Case Study

Mt. Pleasant

Multifamily affordable building electrifies with ground-source heat pumps

This case study was chosen as part of the Empire Building Challenge competition. Click here to learn more about the Empire Building Challenge competition.

The Mt. Pleasant retrofit project demonstrates an effective full-decarbonization roadmap for installing renewable ground-source space conditioning in existing multifamily buildings across New York City. Ascendant’s Mt. Pleasant is a nine story affordable, senior housing building built in 1996 in East Harlem. The decarbonization plan for this building includes envelope improvements in the form of added roof, window, and wall insulation, as well as a ground source heat pump system to be implemented in the rear yard and parking lot that will harness ground temperatures to heat and cool the building’s 50,003 square feet.

Ascendant is an East Harlem based non-profit company that manages 28 affordable apartment buildings. The retrofit project at Mt. Pleasant aligns with Ascendant’s history of green initiatives and resiliency improvements, as well as their broader commitment to the environment and sustainability.

Mt. Pleasant
Energy Savings

74%

Anticipated 74% energy savings from 2022 baseline after retrofit implementation.

Project Planning
Space heating boilers

Assessment shows East Harlem affordable housing site is viable for ground source heat pump system installation.

Project Planning

The decarbonization roadmap for Mt. Pleasant includes a whole building retrofit of the envelope and systems to first reduce energy usage in the building and then electrify all heating and appliances.

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
  • New heat source potential
  • Comfort improvements
  • Indoor air quality improvements
  • Facade maintenance
  • Resilience upgrades
Asset Conditions
  • Capital event cycles
  • Owner sustainability goals
Market Conditions
  • Technology improves

The decarbonization efforts at Mt. Pleasant were triggered by Ascendant’s efforts to reduce the carbon footprint of their building portfolio. Ascendant determined that NYSERDA’s Empire Building Challenge would be a good opportunity to accomplish electrification and energy reduction goals that would otherwise require a patchwork of funding sources. Mt. Pleasant and Ascendant’s other EBC entry, All Saints, were chosen as the two most suitable buildings to this challenge in terms of size, and overall potential impact. For Mt. Pleasant, most of the building equipment is still functional but nearing its recommended date for replacement. The condition of existing equipment meant there was time to develop a roadmap for building improvements but also good reason to replace existing equipment with low-carbon systems

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Existing Conditions

This diagram illustrates the building prior to the initiation of Strategic Decarbonization planning by the owners and their teams.

Click through the measures under “Building After” to understand the components of the building’s energy transition.

Sequence of Measures

2025

2033

2034

Building System Affected

  • heating
  • cooling
  • ventilation
Mt Pleasant before
Mt Pleasant after
Geothermal System for Heating, Cooling and DHW
In-unit Fan Coil Units
Envelope Improvements
Energy Recovery Ventilators
Low Flow Fixtures
Dryer Electrification with Heat Pump Dryers
Cooking Electrification with Induction Stoves

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

$6.9M

Capital costs of decarbonization (e.g. total cost to install all measures): 6.9M.

Cost of ECM #1: Install Geothermal System: 2.96M.

Cost of ECM #2: Exterior Wall Insulation: 900k.

Cost of ECM #3: Roof Insulation: 260k.

Cost of ECM #4: Energy Recovery Ventilation (ERVs): 530k.

Cost of ECM #5: Low Flow Fixtures: 39.7k.

Cost of ECM #6: Electric Allowance: 1.1M.

Cost of ECM #7: Window Replacement: 770k.

Cost of ECM #8: Electric Dryers: 5.5k.

Cost of ECM #9: Electric Ranges: 220k.

 

Avoided Risks

Business-as-Usual Costs

$271k + $14k / YR + $119k / 5 YR

Energy cost savings: $14k / YR.

Repairs and maintenance savings: 119k / 5 YR

BAU cost of system replacement/upgrades: 271k.

Avoided Risks

Business-as-Usual Risks

$0

Local Law 97 or other regulatory fines: N/A

Added Value

Decarbonization Value

$6.7M

Incentives: 6.7M.

Net Present Value

-$357

Negative due to incentive contributions

Mt. Pleasant is an affordable, multifamily building with limited funds available to invest in an electrification project. As such, incentives, grants, and loans are vital for carrying out this roadmap. The initial capital costs for the EBC phase of the roadmap will be covered by incentives and grants. The annual utility costs for the building are projected to decrease slightly despite transitioning from gas to the more expensive electricity for heating, cooking, and laundry. Replacement of cooking and laundry appliances are an unavoidable cost, as these systems must be replaced at the end of their useful life regardless of the electrification initiative. The cost of induction electric cooking may be more expensive than existing costs for gas cooking, but savings from the broader retrofit result in lower overall operational costs and electric cooking is much safer for all residents.

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

Strategic Decarbonization Roadmap

The decarbonization roadmap for Mt. Pleasant includes a whole building retrofit of the envelope and systems to first reduce energy usage in the building and then electrify all heating and appliances. The planned envelope improvements include adding roof insulation, exterior wall insulation, and replacing windows. Supply ventilation will also be added to the apartments and exhaust fans will be replaced with energy recovery ventilators which will further reduce the conditioned air typically lost to the outside. The geothermal system will be sized based on the reduced heating and cooling loads, with boreholes buried under the existing parking lot. Engineers determined that a geothermal system was viable and our team investigated whether the existing hydronic distribution system could be used. However, because a geothermal system needs to be balanced with heating and cooling loads, re-piping was determined to be the simplest and most cost-effective way to add hydronic cooling pipes. Other methods would require similarly invasive construction but with more equipment. The energy conservation measures and geothermal system will be implemented by 2027. The remaining laundry and cooking electrification will occur in 2033 and 2034 respectively, or when existing equipment fails.

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James Geddes Development

Innovative Hydronic Shell HVAC overclad to transform Syracuse Housing Authority high-rise

This case study was chosen as part of the Empire Building Challenge competition. Click here to learn more about the Empire Building Challenge competition.

418 Fabius St is a multifamily building constructed in the 1950s that is part of Syracuse Housing Authority’s SHA’s James Geddes Development. This housing development is located on the West Side of Syracuse, NY, and comprises a total of 477 dwelling units housing 853 residents, and an estimated 265,000 square feet of construction spread across 35 buildings: 4 high-rise towers and 31 two-story rowhouses. The building selected for this pilot project, 418 Fabius St, is one of the high-rises, spanning seven-stories with a full basement below grade. The building has 52 dwelling units and a community space across 38,840 square feet of gross area, with an “X”-shaped footprint and four wings radiating from a central core.

The proposed scope applies a new overclad façade with Hydronic Shell’s heating, cooling, and ventilation system. The Hydronic Shell is a complete central HVAC distribution system that is integrated into prefabricated modular façade panels that are assembled quickly, cost-effectively, and non-invasively around the exterior of a multifamily building. It dramatically reduces energy consumption and carbon emissions, improves indoor air quality and comfort, reduces operating expenses, and revitalizes the building appearance with minimal disruption to building tenants.

The goal of the project is to demonstrate this novel technology and develop a model that is replicable across the rest of the James Geddes Development, SHA’s 2,500-dwelling unit portfolio as part of SHA’s overall long-term strategic sustainability goals, and other similar public housing developments across the Northeast.

James Geddes Development
Funding

Cycle Retrotech and Hydronic Shell Technologies, in collaboration with the Syracuse Housing Authority and other partners, has been awarded multiple grants for the development of the retrofit pilot at 418 Fabius St, including the 2023 Enterprise Community Partner’s Housing Affordability Breakthrough Challenge (HABC), the 2024 U.S. Department of Energy Buildings Energy Efficiency Frontiers & Innovation Technologies (BENEFIT), and The Clean Fight’s 2024 Empire Technology Prize; and it is anticipated that 100% of the project will be funded through grants and incentive programs.

Project Planning

Hydronic Shell’s HVAC distribution system will be integrated into the prefabricated panels and all major components will be installed from the outside of the building, with minimal tenant disruption. This is a novel and replicable approach that will facilitate the deployment of building deep energy retrofits at scale.

Emissions Reductions

The proposed scope will add central cooling and balanced ventilation to every apartment, improving indoor air quality and comfort, while also bringing the building’s site Energy Use Intensity (EUI) below 30, even without the integration of solar power or other Distributed Energy Resources (DERs).

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
  • System Failure
  • Equipment nearing end-of-life
  • New heat source potential
  • Comfort improvements
  • Indoor air quality improvements
  • Facade maintenance
  • Resilience upgrades
  • Efficiency improvements
Asset Conditions
  • Recapitalization
  • Carbon emissions limits
  • Owner sustainability goals
Market Conditions
  • Technology improves
  • Market supply changes
  • Infrastructure transitions

The decarbonization roadmap for the James Geddes Development outlines a comprehensive and actionable plan designed to achieve substantial energy efficiency and ambitious capital and operational improvements while striving for considerably lower emissions and better public housing for the James Geddes community. This housing development is facing challenges related to aging infrastructure and limited funding for necessary upgrades, which are issues that are also prevalent among other SHA developments and housing authorities nationwide. The proposed roadmap addresses these issues by providing a modern technological solution and an innovative implementation model that supports the long-term revitalization of essential public housing assets.

The proposed panelized solution will reduce installation time, enabling the application of logistics planning and installation tools, and ultimately reducing costs compared to conventional methods, such as the installation of EIFS or rainscreens, shifting the paradigm of deep energy retrofits from time consuming labor-intensive field assembly to a scalable, industrialized assembly and installation method. This prefabricated, modular, non-invasive, and cost-effective retrofit solution has the potential to be scaled across the remaining buildings in the James Geddes Development, other properties in SHA’s portfolio, and buildings of similar typology in the US. The success of Phase 1 of the 418 Fabius retrofit could serve as a catalyst for a broader initiative, paving the way for the development of subsequent Phases 2 and 3.

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Existing Conditions

This diagram illustrates the building prior to the initiation of Strategic Decarbonization planning by the owners and their teams.

Click through the measures under “Building After” to understand the components of the building’s energy transition

Sequence of Measures

2027

2029

Building System Affected

  • heating
  • cooling
  • ventilation

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

Avoided Risks

Business-as-Usual Costs

Avoided Risks

Business-as-Usual Risks

Added Value

Decarbonization Value

Net Present Value

Cost details forthcoming 

The proposed business case for the project leverages the advantages of a modular offsite solution with increased efficiencies in building operations to significantly improve the financial performance of the building. Through this model, the cost of ownership of the building will decrease significantly, and a more stable and predictable cash flow for the property will be ensured. This stability is particularly crucial in the context of public housing, where predictable funding and cost management are essential. This model provides a replicable framework for improving the financial health and operational efficiency of public and affordable housing across the United States. By adopting such a model, other affordable and low-income housing authorities can achieve similar benefits, ensuring long-term sustainability and resilience for their portfolios while enhancing the quality and equity of public and affordable housing for years to come.

Additionally, while this project is the first pilot of this technology, wide-scale adoption could reduce costs by up to 50% through economies of scale, efficient production, and reduced labor expenses, making future retrofits even more financially attractive. Also, utility rates are relatively low in Syracuse, but the NOI will be more favorable in markets with higher utility rates such as New York City (NYC). This is because the retrofit will lead to greater savings on utility costs, which will have a more substantial impact on the NOI, improving the overall financial performance in these markets.

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

Strategic Decarbonization Roadmap

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Melrose & Noll St. Apartments

Thermal network to support decarbonization of affordable housing

This case study was chosen as part of the Empire Building Challenge competition. Click here to learn more about the Empire Building Challenge competition.

Noll Apartments, located at 43 Central Avenue, and Melrose Apartments, located at 63 Central Avenue, are neighboring buildings in Brooklyn, New York. The buildings are 6 stories and total 131,865 square feet with 98 affordable apartment units. The decarbonization retrofit planned for these buildings includes a package of measures that will:

  • Combine all mechanical equipment into a single central plant serving both buildings which will facilitate thermal energy recovery, allow for the integration of future decarbonized thermal energy sources, and reduce first- and ongoing maintenance costs. 
  • Electrify, and recover energy for, loads currently served by fossil fuels (heating and domestic hot water). 
  • Improve the energy efficiency of the buildings by reducing thermal loads through ventilation energy recovery and envelope improvements
  • Reduce construction costs by avoiding the staggering of measure implementation where possible.

Creating resilient and sustainable communities are key components of RiseBoro’s mission. The principles of energy efficiency, improved health outcomes, reduced consumption, and responsible use of natural resources are core beliefs of the organization.

Melrose & Noll Apartments
Lessons Learned

The project used the Resource Efficient Decarbonization (RED) methodology to consider various technical and financial options and determine the optimal decarbonization pathway.

Lessons Learned

The project utilizes existing technology in a creative new application to greatly reduce the initial costs of electrification.

Emissions Reductions

61%

A displacement strategy approach was developed to maximize cost-efficacy of decarbonization without burdening affordable housing residents and operators, resulting in a 61% projected energy use reduction for the building by the end of the Empire Building Challenge project.

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
  • Equipment nearing end-of-life
  • New heat source potential
  • Comfort improvements
  • Indoor air quality improvements
  • Facade maintenance
  • Efficiency improvements
Asset Conditions
  • Capital event cycles
  • Owner sustainability goals
Market Conditions
  • Technology improves
  • Market supply changes

Noll Apartments and Melrose Apartment contain the original HVAC equipment from their construction in the early- and mid-2000s that is nearing the end of its useful life. This aging equipment, considered alongside a recent recapitalization event, presents an opportunity to focus on improving energy efficiency and reducing carbon emissions. Additionally, these buildings are part of a tranche of buildings in the RiseBoro portfolio constructed prior to the adoption of more aggressive energy efficiency approaches. Implementation of the decarbonization retrofits will not only lower the buildings’ emissions, but will also bring energy performance up to, or higher than, other buildings in the portfolio. The Empire Building Challenge program provided a unique opportunity at a convenient time to create a holistic roadmap and retrofit plan.

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Existing Conditions

This diagram illustrates the building prior to the initiation of Strategic Decarbonization planning by the owners and their teams.

Click through the measures under “Building After” to understand the components of the building’s energy transition.

Sequence of Measures

2027

Building System Affected

  • heating
  • cooling
  • ventilation
Melrose & Noll Apartments before
Melrose & Noll Apartments after
Central Mechanical Plant
Active Thermal Connector (ATC)
Central AWHPs and HACs
Terminal Unit Replacement
Wastewater Heat Recovery Heat Pumps for DHW
Envelope Upgrades
Ventilation Upgrades
Electrical Upgrades and Grid-Interactive Controls
Solar PV on new roof canopy
Future Thermal Energy Netwrok (TEN) Connection
Additional Electrical Upgrades
Cooking Ranges & Commercial Dryer Electrification

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

$19.4M

Avoided Risks

Business-as-Usual Costs

$755,000 + $74,000 / YR

Energy cost savings: 74k / YR.

Repairs and maintenance savings: Minimal

BAU cost of system replacement/upgrades: 755k.

Avoided Risks

Business-as-Usual Risks

$0

Added Value

Decarbonization Value

$7M

Incentives: ~7M (estimated).

Net Present Value

-$11.5M

The business case for decarbonization is centered around the buildings’ recapitalization cycles and a reduction in operating expenses.

The buildings currently face no potential penalties under Local Law 97 (since they are affordable housing covered under Article 321) and the operational savings are not commensurate with the cost of the Roadmap.

This is a typical situation in multifamily buildings, especially affordable housing, where the discounted cash flow analysis shows a negative present value compared to business as usual. High initial costs and the high cost per-unit of electricity compared to gas in New York City both push paybacks in an unattractive direction. A building will typically see only a handful of opportunities to fund capital projects. Incentives and tax credits are critical in making the business case for decarbonization.

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

Strategic Decarbonization Roadmap

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High Temperature Heat Pump 101 Guide

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
Asset Conditions
Market Conditions

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

Avoided Risks

Business-as-Usual Costs

Avoided Risks

Business-as-Usual Risks

Added Value

Decarbonization Value

Net Present Value

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

This guide from The Clean Fight and RMI helps building owners and managers understand how high-temperature heat pumps can decarbonize steam and hot-water space heating systems. It outlines key benefits, technology basics, example products, and strategies for effective retrofit integration. High-temperature heat pumps offer a new, less disruptive path to electrification for buildings with steam or hot water distribution.

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Case Study

Strategic Decarbonization Planning Training Series

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
Asset Conditions
Market Conditions

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

Avoided Risks

Business-as-Usual Costs

Avoided Risks

Business-as-Usual Risks

Added Value

Decarbonization Value

Net Present Value

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

About the Series

NYSERDA and Building Energy Exchange, in collaboration with RMI, University of Cincinnati, and Ember Strategies, are excited to offer a comprehensive three-part Strategic Decarbonization Planning training series designed to help industry professionals tackle complex retrofit projects with confidence. Tailored for professionals in engineering, real estate, and technology, this training series will equip participants with the tools and knowledge to drive practical, cost-effective low-carbon retrofits in large buildings. Grounded in lessons learned from NYSERDA’s Empire Building Challenge and their innovative retrofit demonstration projects, participants will learn how to:

  • Identify effective retrofit strategies by evaluating technical solutions and real estate conditions;
  • Make the case for low-carbon retrofits with compelling business narratives that resonate with decision-makers; and
  • Turn plans into action by creating clear, step-by-step decarbonization roadmaps for real-world projects.

Live training sessions for all three courses are coming this spring. Read more about our high-impact, solutions driven training series below:

Course 1

SDP: RED Framework and Technical Solutions (1.5 AIA LU)

This first course of the series will explore Resource Efficient Decarbonization (RED) as a replicable solutions framework used to develop carbon neutrality roadmaps for large buildings in cold climates. Using real-world examples from Empire Building Challenge retrofit projects, participants will learn how to apply the RED framework to create comprehensive, long-term decarbonization plans for their buildings. Additionally, the training will review a range of technical solutions for decarbonizing buildings, highlighting how prioritization of these technologies can optimize retrofits.

Sign up for March 18

Take Course 1 On-Demand

Course 2

SDP: Building the Business Case for Better Decarbonization (1.5 AIA LU)

The second course will focus on the finance and asset planning components of strategic decarbonization. Participants will learn how to evaluate and align technical solutions with economic realities and long-term asset strategies to inform decision-making. This course will also provide guidance on crafting compelling business case narratives that build stakeholder support and unlock investment for retrofits. By the end of the training, participants will be equipped to develop persuasive business cases that advance building decarbonization projects.

Sign up for March 18

Take Course 2 On-Demand

Course 3

Let’s Decarbonize! A Hands-on Building Decarbonization Workshop

The third course of the series will be a highly interactive session offering a hands-on introduction to building decarbonization planning – delivered in a dynamic, game-based format. The session begins with a brief review of key concepts from the first two courses, then, participants will break into small groups to create a mock decarbonization plan for a real-world building scenario. Teams will evaluate strategies to reduce greenhouse gas emissions while weighing factors such as costs, trigger events, and other site- specific considerations. Come prepared to collaborate, apply your skills, and dive into the decision- making process behind effective building decarbonization.

This material was developed at the University of Cincinnati by Amanda Webb, Barry Abramson, Katherine Castiello Jones, and Heather Cheng. It is based upon work supported by the National Science Foundation under Award No. 2339386.

Sign up for March 19

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High Rise | Low Carbon Multifamily

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
Asset Conditions
Market Conditions

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

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Avoided Risks

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Avoided Risks

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An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

A global survey of 14 high-rise multifamily retrofit profiles that achieved deep energy reductions.

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Retrofit Playbook Event Series: New Decarbonization Tools from ASHRAE, USGBC, and The Retrofit Playbook

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
Asset Conditions
Market Conditions

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

Avoided Risks

Business-as-Usual Costs

Avoided Risks

Business-as-Usual Risks

Added Value

Decarbonization Value

Net Present Value

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

As climate-forward policies have gained momentum and high-performance building technologies have continued to advance, building owners are feeling increasing pressure to decarbonize while navigating a growing array of retrofit options and requirements. How can project teams chart a course through this evolving and overwhelming landscape to confidently plan and implement decarbonization retrofits?

The newly released Guide to Strategic Decarbonization Planning, produced by ASHRAE, U.S. Green Building Council (USGBC), and supported by New York State Energy Research and Development Authority (NYSERDA), presents a comprehensive suite of best practices to operationalize deep decarbonization in buildings by following the strategic decarbonization planning (SDP) framework. SDP is a proven approach to decarbonization planning that integrates holistic technical solutions with pragmatic asset management strategies, enabling project teams to deliver cost-effective, flexible decarbonization projects.

Join ASHRAE, USGBC, and the Retrofit Playbook for Large Buildings team on September 23rd to learn more about the Guide to Strategic Decarbonization Planning and explore how it connects with the tools, case studies, and planning resources available on the RetrofitPlaybook.org. Whether you’re just getting started or refining a long-term roadmap, this session will help you learn how to apply the SDP framework and other practical resources to actualize low-carbon, future-ready building retrofits.

Opening Remarks

Sophie Cardona, Senior Project Manager, NYSERDA

Moderator

Molly Dee-Ramasamy, Director of Deep Carbon Reduction Group, JBB

Presenters

Laurie Kerr, Principal Climate Advisor, USGBC
Phil Keuhn, Principal, RMI

Panelists

Adam Hinge, Managing Director, Sustainable Energy Partnerships
Laurie Kerr, Principal Climate Advisor, USGBC
Phil Keuhn, Principal, RMI
Laura Humphrey, Senior Director of Energy & Sustainability, L+M Development Partners

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Large Building Decarbonization Price Index

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
Asset Conditions
Market Conditions

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

Avoided Risks

Business-as-Usual Costs

Avoided Risks

Business-as-Usual Risks

Added Value

Decarbonization Value

Net Present Value

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

Purpose by Design Architects
Sunamp
RMI
Dextall logo
Capital Logo
Winn Co
Gitel
SWBR
SoC Housing Logo
SHA Logo
Rise Boro Logo
PCA Logo
Mangrann Logo
LaBella Logo
KOW Logo
Kelvin Logo
Joe NYC logo
IAE logo
Hanac logo
First Service Residential Logo
Fairstead Logo
Ettinger Logo
Cycle Retrotech
Chartered Properties Logo
Ascendant Logo
Trinity Church Wall Street Logo
Hines Logo
Norges Bank Investment Management
Energy Machines logo
Consigli logo
URBS Logo
Inglese Architecture + Engineering Logo
Invesco logo
Sharc Energy logo
Loring Consulting Engineers logo
Curtis + Ginsberg Architects logo
Bright Power Logo
Paths LLC logo
EN-Power Logo
Egg Geo Logo
Blueprint Power logo
JB&B logo
Ryan Soames Engineering logo
Steven Winter Associates, Inc. logo
Corentini logo
Skanska logo
Reos Partners logo
Quest Energy Group logo
Luthin Associates logo
Johnson Controls logo
Buro Happold logo
Beam logo
Jonathan Rose Companies logo
Rudin logo
Silverstein Properties logo
Equity Residential logo
The Durst Organization logo
Vornado Realty Trust logo
Tishman Speyer logo
Omni New York LLC logo
LeFrak logo
LM Development Partners logo
Hudson Square Properties logo
Empire State Realty Trust logo
Brookfield Properties logo
Boston Properties logo
Amalgamated Housing Corporation logo

This resource is available to aid design teams and building owners in navigating the complexities of rapidly shifting supply chains. It will provide up-to-date information on lead times and pricing for key equipment essential to the design and implementation of low-carbon building and retrofit projects in large commercial buildings. It will be updated semi-annually to reflect changes in the supply chain.

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Case Study

The Role of Design Charrettes in Building Decarbonization Planning

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
Asset Conditions
Market Conditions

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

Avoided Risks

Business-as-Usual Costs

Avoided Risks

Business-as-Usual Risks

Added Value

Decarbonization Value

Net Present Value

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

As the world grapples with the urgent need to reduce greenhouse gas emissions, the built environment has become a critical focus area to deliver progress. Buildings are significant contributors to global carbon emissions, and transitioning to more sustainable, low-carbon operations is essential for meeting climate goals. Planning for that transition now, through a thoughtful and rational approach, is key to achieving success over time.  

Design charrettes are an important tool project teams can use to support their decarbonization planning work. These collaborative design review workshops bring together diverse stakeholders to develop and refine strategies for reducing carbon emissions from buildings over time.  

What is a Design Charrette?

A design charrette is an intensive, multi-disciplinary workshop aimed at finding and refining solutions to complex problems. The term originated in 19th century Paris and refers to the practice of design students working intensely on their projects until the last minute, when a cart or “charrette” would be wheeled around to collect their final designs. The term has evolved to describe collaborative sessions that bring together developers, designers, domain experts, community members, and an array of other stakeholders to reach mutually beneficial outcomes. In the context of building decarbonization, design charrettes facilitate the rapid development of actionable (and at times substantially more innovative) strategies to reduce emissions from buildings, with alignment among multiple interested parties.  

Why Use Design Charrettes to Achieve Resource Efficient Decarbonization?

  1. Collaborative Problem-Solving: Building decarbonization requires input from a wide range of experts, including architects, engineers, asset managers, environmental scientists, and community leaders. A design charrette brings these diverse voices together in a collaborative setting, ensuring that all perspectives are considered. 
  2. Intensive Focus: The concentrated nature of a charrette allows participants to delve deeply into the problem at hand. Over several hours (or days), stakeholders can explore various scenarios, analyze data, and develop detailed plans that might otherwise take months to create using traditional methods. 
  3. Iterative Process: Charrettes are designed to be iterative, with multiple rounds of feedback and refinement as needed. This approach ensures that the final outcomes are well-vetted and robust, with broad support from all stakeholders. 
  4. Creative Solutions: The collaborative and open nature of charrettes fosters creativity and challenges deeply held assumptions about how to approach a problem by the charrette participants.  Participants are encouraged to think outside the box and develop innovative solutions that might not emerge in a more conventional planning process. 
  5.  Achieving Resource Efficient Decarbonization (RED): Charrettes enable stakeholders to develop highly strategic plans to transition a building away from on-site fossil fuel over time in a way that does not diminish high-performance operations, contains operating and capital expenses, and maintains a complex urban systems perspective including considerations relating to infrastructure and natural resources.

The Design Charrette Process

Charrettes are conducted just after a decarbonization concept plan is created and initial decarbonization measures are framed. A successful charrette requires being prepared to discuss the existing conditions of the building in detail, various decarbonization measures and approaches considered, and an understanding of the social and market conditions influencing the building owner’s decision making. The charrette process includes: 

  1. Preparation: Successful charrettes require careful preparation. This includes identifying key stakeholders and inviting them to join, gathering relevant data, and setting clear objectives for the workshop.  
  2. Workshop Session: During the charrette, the project team presents their building existing conditions and decarbonization approaches and engage in brainstorming, design review, and business discussions with a team of technical experts and industry leaders.
  3. Iteration and Feedback: Ideas generated during the sessions can be reviewed and refined through multiple rounds of feedback and additional charrettes as needed. This iterative process helps to improve and perfect the proposed solutions. 
  4. Implementation and Follow-Up: The final step is to translate the charrette outcomes into a formal strategic decarbonization plan and business case that leads to real-world actions. This may involve further planning, securing funding, and ongoing community engagement. 

Design charrettes are a powerful tool for addressing complex decarbonization challenges, especially in the planning and early implementation phase. With collaboration, creativity, and iteration, charrettes enable the development of effective and sustainable strategies to reduce carbon emissions from buildings.

Want to review your decarbonization plan with our team of experts?

Request a design charrette.

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Case Study

Empire Building Challenge Overview

A baseline assessment is key to understanding current systems and performance, then identifying conditions, requirements or events that will trigger a decarbonization effort. The assessment looks across technical systems, asset strategy and sectoral factors.

Building System Conditions
Asset Conditions
Market Conditions

Effective engineering integrates measures for reducing energy load, recovering wasted heat, and moving towards partial or full electrification. This increases operational efficiencies, optimizes energy peaks, and avoids oversized heating systems, thus alleviating space constraints and minimizing the cost of retrofits to decarbonize the building over time.

Making a business case for strategic decarbonization requires thinking beyond a traditional energy audit approach or simple payback analysis. It assesses business-as-usual costs and risks against the costs and added value of phased decarbonization investments in the long-term.

Retrofit Costs

Decarbonization Costs

Avoided Risks

Business-as-Usual Costs

Avoided Risks

Business-as-Usual Risks

Added Value

Decarbonization Value

Net Present Value

An emissions decarbonization roadmap helps building owners visualize their future emissions reductions by outlining the CO2 reductions from selected energy conservation measures. This roadmap is designed with a phased approach, considering a 20- or 30-year timeline, and incorporates the evolving benefits of grid decarbonization, ensuring a comprehensive view of long-term environmental impact.

Purpose by Design Architects
Sunamp
RMI
Dextall logo
Capital Logo
Winn Co
Gitel
SWBR
SoC Housing Logo
SHA Logo
Rise Boro Logo
PCA Logo
Mangrann Logo
LaBella Logo
KOW Logo
Kelvin Logo
Joe NYC logo
IAE logo
Hanac logo
First Service Residential Logo
Fairstead Logo
Ettinger Logo
Cycle Retrotech
Chartered Properties Logo
Ascendant Logo
Trinity Church Wall Street Logo
Hines Logo
Norges Bank Investment Management
Energy Machines logo
Consigli logo
URBS Logo
Inglese Architecture + Engineering Logo
Invesco logo
Sharc Energy logo
Loring Consulting Engineers logo
Curtis + Ginsberg Architects logo
Bright Power Logo
Paths LLC logo
EN-Power Logo
Egg Geo Logo
Blueprint Power logo
JB&B logo
Ryan Soames Engineering logo
Steven Winter Associates, Inc. logo
Corentini logo
Skanska logo
Reos Partners logo
Quest Energy Group logo
Luthin Associates logo
Johnson Controls logo
Buro Happold logo
Beam logo
Jonathan Rose Companies logo
Rudin logo
Silverstein Properties logo
Equity Residential logo
The Durst Organization logo
Vornado Realty Trust logo
Tishman Speyer logo
Omni New York LLC logo
LeFrak logo
LM Development Partners logo
Hudson Square Properties logo
Empire State Realty Trust logo
Brookfield Properties logo
Boston Properties logo
Amalgamated Housing Corporation logo

Through the Empire Building Challenge (EBC), NYSERDA is supporting forward-thinking leaders in the real estate and engineering industries, in the quest to find workable and scalable, cost-effective approaches to retrofit tall, complex, and hard-to-decarbonize buildings in New York. Partners and projects funded through the flagship $50 million demonstration program are working to reach a zero-emissions future. The groundbreaking work of these leaders is presented in this Playbook, which showcases a novel, compelling framework that can unlock opportunities for decarbonizing most buildings in a cost-effective manner, over time. We call the framework Resource Efficient Decarbonization.  

To date, NYSERDA has partnered with 27 commercial and multifamily real estate owners who have committed to eliminate carbon emissions from some of New York State’s tallest and most iconic buildings. These partners have pledged to decarbonize over 128 million square feet of space, and more than 3,500 units of affordable housing. The scale of these partner commitments and the early success of EBC demonstration projects sends a clear signal that New York’s real estate industry is ready to accelerate investment in the buildings of the future.  

Beyond these commitments, EBC partners collectively control and manage over 400 million square feet of real estate in New York.  This amounts to over 20% of commercial office space in New York City, and more than 200,000 housing units throughout the State, representing a potential for impact much greater than the sum of its parts.  The lessons learned during the planning, design, and implementation of EBC projects pave the way for the most viable solutions to gain traction and scale throughout the State, reinforcing progress toward the Climate Leadership and Community Protection Act’s goal to reduce greenhouse gas emissions 85% by 2050. 

Discover the Empire Building Challenge

Visit NYSERDA EBC Site(opens in new window) Explore Pitch Deck(opens in new window)
View Launch Webinar(opens in new window)

Read About Real-World Impact

Understand the real-world implications and successes of the Empire Building Challenge through this in-depth article, “How to get New York City’s biggest buildings to zero carbon,” by Canary Media. This piece highlights the practical steps and measures being taken to reduce carbon footprints across New York’s architectural landscape, showcasing the challenge as a beacon for carbon-neutral aspirations worldwide.

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