Date: May 2025

NEEA and Puget Sound Energy partnered on a winter load flexibility study on Line Voltage Thermostats (LVTs) in multifamily buildings. We aimed to understand the current load shifting potential of LVTs for baseboard heating, learn about building owner and tenant recruitment, and test event strategies to limit customer impact. We identified opportunities to improve future results (such as technology enhancements and building envelope energy efficiency). We installed LVTs and Wi-Fi in two multifamily properties. We educated tenants about how to sign-up and receive participation incentives by responding to surveys throughout the study period. Several event calling protocols were tested (morning/evening, event duration, and event frequency). Utility meter and telemetry data were analyzed to assess impact. We will share findings, key learnings, and next steps to maximize potential for multifamily load flexibility. Additionally, we will highlight coordination between energy efficiency and load flexibility to achieve better customer experience and results.

Speakers:
Hayley Burns, TRC Companies
Tom Smith, Puget Sound Energy
Brenda Hunt, NEEA