Sterile Processing Service Air Handler Renovation

PCG successfully completed a mission-critical renovation of the Sterile Processing Service (SPS) area in Building 7 of the Alexandria VA Medical Center, replacing the aging AHU-104 with a state-of-the-art air handling system that exceeds VA HVAC and Sterile Processing design standards.

The project required careful demolition, phasing, and coordination to ensure uninterrupted hospital operations. PCG decommissioned the existing AHU-104 and constructed two distinct systems: a dedicated 100% outside air SPS air handler with double-walled construction and UV disinfection and a new HVAC system for non-SPS areas featuring variable volume terminal units and energy-efficient zoning. To support the new AHU, PCG installed a new 55-ton Scroll-Type Chiller on a 575-square-foot reinforced 8-inch concrete slab supported by 11 helical piles. The chiller is housed in a reinforced structural steel louvered enclosure.

The system was engineered to meet the VA’s stringent Physical Security and Resiliency requirements for Mission Critical Systems. The project also included essential power upgrades including panelboards, VFDs, breaker upsizing and fire alarm and security modifications. Architectural work involved ceiling replacement throughout the SPS area, wall and flooring repairs, and the careful protection and reconnection of sensitive security and communications systems.