If you manage a hyperbaric chamber, chances are you’re familiar with Annual Preventive Maintenance (PM) — but what about a Mechanical Overhaul (MOH)? When a service is due, how do you know whether a standard PM will do the job or if your chamber needs something more extensive?
This question isn’t just about timing — it’s about risk, compliance, cost control, and patient safety. Too many facilities assume a yearly PM is enough to stay inspection-ready and operational, when in reality, they’re operating with aging seals, outdated gauges, and components well past their intended life cycle.
At BaroServ, we help facilities make this decision every day. And here’s the truth: an MOH is not just a “big PM” — it’s a completely different level of service with a very different purpose.
What Is Preventive Maintenance (PM)?
A PM is a routine annual service visit, typically recommended by both NFPA‑99 and most OEMs. It’s designed to ensure your hyperbaric system is functioning properly, safely, and compliantly on a regular basis.
A typical PM includes:
- Leak testing and pressure verification
- Valve inspection and calibration
- Cleaning and lubrication of moving parts
- Electrical system and alarm checks
- Acrylic window cleaning and surface inspection
- Basic part replacements (filters, gaskets, etc.)
PMs help facilities stay compliant with inspection bodies like The Joint Commission or DNV and prevent minor wear-and-tear issues from escalating. It’s essential — but it’s not enough for aging chambers.
What Is a Mechanical Overhaul (MOH)?
A Mechanical Overhaul, or MOH, is a 10-year milestone service that involves a full disassembly and reset of your chamber’s mechanical components.
MOHs are far more comprehensive and typically include:
- Replacement of all seals, valves, and gauges
- Full tear-down and inspection of pressurized systems
- Internal cleaning of piping, regulators, and oxygen supply lines
- Recalibration of pressure control systems
- Reassembly with documented compliance under NFPA-99 and PVHO-2
Why 10 years? Because that’s the average operational lifespan of core components under daily use. After 10 years, parts may still appear functional but no longer meet safety standards or compliance thresholds. OEMs and independent providers like BaroServ both agree: MOHs are necessary to extend the life of your chamber and protect your investment.
How to Know Which One You Need
You may only need a PM if:
- Your chamber is less than 10 years old
- You’ve had consistent, documented annual service
- There are no recurring leaks, pressure drift, or performance concerns
- Your documentation is complete and shows no missed cycles
You likely need an MOH if:
- Your chamber is approaching or past 10 years in service
- You’ve never had a full overhaul
- You’re experiencing slow pressurization, sticking valves, or oxygen delivery issues
- Acrylics or gauges haven’t been replaced in over a decade
- Surveyors have flagged mechanical performance concerns
- Your chamber sees heavy daily use (4–5+ treatments per day)
BaroServ evaluates your service history, cycle count, and component condition to recommend the right course of action — no guesswork, no unnecessary service.
Why This Matters
Putting off a necessary MOH can lead to:
- Compliance citations from NFPA-99 or PVHO-2
- Fire or pressure hazard from deteriorated components
- Unplanned downtime and emergency repairs
- Treatment cancellations that affect patient care and revenue
- Failed audits or accreditation setbacks
Facilities that assume “we’re fine” with just a PM every year may end up facing major system failures that a scheduled MOH would have prevented — at a fraction of the cost and downtime.
What BaroServ Recommends
We don’t just follow a calendar — we follow the chamber.
BaroServ reviews your:
- Chamber model and install date
- Prior service and inspection logs
- Usage volume (cycle frequency)
- OEM maintenance history
- Logbook accuracy and PM records
Based on this, we recommend either:
- A scheduled PM with standard compliance testing
- OR a 10-year MOH, including a service timeline, quote, and clear breakdown of what’s replaced
Our MOHs average 3–4 day turnaround, with audit-ready documentation and OEM-part access — so you’re not stuck in a months-long service window.
Don’t Let Routine Service Turn Into a Risk
Preventive maintenance is essential — but once your chamber crosses the 8–10 year mark, it’s time to look deeper. An overdue MOH can’t be solved with a routine PM, and waiting too long puts your facility — and your patients — at risk. BaroServ helps hospitals and wound care programs across the country make informed decisions about the health and longevity of their chambers. We don’t just provide a service — we protect your system, your staff, and your reputation.
Contact BaroServ today to review your chamber’s service history and determine whether a PM is sufficient — or if your program is due for a mechanical overhaul.
BaroServ: Premium Hyperbaric Chamber Maintenance. Faster. Safer. Certified.
