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Decarbonizing Space Heating in Existing Centrally Heated Multifamily Buildings
This report discusses these and other decarbonization options for centrally heated multifamily buildings, analyzing the life-cycle cost of the different options and providing examples of installations using each of these options.
The Landscape of Building Performance Standard Pathway Alternatives
The report provides a landscape assessment of existing BPS compliance and ACPs offered across the nation using a common taxonomy, and identifies key challenges.
Estimating the Impacts of Weatherization Readiness Programs
WAP and some utility programs provide energy efficiency retrofit services at no cost to qualifying households. Participation in these programs, however, is often hampered by existing home conditions and repair needs that restrict the ability of implementors to install energy saving equipment and measures.
Northeast High-Performance HVAC Market Assessment Report
NEEP published a new market assessment today that shows a strong and growing market for high-performing air source heat pump (ASHP) equipment in the Northeast.
Thermal Energy Networks in the United States: Emerging Opportunities, Challenges, and Needs
Transformative Strategies and Common Spark Consulting examine the policy landscape, ownership models, equity and environmental justice perspectives, and energy democracy perspectives on thermal energy networks.
The Potential for Alternative Fuels in Building Decarbonization
ACEEE’s study analyzed costs and emissions for decarbonizing buildings through electrification and alternative fuels for combustion, like biomethane from landfills or livestock manure or synthetic gases made from hydrogen and other chemical compounds.
Building with Biomass: A New American Harvest
This report sheds new light on a powerful and cross-cutting solution: manufacturing building products from upcycled biomass that’s already abundant across the United States.
2025 State Policy Watchlist
Our 2025 State Policy Watchlist offers a concise breakdown of what to watch and why it matters for public affairs professionals navigating these evolving challenges.
ACEEE Annual Report 2024
From securing federal appliance efficiency standards that will save households nearly $1 trillion to helping localities build transportation systems that meet community needs, ACEEE initiatives are helping tackle today’s energy challenges
Reforming Residential Energy Efficiency Incentive Programs: Best Practices and Legislative Options
This report presents best practices for program administrators, utility regulators, policymakers, and advocates to make energy efficiency programs more simple, market-friendly, durable, and equitable.
Testing HPWH in Manufactured Housing
AESC will measure whether the HPWHs' cool exhaust air can lower existing air conditioning costs and improve resident comfort and will quantify the energy, cost, and GHG impacts of the retrofits.
2025 State Energy Efficiency Scorecard
The top finishers in the 2025 scorecard are California, Massachusetts, and New York, with Maryland and Vermont tied for fourth place. Colorado, Louisiana, and New Jersey are among the most improved states since the last scorecard.