Installing a chiller at a VA Medical Center is not a normal mechanical job. The plant has to keep running. Patients on the operating table, in the ICU, and on dialysis cannot tolerate a temperature swing that wouldn't matter in a commercial office building. Infection control standards limit how and where work can happen. The COR walks the site daily. And in a 24/7 patient-care environment, what looks like a straightforward HVAC project in commercial work becomes a coordinated operation that has more in common with surgery than with construction.
This article walks through what makes VA chiller projects different, what the contracting officer and engineering staff actually evaluate, and what veteran-owned mechanical contractors should expect when pursuing this work.
Why VA HVAC Work Is Different
A typical commercial chiller installation can stage materials on a loading dock, shut down a building section, run cranes through the parking lot, and recover any schedule slip in a normal workday. None of those moves are available at a VA medical center.
Patient care never stops
VA medical centers operate continuously. Surgical suites, emergency departments, intensive care units, and dialysis centers run 24/7. Even a planned shutdown of a single mechanical system requires coordination with clinical leadership, redundancy verification on backup systems, and a documented contingency plan. A chiller replacement that takes the central plant offline, even briefly, can force the hospital to defer surgeries and redirect emergency cases to other facilities.
For the contractor, this means every shutdown must be scheduled, approved, and rehearsed. Pre-job coordination meetings — sometimes weekly for the duration of the project — are the norm, not the exception. Failure to attend or to come prepared to those meetings is a fast way to lose the COR's confidence.
Infection control protocol
VA construction work is governed by Infection Control Risk Assessment (ICRA) standards adopted from the broader healthcare construction industry. ICRA Class I work has the lowest infection risk and the lowest control burden. ICRA Class IV work — which includes major mechanical penetrations in patient-care areas — requires negative-pressure containment, HEPA filtration, full PPE, daily monitoring, and documented decontamination procedures.
A 550-ton chiller installation typically triggers ICRA Class III or Class IV controls, depending on the route the equipment and ductwork take through the building. The contractor must develop the ICRA plan, get it approved by VA infection control staff, set up containment before any cutting or coring begins, and tear it down properly when the work is complete. Cutting a corner on ICRA is the fastest path to a stop-work order at a VA site.
Coordination with engineering, infection control, and clinical staff
Beyond ICRA, the contractor must coordinate with multiple VA staff functions:
- Facility engineering — owns the mechanical systems, approves the design, and signs off on commissioning.
- Infection control — approves ICRA, monitors compliance, can stop work if controls slip.
- Clinical leadership — owns the affected patient-care areas and signs off on shutdown windows.
- Safety — owns the construction safety plan, fire watch, and any hot work permits.
- Security — controls badging, escort requirements, and after-hours access.
A successful VA mechanical contractor builds relationships across all of these functions before the equipment shows up on site. A contractor who shows up day one without those relationships will spend the first week of the schedule chasing approvals.
The Engineering Side of a 550-Ton Chiller
A 550-ton chiller is a substantial piece of equipment — typically a centrifugal or screw machine, factory-charged with refrigerant, mounted on isolation pads, and connected to chilled water and condenser water loops. At the VA scale, the project usually involves:
- Demolition of the existing chiller, including refrigerant recovery to EPA standards and disposal of the old unit through a certified vendor.
- Structural verification of the mechanical room floor for the new unit's weight and vibration profile.
- Rigging — often through external walls or roof penetrations, with cranes, jib cranes, or specialized rigging crews coordinated through facility engineering.
- Piping modifications to match the new unit's connection sizes, with full hydronic balancing after commissioning.
- Electrical connections sized for the new unit's full-load amps, often requiring service upgrades or new disconnects.
- Controls integration with the existing building automation system (BAS) — usually a Siemens, Honeywell, Johnson Controls, or Schneider platform, sometimes a mix of legacy and current systems.
- Commissioning to confirm capacity, efficiency, controls response, alarm functionality, and integration with the rest of the central plant.
Each of those steps has its own approval chain inside the VA. A contractor who underestimates the documentation burden — submittal packages, shop drawings, factory test reports, commissioning protocols, O&M manuals, warranty registration — will fall behind on schedule and on payment.
What the VA Looks For in a Mechanical Contractor
The VA awards major mechanical work through a mix of full-and-open competition, SDVOSB set-asides, and small business set-asides under the Vets First mandate. For SDVOSB-eligible work, the contracting officer looks for:
- Past performance on similar scale. Has the firm installed chillers of comparable tonnage in active healthcare environments? CPARS records and reference letters matter heavily.
- Genuine self-performance capability. Under limitations on subcontracting, the SDVOSB prime must perform at least 15 percent of the cost (excluding materials) on general construction. A firm that subs out the entire scope risks default and recompete.
- Insurance and bonding. General liability typically at $2M, performance and payment bonds for the full contract value.
- Safety record. EMR (experience modification rate) below 1.0 is typically expected; OSHA citation history is reviewed.
- Project management depth. A project manager who has run healthcare mechanical work before, a superintendent on site full-time, and a commissioning agent or coordinator who can speak fluently with the VA engineering staff.
A5N Prime's Approach
A5N Prime LLC has performed major mechanical work at the Carl Vinson VA Medical Center in Dublin, Georgia, including a 550-ton chiller installation that required full coordination with hospital operations, infection control, and clinical leadership. The lessons from that work feed directly into how A5N Prime approaches every healthcare mechanical project: pre-job coordination is non-negotiable, ICRA discipline is enforced from day one, and the project manager is the single point of accountability to the COR for the entire duration of the work.
For other firms pursuing VA mechanical work, the path is similar: build the self-performance capability, build the insurance and bonding capacity, build the past performance record on smaller scope first, and treat every VA project as a long-term reference rather than a one-off job. The CPARS rating from a clean chiller installation will open doors to the next mechanical opportunity at the same or another VA facility.
For more on A5N Prime's mechanical capabilities and federal portfolio, see our capabilities and past performance. To discuss a project, contact us.