2021 Impact Report

Our Mission: Accelerating Climate Solutions. for everyone.

2021 was a big year for Slipstream. We launched a newsletter for energy professionals. We held an all-virtual Better Buildings: Better Business Conference for our partners to continue learning despite an ongoing pandemic. We transformed our headquarters into a public test bed for Grid-Interactive Efficient Buildings (GEBs).

Most importantly, we grew our organization’s impact through new programs, and a wider range of work.

We also recommitted to our core values:

  • Champions of Equity. Our climate work must lift communities so that everyone experiences a brighter, more resilient future. We hold ourselves accountable to principles of Equity, Diversity and Inclusion and are prepared to transform into the anti-racist, fully inclusive organization we strive to be.
  • Collaborators. Climate change is a collective problem that requires collective solutions. We are grateful for the dedication of our colleagues and partners who broadened our impact in 2021.
  • Change-makers. A commitment to climate and equity requires curiosity and courage—the imagination to develop new ideas and the resolution to get them out into the world. Our best work is yet to come.

measuring our impact

Slipstream’s three areas of focus form a circle that broadens impact, identifies new barriers, and uncovers new approaches to climate solutions.

  • Research and Policy: We discover, prove, and scale the technologies and tactics to cut carbon throughout our communities and across sectors.
  • Fair Clean Energy Finance: Outcome-driven equitable energy finance solutions pave the way for a fair clean energy future.
  • Accelerator for Programs and Education: Effective climate solutions must benefit as many people as possible. We design and deliver programs to impact communities at scale and deliver training and education to advance the clean energy workforce.


UN Sustainable Development Goals & Project Drawdown

We have the skills, knowledge, and drive to fight the climate crisis. We can’t do it alone. We stand in solidarity with national and international climate leaders to accomplish our goal. This report notes where our annual impacts align with two international blueprints to reverse climate change and build a more equitable future.

We encourage other organizations to join us in new areas that we believe can make a big impact on existing frameworks. To that end, we propose these new solutions for Project Drawdown:

  • Grid-Interactive Efficient Buildings can maximize the use of renewable electricity generation, while minimizing the use of fossil fuels to power the grid
  • Fair Energy Financing can help people of all economic levels access the benefits of clean, healthy environments


A clean future for everyone demands new climate solutions. Our 2021 Innovations represent valuable ideas or breaks from typical practice that can impact energy programs today. These are tested, practical solutions that governments, utilities, and building owners can adopt to scale decarbonization, expand equity, and develop the clean energy workforce.

A proven way to scale new, Phius-certified affordable housing in the Midwest

Using what we learned from a study in Chicago, we designed a program for a major midwestern utility to build new affordable housing according to Phius (Passive House) standards. This will expand the equitable decarbonization and electrification of multifamily housing. In 2021, the program initiated five projects totaling just under 200 new affordable housing units.

Higher emissions performance from C-PACE

The City of Milwaukee sought to motivate C-PACE borrowers to maximize energy savings in financed projects. Our engineering experts defined standards that would allow C-PACE financing terms to value exceptional energy performance. Together, the first two projects will achieve annual GHG emissions reductions of over 1,500 metric tons of CO2e.

Smart valves for more efficient hydronic cooling

In the right type of commercial buildings, smart pressure independent control valves (PICV) can save anywhere from 100,000-700,000 kWh in just the first year. We partnered with a major midwestern utility to demonstrate the performance of PICV, addressed barriers to adoption, and developed recommendations to deploy the technology in utility programs nationwide.

80,000 high school students learn about clean energy careers

We partnered with Wisconsin educational organizations to develop a clean energy careers series for high school teachers and students—the first clean energy career lessons that the WI K-12 Energy Education Program (KEEP) created for its stakeholders. The state’s Department of Public Instruction and the Cooperative Educational Service Agency (CESA) integrated the series into a Virtual Careers Symposium that attracted 80,000+ students and will continue through the 2023 school year.

Healthier improvements to affordable housing for Low Income Housing Tax Credit projects

About 90% of newly constructed subsidized affordable housing in the U.S. receives the Low Income Housing Tax Credit (LIHTC). Many such buildings are funded through the “4% LIHTC credit,” which is usually not enough to cover renovation costs plus beyond-code energy efficient systems. We adapted an approach to affordable housing new construction to provide teams greater flexibility within tight budgets. This helped partners afford measures to advance efficiency and sustainability for income-eligible residents for decades to come.


Social Impacts

We make sure our programs put people at the center, and:

  • Improve health and well-being for members of the community we serve
  • Drive access for communities that traditional approaches often leave behind
  • Combat energy inequity in frontline communities
  • Lower greenhouse gas emissions in the environment
  • Save people money that can be used to build community wealth

By the Numbers


in financing for energy efficiency and renewable energy to help people with low and moderate incomes improve their homes, lower their energy costs, and breathe cleaner air.


in energy bill savings for people with low incomes.

How we did it

We design programs to drive affordable housing new construction. We help our clients build comfortable, healthy homes that people want to live in. Our allelectric homes improve indoor air quality and eliminate the harmful effect of gas hookups. When something is designed for deep energy savings the first time around, infrastructure dollars can go to where they’re really needed.

Our largest residential new construction program supported 623 units in 2021. 94% were affordable housing units.

We supported the development of a large building on the South Side of Chicago to offer affordable housing for senior citizens. The South Side of Chicago (and especially Englewood) has been overlooked. The neighborhood is a food desert and there’s been little investment in the community.

Residents now enjoy clean, healthy housing with amenities like a library, laundry, and community rooms to host events. After the building opened, grocery stores started to open, and more infrastructure dollars have been invested in the community. This lays the groundwork to expand future affordable housing programs.

Rural energy burdens are three times the national median. Members of rural communities often find programs inaccessible because of upfront cost barriers and inaccessible finance offerings. We listened to the community’s needs and connected people in rural communities with $3.4M in rebates to achieve their clean energy and energy efficiency goals in 2021. Nearly $1M of these rebates went to residential HVAC systems—270% of our goal. More people now have access to air source heat pumps and other clean energy technology.

People are not defined by credit scores or debt—to—income ratios. Traditional lending models don’t look beyond those numbers to see the person.

Slipstream’s Energy Finance Solutions (EFS) connected businesses and homeowners to financing resources in New York, Illinois, New Jersey, and Michigan to fund over 15,000 renewable and efficiency projects in 2021. We don’t stop there. We help our partners become more inclusive in their financing approach to drive access for more people.


Environmental Impacts

The Intergovernmental Panel on Climate Change reports that slashing carbon and other GHG emissions by 2030 is the most important step to avoid the worst of climate change. Slipstream has been hard at work to achieve these goals.

By the Numbers


metric tons of avoided NOx emissions

How we did it

Our research bench strength, our education and training know—how, and our innovative program and finance solutions help us work toward equitable market transformation. We inspire commercial developers and design professionals to get building decarbonization done.

We helped save 6 million more kWh in 2021 than 2020. At the same time, we reduced emissions by 13,000 fewer metric tons in 2021 compared to 2020. As the grid gets cleaner, we will see fewer emissions savings from energy savings alone—a sign that we’re on the path to a carbon-free future.

Two of our major retail lighting programs saved 196 kilotons of CO2. At the end of 2021, we retired two of these programs because the market had been transformed. Our urgent action gets results and transform the market.

The Illinois C-PACE program we support increased CO2 savings by 4,000% from 2020 to 2021, going from 774,000 lbs saved to 33M lbs. In 2020 the program closed just 2 projects worth $3.3M. In 2021 the program closed 8 projects worth $47 M. This shows the growth in market interest in just one year. Clean energy buildings are gaining momentum, and we're helping people finance solutions that weren’t previously available to them.

People living in manufactured homes have been some of the most impacted by the COVID-19 pandemic. With this in mind, we transformed our program approach to focus on the relationship between health and energy. We produced a video series to give residents of manufactured homes DIY energy efficiency tips in English and Spanish. We reached 22,744 people in English and 272 people in Spanish for a collective 23,016 residents empowered to make their manufactured homes healthier and more resilient against climate change and GHG emissions.


Economic Impacts

Lowering energy use doesn’t just reduce carbon emissions. It cuts utility bills to lower energy burdens and help businesses and customers thrive.

By the Numbers


in total energy bill savings.


in total energy bill savings.

How we did it

We found energy savings beyond traditional lighting program approaches. In 2021, we shed light on new opportunities by:


As we identify barriers to energy equity, we find solutions. Slipstream and our partners help thousands of people find the power to make a greater impact where they live, work, and play to drive progress faster for more people—together.

Fair Energy Finance

People want clean energy solutions. They can’t always afford them. Slipstream’s EFS helps people and businesses break through financial barriers. We continued our inclusive underwriting practices and worked with our clients to establish new finance pathways for people with low incomes.

In July 2021 we launched a new program with a client in the Northeast that offers 10 year loan terms for people with lower incomes instead of the standard 7 year loans. This market offers 0% interest loans to all customers, but for people with lower incomes, the high monthly payment can sometimes prohibit participation. By extending the loan term, we lower that monthly payment to improve access. We issued 40 loans in six months for people who would have otherwise been unable to make clean energy upgrades with the former loan offering.

Our C-PACE programs provided $53.2M in financing for 21 clean energy projects across 47 counties. We also revised the PACE Wisconsin program guidelines in 2021 to include more sustainability projects than ever before.


Knowledge is power.

More people have the know-how to help drive the clean energy transition because of our education and training. We nearly doubled our reach from 2020 to 2021 through:

  • Virtual learning platforms
  • Online energy modeling tools
  • YouTube videos

Buildings account for 40% of CO2 emissions. We gave 10,193 building professionals more skills to lower that impact in 2021 through:

  • 3,117 video views
  • 1,992 weatherization pros trained
  • 2,225 webinar participants
  • 2,859 USGBC course completions

77% of those pros intend to implement what they learned. We had a 95% promoter score. Each of these 10,000+ pros now have the power to drive us toward an equitable clean energy future.

Battered obstacles to lift energy burdens and expand community resilience.

We launched a program to put households with low incomes—including those in manufactured homes—on the path to electrification. We proved the link between healthier homes and healthier people.


Our research widens our impact on climate and equity with new approaches and insights

Prepared the market for transformative technologies and programs.

Slipstream is laying the groundwork to deliver GEBs at scale. We are empowered to establish a scalable business model for GEBs through the Department of Energy’s Connected Communities Initiative, and we have been proving GEB technologies in multiple test beds—including our Madison headquarters.

We started a new program to educate and train distributors and contractors to install more ASHPs in Illinois. Our market transformation informed new programs in other Midwest states, including Wisconsin.

Provided technical expertise to inform fair, effective climate policy

Our staff leveraged our expertise to contribute to policy milestones in 2021 by providing:

  • Technical input for Illinois’ 2021 Clean Energy Jobs Act (CEJA). Slipstream performed a range of technical analysis to estimate and quantify the impacts of various strategies in the development stage of the legislation, which ultimately passed in September.
  • Guidance for widespread electric vehicle (EV) adoption. As policymakers engaged more with EV market transformation, Slipstream monitored legislation at state and federal levels and strategized with partners regarding how states and local government could optimize the benefits of policies surrounding EVs and EV infrastructure
  • Core contributions to Wisconsin’s first Clean Energy Plan! Slipstream led technical analysis for the core team that created Wisconsin’s first Clean Energy Plan, unveiled in April 2022.
  • Recommendations to the City of Chicago on Building Decarbonization. Buildings account for 70% of the City of Chicago’s total GHG emissions. To support their climate action plan, the city established a building decarbonization working group. Slipstream had representatives on the working group to provide recommendations for how the City of Chicago could meet their ambitious decarbonization goals.


Program Revenue 42,390,020
Other Income 6,033,504
Total Revenue, Support, and Gains 48,423,524
Efficiency at Scale 26,452,995
Financing for a Low-Carbon Future 2,352,487
Emerging Technologies and Human Factors 1,892,248
Training and Education 1,607,698
Total Program Expenses 32,305,428
Management and General 8,333,865
Fundraising and Business Development 1,692,718
Total Supporting Services Expenses 10,026,583
Total Expenses and Losses 42,332,011
Manufactured Home

With 2021 in the rearview mirror, we are full speed ahead for 2022. Visit our website to learn more about the latest ways we accelerate climate solutions for everyone.

Stay ahead of the curve on climate solutions with our newsletter, The Accelerator.

Subscribe here

Follow us on social media: