gross Ratios Appliance Type Average Free-ridership (with Secondary Market Impacts) Spillover NTGR Refrigerators 43% 0.57 Freezers 45% 0% 0.55 Air Conditioners 47% 0.53 Small Refrigerators 32% 0.68 Small Freezers 3...
AI summary Table 9 presents the 2025 ARet Net-to-gross Ratios for various appliance types, showing the percentage of free-ridership and spillover effects. The data highlights how different appliances contribute to energy savings and their impact on overall efficiency.
Table 10: Evaluated 2025 ARet Net Electrical Energy and Peak Demand Savings Appliance Retirement Measure Category Refrigerators Freezers Room Air Conditioners Small Refrigerators Small Freezers Total Electrical Energy Savings Gross Electri...
AI summary Table 10 shows the evaluated 2025 ARet Net Electrical Energy and Peak Demand Savings, indicating that ARet only achieved 9% of its electrical energy and peak demand savings targets. The table includes metrics such as gross and net energy savings, NTGR, line loss factor, and effective useful life.
Table 11: Comparison of 2025 ARet Tracked and Evaluated Savings at the Generator Gross Savings NTGR Net Savings Realization Rate Value Unit Value Value Unit Value Electrical Energy Savings 0.205 GWh 0.56 0.115 GWh 100% 0.205 GWh 0.56 0.115...
AI summary Table 11 compares the 2025 ARet tracked and evaluated savings at the generator, showing electrical energy and peak demand savings, along with net-to-gross ratios (NTGR) and realization rates. The table highlights that the realization rate for both energy and demand savings is 100%.
4 ARet Key Findings and Recommendations The 2025 ARet evaluation consisted of a condensed impact evaluation whose main objectives were as follows: › Calculate gross and net ARet results, namely electrical first-year and lifetime energy sav...
AI summary The 2025 ARet program underperformed, achieving only 9% of its electrical energy and peak demand targets. Net savings were 0.115 GWh and 0.017 MW, far below planned 1.247 GWh and 0.179 MW. Refrigerator/freezer retirements drove 96% of savings, but participation dropped 95% due to program discontinuation in January 2025.
Appliance Retirement Appendix I ARet: Tracking Sheet Audit Appendix II ARet: 2025 Recommendations
AI summary The document includes appendices related to Appliance Retirement (ARet), featuring a tracking sheet audit and 2025 recommendations. These sections likely outline processes for retiring inefficient appliances and associated program evaluations.
APPENDIX II ARet 2025 Recommendations The Evaluator made no specific recommendation as part of the 2025 evaluation of ARet.
AI summary The Evaluator did not provide specific recommendations following the 2025 evaluation of the Appliance Retirement (ARet) program.
EfficiencyOne
AI summary The document introduces EfficiencyOne (E1) within the context of Nova Scotia's regulatory proceedings, focusing on energy efficiency programs and related acronyms. It highlights topics such as demand-side management, appliance retirement, and heat pump initiatives, while referencing Efficiency Nova Scotia and Nova Scotia Power.
1.1 BER Description BER provides financial incentives in the form of prescriptive rebates or interest-free financing to business, non-profit, and institutional (BNI) participants to reduce electricity consumption and peak demand in Nova Sc...
AI summary Business Energy Rebates (BER) offer prescriptive rebates and interest-free financing to BNI participants in Nova Scotia to reduce electricity use and peak demand. The program includes Application Rebates (AR) and Instant Rebates (IR), with eligibility criteria based on efficiency standards. In 2025, solar PV rebates were discontinued, rebate levels reduced, and certain technologies (e.g., T8 lighting) became ineligible. BER aimed for 38.451 GWh in energy savings and 7.241 MW in peak demand reduction by 2025.
rical or no heating. 2025 BER-Finding: According to participant distributors, the New Brunswick commercial lighting market has become more energy efficient and diverse over the past three years. These results indicate is increased integrat...
AI summary The 2025 BER-Finding highlights a shift in New Brunswick and Nova Scotia toward LED fixtures, with non-LED options becoming rare. Distributors report market saturation of LED products, declining prices, and no rebound effect from removing BER-IR incentives. Recommendation #6 proposes updating the LED fixture baseline for BER-IR to reflect market practices.
Secondary market impacts Energy consumption of appliances that would have been transferred to the secondary market if said appliances had not been retired.
AI summary The text defines 'secondary market impacts' as the energy consumption of appliances that would have been transferred to the secondary market if they had not been retired.
Table 1: Residential Measure Assessment Change Log Change Type Section Description Date Update 2.4.3(3) Freezer Retirements Updated annual consumption per size for appliances after 2002 for ARet. Updated product characteristics based on 20...
AI summary This table outlines updates to residential measure assessments, including changes to appliance efficiency ratios, energy factors, and calculation methods, effective March 19, 2025.
(4) Wood and Pellet Stoves/Fireplace Inserts
AI summary This section introduces regulatory considerations for wood and pellet stoves/fireplace inserts, likely addressing efficiency standards, emissions, or program eligibility under Nova Scotia's energy policies.
Summary [Table](#page-64-0) 82 presents a summary of the values used to calculate refrigerator retirement savings. The detailed methodology follows.
AI summary Table 82 summarizes the values used to calculate refrigerator retirement savings, with a detailed methodology provided in the document.
Table 82: Refrigerator Retirement Measure Summary Parameter ARet Reference Measure Description and Identification Measure Retirement and recycling of old refrigerators - Baseline Continued usage of old refrigerators Measure Subcategory Ful...
AI summary Table 82 provides a summary of the Refrigerator Retirement Measure, including parameters such as measure description, baseline, installation rate, effective useful life, and energy savings. It outlines energy savings metrics like unitary energy savings and peak demand-to-energy ratio.
a, Refrigerators, Refrigerator-Freezers and Wine Chillers - Energy Efficiency Regulations , (last accessed January 17, 2019). 113 Natural Resources Canada, Registration and Publication of Regulations Amending Canada's Energy Efficiency Reg...
AI summary The text references energy efficiency regulations related to refrigerators and wine chillers by Natural Resources Canada and includes a table presenting parameters and unitary savings calculations for refrigerator retirement measures.
Table 83: Electrical Unitary Savings Values for Refrigerator Retirements ARet Parameter Symbol Manufacture year Class Full-sized Refrigerators ft.3 (≥ 10 ) Small Refrigerators ft.3 (< 10 ) Reference Annual Consumption per Size [kWh/ft3 ] 𝐶...
AI summary Table 83 provides electrical unitary savings values for refrigerator retirements, including annual consumption per size, proportion of refrigerators by manufacture year, average annual consumption, and unitary energy savings. These values are based on data analysis from NRCan, metering activities, and participant surveys.
(3) Freezer Retirements
AI summary The document section titled 'Freezer Retirements' likely addresses programs or policies related to retiring outdated or inefficient freezers, potentially under broader appliance retirement initiatives. It may discuss eligibility, incentives, or impacts on energy efficiency and consumer affordability.
Table 84: Freezer Retirement Measure Summary Parameter ARet Reference Measure Description and Identification Measure Retirement and recycling of old freezers - Baseline Continued usage of old freezers Measure Subcategory Full-sized freezer...
AI summary Table 84 summarizes the Freezer Retirement Measure, detailing parameters such as measure description, baseline, installation rate, energy savings, and peak demand savings. The table provides data for both full-sized and small freezers, including energy savings in kWh/year and peak demand savings in watts.
To determine the electrical unitary energy savings value of retired freezers, the following equations are used. ℎ = × × × − = ∑( × %) Average annual per-cubic-foot energy consumption is calculated using 2017 metering activity results[116](...
AI summary The document outlines the methodology used to calculate the electrical unitary energy savings value of retired freezers, including the use of average annual energy consumption data from various sources and adjustments for aging appliances.
8-8"> 124 Econoler, Residential Efficient Product Rebates Program – 2022 DSM Evaluation , Final Report presented to Efficiency Nova Scotia, March 2023. 116 Econoler, Residential Efficient Product Rebates Program – 2017 DSM Evaluation , Fin...
AI summary The text references evaluations of Nova Scotia's Residential Efficient Product Rebates Program by Econoler (2017, 2022), Natural Resources Canada's EnerGuide appliance directory, and a study on aging refrigerators' energy efficiency. It notes data usage for Measure Assessment updates and cites U.S. Department of Energy regulations for appliance standards.
Table 85: Electrical Unitary Savings Values for Freezer Retirements ARet Parameter Symbol Manufacture year Class Full-sized ft.3 Freezers (≥ 7 ) Small Freezers ft.3 (< 10 ) Reference Annual Consumption per Size [kWh/ft3 ] 𝐶𝑜𝑛𝑠𝑢𝑚𝑝𝑡𝑖𝑜𝑛 𝑃𝑒𝑟𝑆𝑖...
AI summary Table 85 presents electrical unitary savings values for freezer retirements, including annual consumption per size, proportion of freezers by manufacture year, average annual consumption, and unitary energy savings. Data is sourced from various references including NRCan, 2024 ARet tracking sheets, and participant surveys.
(4) Room Air Conditioner Retirements
AI summary This section discusses the retirement of room air conditioners, likely within the context of energy efficiency programs or regulatory measures aimed at reducing energy consumption and environmental impact.
Summary [Table](#page-70-0) 86 presents a summary of the values used to calculate room air conditioner retirement savings. The detailed methodology follows.
AI summary Table 86 summarizes the values used to calculate room air conditioner retirement savings, with a detailed methodology provided in the following text.
Table 86: Room Air Conditioner Retirement Measure Summary Parameter ARet Reference Measure Description and Identification Measure Description Retirement and recycling of old room air conditioners - Baseline Continued usage of old room air...
AI summary This table summarizes the Room Air Conditioner Retirement Measure, focusing on energy savings parameters such as unitary energy savings, peak demand-to-energy ratio, and interactive effects factors. The measure involves retiring and recycling old room air conditioners, with an effective useful life of 3 years and a unitary energy savings of 184 kWh/year.
The electrical unitary energy savings of retired room air conditioners are calculated using the equations below. $$Energy \ Savings \ _{kWh} = \frac{Q \times HOU}{SEER \times 1,000}$$ $$SEER = EER \times RACER$$ The retired unit average ca...
AI summary The document outlines the methodology for calculating energy savings from retired room air conditioners, using formulas involving SEER, EER, and weighted average hours of operation based on data from Nova Scotia cities. It references specific data sources and assumptions about the efficiency of retired units.
Table 87: Electrical Unitary Savings Values for Room Air Conditioner Retirement Parameter Symbol ARet Reference Average Capacity of the Retired Equipment [Btu/h] Q 6,310 Average of 2021, 2022 and 2023 ARet tracking sheets Annual Hours of U...
AI summary Table 87 presents electrical unitary savings values for the retirement of room air conditioners, including parameters such as average capacity, energy efficiency ratio, and calculated unitary energy savings. The data is based on historical tracking sheets and references from Natural Resources Canada and Ecox.
(5) Dehumidifier Replacements or Retirements
AI summary The section discusses considerations related to replacing or retiring dehumidifiers, likely within the context of energy efficiency programs or appliance retirement initiatives in Nova Scotia.
Table 88: Dehumidifier Replacement or Retirement / ENERGY STAR Certified Dehumidifier Measure Summary Parameter ARet, ASFH130 Reference Measure Description and Identification Measure Replacement or retirement of old dehumidifiers - Baselin...
AI summary Table 88 outlines the parameters for the dehumidifier replacement or retirement measure, including installation rates, energy savings, and peak demand savings. The table provides detailed metrics such as unitary energy savings and peak demand-to-energy ratio.
For ARet, dehumidifier electrical unitary energy savings are calculated using the equation below. $$Energy \ Savings \ _{kWh} = AWRC \times AOD \times \left(\frac{1}{EF_{base}} - \frac{1}{EF_{new}}\right)$$ For ARet, the baseline energy fa...
AI summary The document describes the calculation method for energy savings from dehumidifier replacements under the Appliance Retirement (ARET) program, using a formula involving baseline and new energy factors. It references the 2011 Ontario Power Authority (OPA) report for baseline data and assumes replacement rather than mere retirement of units.
Table 89: Electrical Unitary Savings Values for Dehumidifier Replacements or Retirements Parameter/ Symbol ARet, ASFH Reference Average Water Removal Capacity [L/day] 𝐴𝑊𝑅𝐶 3.87 2011 OPA Average Operating Days [days/year] 𝐴𝑂 2011 OPA Energy...
AI summary Table 89 provides electrical unitary savings values for dehumidifier replacements or retirements, including parameters like average water removal capacity, energy factors for baseline and new ENERGY STAR certified dehumidifiers, and calculated unitary energy savings.
(6) ENERGY STAR Certified Clothes Dryers
AI summary The document section focuses on ENERGY STAR Certified Clothes Dryers, likely discussing their role in energy efficiency programs and regulatory considerations within Nova Scotia's utility framework.
(7) Efficient Clothes Washers
AI summary The section titled '(7) Efficient Clothes Washers' likely discusses initiatives or regulations related to promoting energy-efficient washing machines, potentially under broader energy efficiency or appliance standards programs.
Table 93: Clothes Washer Energy Consumption Parameter Symbol Value for Baseline Clothes Washer Value for Efficient Clothes Washer Reference Number of Loads [Loads/Year] 𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝐿𝑜𝑎𝑑𝑠 218 2015 NRCan135 Capacity [L] 𝐶𝑎𝑝𝑎𝑐𝑖𝑡𝑦 127 Weighted a...
AI summary Table 93 compares energy consumption parameters for baseline and efficient clothes washers, including number of loads, capacity, and energy factor. Data sources include Natural Resources Canada and ENERGY STAR Certified Clothes Washers database, with references to 2015 and 2024 surveys.
(8) Efficient Washer-Dryer Combination Units
AI summary This section discusses the evaluation or promotion of efficient washer-dryer combination units, likely within the context of energy efficiency initiatives in Nova Scotia. It may address their role in demand-side management, appliance standards, or program design.
Table 101: Clothes Washer Energy Consumption Parameter Value for Baseline Clothes Washer Value for Efficient Clothes Washer Reference Number of Loads [Loads/Year] 218 2015 NRCan145 Capacity [L] 127 Weighted average capacity based on rebate...
AI summary Table 101 compares the energy consumption of baseline and efficient clothes washers, highlighting parameters such as number of loads, capacity, and energy efficiency factors. The data references sources from Natural Resources Canada and ENERGY STAR Certified databases, emphasizing differences in energy use between the two types of washers.
(10) ENERGY STAR Certified Dishwashers
AI summary The document section titled '(10) ENERGY STAR Certified Dishwashers' likely discusses energy efficiency standards or programs related to dishwashers in Nova Scotia, though the provided text contains no substantive content beyond the heading.
Table 142: EUL Values and Sources for Non-LED Lighting Residential Measures Measure Name Program Component EUL Value Reference Dehumidifier Replacements ARet 5 ENERGY STAR Calculator, Appliance Magazine Market Research Report, 2011 Calcula...
AI summary Table 142 presents EUL (Effective Useful Life) values and sources for non-LED lighting residential measures, including dehumidifier replacements, ENERGY STAR certified clothes dryers, efficient clothes washers, and efficient washer-dryer combination units. The table provides references from ENERGY STAR, DOE, and DEER for the EUL values assigned to these measures.
Table 156: Linear LED Fixture Baseline Wattages for BER-IR Subcategory Lumens Output (lm) Baseline Wattage (W) 1 x 4 Luminaires 1,500 – 3,500 61.0 ≥ 3,500 83.3 2 x 2 Luminaires & Retrofit Kits 1,500 – 4,500 61.0 ≥ 4,500 84.0 2 x 4 Luminair...
AI summary Table 156 outlines baseline wattages for various linear LED fixture subcategories under BER-IR. It provides lumens output ranges and corresponding baseline wattages for different luminaires and retrofit kits, which may be relevant for energy efficiency and regulatory considerations.
(8) High Volume Low Speed Fans
AI summary The section titled '(8) High Volume Low Speed Fans' appears in a Nova Scotia regulatory proceeding document. While no detailed content is provided, the heading suggests a focus on high-volume low-speed fans, potentially within the context of energy efficiency, demand-side management, or appliance standards. Further details are not available in the provided text.
(1) Low-flow Showerheads
AI summary The document section titled 'Low-flow Showerheads' likely discusses water efficiency measures, potentially under energy efficiency or appliance standards programs, though no detailed content is provided in the excerpt.
(1) ENERGY STAR Pool Pumps
AI summary The document section titled '(1) ENERGY STAR Pool Pumps' introduces a regulatory proceeding topic related to ENERGY STAR-certified pool pumps. While no detailed content is provided in the text, the heading suggests a focus on energy efficiency programs and appliance standards in Nova Scotia.
(7) Efficient Refrigeration Compressors (Scroll Refrigeration Compressor)
AI summary The section discusses regulatory considerations for efficient refrigeration compressors, specifically scroll compressors, likely within the context of energy efficiency programs and appliance standards in Nova Scotia.
(1) Dishwasher
AI summary The section titled '(1) Dishwasher' appears in a regulatory proceeding document, though no substantive text is provided. It likely relates to energy efficiency, appliance standards, or program evaluation topics given the context of Nova Scotia's regulatory framework.
6.12.4 Commercial Laundry Measures
AI summary Section 6.12.4 outlines Commercial Laundry Measures, focusing on energy efficiency and demand-side management (DSM) initiatives for commercial laundry operations in Nova Scotia. Key considerations include appliance retirement, efficiency programs, and regulatory frameworks to reduce energy consumption and costs.