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ACEEE | American Council for an Energy-Efficient Economy
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ACEEE’s work spans six core focus areas and a range of related topics. Explore the issues shaping energy efficiency today.
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Focus Areas
Affordability and Energy Equity
Behavior and Health
Energy Efficiency Policy
Homes and Buildings
Industry and Manufacturing
Transportation
Utilities and the Power Sector
Featured Research Topics
Appliances and Equipment
Building Policies and Codes
Data Centers
Decarbonization
Industrial Heat
Low-Income Energy Efficiency Programs
Homes and Multifamily Buildings
Efficiency, Flexibility, and Rate Design Programs
See all
Research & Publications
Toggle
Research Reports
Briefs
Toolkits
Fact Sheets
Public Filings & Testimony
Scorecards
Events
About
Toggle
What Is Energy Efficiency?
About
People
Careers
Our Impact
Donate
Join
News & Insights
Summer Study Proceedings Papers
Search
Search
Summer Study Proceeding Paper
Buildings
2026
Expanding Electrification Pathways in Multifamily Housing Through Cold- Climate Window Heat Pumps
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