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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.
Split Systems: Coordinating Energy Policies for New and Existing Buildings
ACEEE and the National Energy Codes Collaborative examine conflicts and alignments between building codes and Building Performance Standards in Atlanta, St. Louis, and Seattle. The authors derive lessons for other cities to ensure policies to decarbonize new and existing buildings are measuring against similar performance metrics and minimizing unnecessary bureaucratic hurdles.
Investing in Workforce Development and Training to Improve Energy Code Implementation
ACEEE and the National Energy Codes Collaborative identify barriers to implementation of building energy codes and suggest strategies for training the workforce from project initiation to closure to overcome these barriers.
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.
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
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.
Electricity Rates that Keep Bills Down after Electrification of Home Heating
New research from the American Council for an Energy-Efficient Economy (ACEEE) identifies commonsense electric utility rate reforms that will keep households from seeing increased bills when switching home heating from fossil fuel–fired systems to heat pumps in some of the coldest U.S. states.
45L and 25C Energy Efficiency Tax Credits Cut Household Costs
Two federal tax credits are helping homeowners around the country save money on energy bills. These fact sheets provide new analysis on the benefits these credits deliver.
Retrofitting America’s Homes: Designing Home Energy Programs that Leverage Federal Climate Investments with Other Funding
This white paper identifies strategies that policymakers, efficiency program administrators, and other decision makers can use to support home energy efficiency upgrades by braiding and stacking new federal funds with existing state, local, utility, and other resources.
The Value of Prioritizing Equitable, Efficient Building Electrification
This study systematically analyzes the costs and benefits to LMI households and to society at large of efficient electrification, including both installation and operation of residential space heating, water heating, and other equipment.
Nobody Left Behind: Preliminary Review of Strategies to Support Affordable Housing Compliance with Building Performance Standards
This report identifies strategies that local governments, community-based organizations, energy utilities, and other stakeholders can use to support affordable housing properties and their residents during the design and implementation of BPS policies.
Analysis: Electric Heat Pumps Offer Cheapest Clean Heating Option for Most U.S. Houses
An analysis of the ACEEE's report on how electric heat pumps offer the cheapest way to cleanly heat and cool single-family homes.