Krieger-Maryland Halls

At the Johns Hopkins University Homewood Campus, the renovation of Krieger Hall and Maryland Hall transformed existing academic buildings into state-of-the-art laboratory environments for the Materials Science, Biomedical Engineering, and Chemical Engineering departments. Through a carefully phased construction process, Mueller Associates delivered comprehensive mechanical and electrical engineering solutions that supported the university’s growing research infrastructure while minimizing disruption to ongoing campus operations.

Engineering in Occupied Spaces

The Krieger Hall renovation—Phase I of the multi-building effort—involved the lower two floors and basement of the six-story structure, creating 22 new laboratories and associated support spaces. The remaining four floors remained fully occupied throughout the construction period, necessitating precise planning and coordination to ensure safety, comfort, and continuity of operations.

In Maryland Hall, 20,000 square feet of laboratory space were reconfigured to create 26 new research labs, while three floors above remained active. Mueller’s design approach emphasized constructability, sequencing, and system flexibility to accommodate evolving program needs without impacting adjacent occupied zones.

Systems Designed for Reliability and Research Excellence

Mueller Associates provided complete engineering design services, supported by extensive field investigation and 3D coordination modeling.

Key engineering features include:

• New HVAC systems with custom factory-fabricated air handling units and redundant fans and pumps for critical reliability

• PVC-coated fume hood exhaust ductwork and stainless steel terminal units to ensure chemical resistance and long service life

• Variable air volume (VAV) laboratory airflow control for precision and safety

• New normal and emergency power distribution systems to support high-demand research activities

• Integrated lighting, data, and communications infrastructure designed for modern laboratory environments

Through rigorous coordination between design and construction teams, the project achieved change orders of less than one percent, underscoring the accuracy and quality of Mueller’s documentation and collaboration.

Sustaining a Legacy of Scientific Leadership

The Krieger and Maryland Halls renovations exemplify Mueller’s long-standing partnership with Johns Hopkins University in advancing the performance and adaptability of its research environments. These modernized facilities now provide flexible, high-performance spaces that continue to support cutting-edge scientific discovery in Baltimore and beyond.