SUNY Downstate Health Sciences University, Brooklyn's only academic medical center, faced growing concerns with five aging rooftop air handling units (AHUs) serving critical hospital departments. More than 20 years old and utilizing obsolete R-22 refrigerant, the systems were approaching the end of their useful life and required modernization to improve reliability, energy performance, and indoor air quality while supporting future facility needs.
RMF conducted a comprehensive assessment of the existing systems, including airflow and pressure testing, ventilation analysis, heating and cooling load calculations, code review, and evaluation of electrical and building automation infrastructure. Working closely with SUNY Downstate and the State University Construction Fund, RMF developed a phased implementation strategy and feasibility study that balanced operational requirements, energy efficiency, constructability, and long-term flexibility.
Year2025
LocationBrooklyn, New York
ServicesMEP Building Engineering
MarketHealthcare, Higher Education
Based on the findings, three AHUs serving Labor & Delivery, the Neonatal Intensive Care Unit (NICU), and PIRR/MRI departments were selected for replacement. RMF designed custom variable air volume air handling units with increased outside air capacity, upgraded filtration, ultraviolet germicidal lighting, and new reheat system components, including heat exchangers, pumps, and associated controls. The systems were intentionally sized to accommodate future renovations and evolving healthcare requirements while enhancing indoor air quality and patient safety.
Because the affected clinical areas operate continuously and support highly sensitive patient populations, uninterrupted hospital operations were a primary project driver. RMF developed a three-phase construction approach that utilized newly installed equipment to provide temporary air service while existing units were replaced. Careful coordination of construction sequencing, utility connections, and rooftop staging enabled the hospital to maintain 24/7 operations throughout the project despite the site's constrained urban footprint.
The completed modernization project increased airflow capacity by approximately 10 percent, improved system reliability, enhanced infection-control measures, and positioned the facility to meet future patient care and operational demands.
Highlights
Replacement of aging R-22 AHUs serving critical hospital departments
Enhanced ventilation, filtration, and indoor air quality
A three-phase construction approach maintained continuous operation of Labor & Delivery, NICU, and MRI/PIRR spaces
Temporary air systems and coordinated sequencing minimized operational disruptions