L.E. Phillips Memorial Library

Challenge

The L.E. Phillips Memorial Library in Eau Claire, WI, underwent a major renovation and expansion. This award-winning library, the most visited destination in the downtown area, serves as a vital resource for families, the university, and the community. The project involved a 61,000 square foot renovation and a 6,800 square foot addition, preserving the beautiful exterior brick structure and the embodied energy from the original 1974 construction. The facility offers numerous learning opportunities through technology labs, maker labs, and open classrooms. It also features a large multi-purpose room for community events and an upper-level gallery for local and traveling art exhibits. The exterior renovation includes public spaces for markets, gatherings, and art exhibits.

Solution

The lighting systems were upgraded to achieve a 53% reduction below the required 2015 IECC Energy Code, with a lighting power density of 0.51 watts per square foot for the connected load, surpassing the 2021 IECC by nearly 40%. A wireless lighting control system was implemented to optimize energy use through flexible controls, reducing maintenance and simplifying operation. The system, integrated with daylight and occupancy sensors within the luminaires, provided significant upfront cost savings. The team collaborated with trade partners to identify cost savings by reducing secondary control devices and eliminating many low voltage cables and associated labor. This system also established a foundation for utilizing the wireless network for interior data needs.

Outcome

The renovation resulted in substantial energy savings and operational efficiencies. The wireless lighting control system not only reduced energy consumption but also minimized maintenance costs and improved ease of use. The upfront cost savings achieved through the elimination of secondary control devices and low voltage cables were significant. From a sustainability and embodied energy perspective, the reduction in pipe, wire, and resources had a lasting impact on future generations. The upgraded facility continues to serve as a major community resource, hosting various events and providing modern spaces for learning and art exhibits.