IMEG provided mechanical, plumbing, and fire protection engineering, and energy modeling for the total renovation of this historic, 90,000-sf building built in 1933. The project was designed with a Deep Energy Savings Retrofit target of 50% energy reduction relative to the building’s existing consumption and received a LEED v4 Gold rating.

The project decoupled the building from the district steam heat source. Marshall Hall is now equipped with high-efficiency condensing boilers. The perimeter steam radiators, gravity unit ventilators, fan coil units, and all steam and condensate piping were replaced with a building-wide hydronic heating system with occupancy-based controls, sized to be compatible with a future geothermal-sourced heating system.

This project provided cooling to all spaces via a new heat pump loop and ventilation is provided via demand controlled energy recovery ventilator units. Occupancy sensors can tailor ventilation airflow rates to each space to maximize energy efficiency.

All lighting and power were replaced in the building. Lighting features energy efficient lighting utilizing LED technologies. Historical light fixtures in the main lobby and spiral stairwell were refurbished and revamped to be more energy efficient. A 100A, 408/277V-3Phase-4Wire diesel emergency generator was provided to serve the life safety loads in the building.

New telecommunication systems were provided, as well as a new fully-addressable fire alarm system. Card access and security systems were replaced.