Grace Lewallen

Senior Research Analyst; Behavior, Health and Human Dimensions Program

Grace Lewallen conducts applied behavioral science research on how human decision-making and behavior shape energy efficiency outcomes. Her work draws on qualitative and mixed-methods research, behavioral diagnosis, systems thinking, and human-centered design to identify barriers and drivers, develop behaviorally informed interventions, and translate findings into practical program and policy recommendations. Through ACEEE’s BEAR Hub, she provides behavioral science technical assistance to utilities, government agencies, and other organizations working to improve program design, implementation, and evaluation. Grace joined ACEEE in 2023.
Prior to joining ACEEE, Grace worked at environmental behavior change organizations, where she conducted applied research on sustainable consumer decision-making and developed capacity-building trainings to help environmental practitioners apply behavioral science to real-world challenges.
Grace holds a master of behavioral and decision sciences from the University of Pennsylvania and a Bachelor of Arts in German language and international trade from Clemson University.

Authored by Grace Lewallen

Electricity Rates that Keep Bills Down after Electrification of Home Heating
  • Research Report
  • Behavior and Health
  • Homes and Buildings

    • Electricity Rates that Keep Bills Down after Electrification of Home Heating

    This report examines how electricity rate design, energy efficiency upgrades and behavioral strategies can make home heating electrification with heat pumps more affordable. It finds that heat pump–specific rates, winter discounts and efficiency improvements can lower household energy costs while helping utilities and policymakers overcome financial and nonfinancial barriers to residential electrification.

    Apr 23, 2025

    Matt Malinowski, Reuven Sussman, Paul Mooney, Grace Lewallen

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