Balzhiser & Hubbard Engineers provided mechanical, electrical, and energy engineering during the design and construction phases for this renovation and expansion project. Mechanical engineering services include design of HVAC, hydronic, and plumbing systems for the renovation of the existing 59,000 square foot library and an addition of approximately 61,000 square feet. Systems included single duct VAV, dual duct VAV, and heat recovery HVAC, plumbing, fire protection, and steam and chilled water connections to the central campus systems. Special HVAC and fire protection systems included those serving the 2,000 square foot rare book area. Electrical services included the upgrade of existing electrical and network infrastructure in the existing building to support proposed technology needs. A new fire alarm system was designed to address the existing building and the addition. Lighting in the existing building was upgraded and incorporated into the lighting control system installed for the new building. Balzhiser & Hubbard Engineers also managed the modeling and reporting process under the (then) new SEED guidelines using DOE-2.2. A significant challenge associated with this project was that portions of the existing library had to remain in service during construction.