- Critical systems
- Hygienic air handling units, chiller and pump groups, HEPA-filtered supply, fan coil and VRF comfort systems
- Critical areas
- Operating room, intensive care, isolation rooms, sterile supply unit, laboratory
- Maintenance frequency
- Monthly checks and filter tracking on critical-area air handling units; seasonal and comprehensive annual maintenance on chillers and pumps
- Key risks
- Disruption of the pressure regime, filter leakage, microbial growth in humidifiers and drains, failure of non-redundant equipment
- Records and traceability
- Measurement values, replaced parts and nonconformities are reported at every maintenance visit
HVAC in hospital facilities
Although a hospital's air conditioning system looks like a single structure, it is in fact the sum of areas with different needs. Outpatient clinic corridors and administrative sections are usually conditioned for comfort with fan coils or VRF. Operating rooms, intensive care, sterile supply and isolation rooms, on the other hand, are fed by separate hygienic air handling units; in these areas the target is not only temperature but also the number of air changes, the filtration stage, the humidity range and the pressure difference between rooms. Central cooling is mostly provided by chiller groups, and heating by boiler or heat pump systems. A fault in these areas affects not only comfort but also the surgery schedule and patient safety.
The direction of airflow in critical areas is part of infection control. Operating rooms are kept at positive pressure relative to their surroundings so that air from the corridor does not enter the sterile area. Rooms where infectious patients are isolated operate at negative pressure, preventing contaminated air from spreading to the surroundings. Hygienic air handling units use multi-stage filtration; the final stage usually has HEPA filters. For this reason monitoring filter pressure drops, checking gasket and frame sealing, and verifying differential pressure gauges are an integral part of routine maintenance. When differential pressure values are recorded, deviations over time are noticed early.
The most distinctive feature of hospital systems is their very low tolerance for downtime. For this reason a redundant (N+1) structure is preferred for chillers, pumps and air handling unit fans, and maintenance is done in sequence while the standby equipment is in service. The maintenance plan is prepared together with the hospital's technical department and infection control team; interventions in critical areas are timed according to the surgery schedule and patient load. Parts that come into contact with water, such as humidifiers, drain pans and coil surfaces, are cleaned and disinfected regularly because of the risk of microbial growth. Freeze protection on outdoor chillers and pipes before winter, and condenser cleaning before summer, are planned separately.
In applications, hospital hygiene standards, the relevant legislation and the institution's own infection control procedures are the basis; international references such as DIN 1946-4 are also frequently used. For us, the most important part of the job is traceability: the work done, filters replaced, values measured and nonconformities found are reported at every maintenance visit. These records contribute directly both to the technical department's planning and to the documents requested in audits. This makes it clear where to continue at the next maintenance and which equipment needs renewal.
Our services for this sector
Air handling unit maintenanceFilter replacement, fan and belt, coil and hygiene.
Chiller maintenanceCondenser, compressor, refrigerant leak test and measured report.
Fan coil maintenanceFilters, coil, drainage; bulk maintenance by unit.
VRF air conditioning maintenanceOutdoor and indoor unit maintenance, pressure measurement, fault code analysis.
Annual maintenance contractScheduled maintenance, priority on breakdowns, single price.
Public maintenance tendersService that meets the specification, ready documents.
Breakdown and repairbreakdown and service line, all brands and systems.How do we work?
In hospital projects we start with an inventory of the existing system and a list of critical areas. Together with the technical department we draw up the maintenance schedule and time interventions in critical areas according to the surgery and patient schedule. On redundant equipment we perform maintenance in sequence, working without stopping the system. Our teams are OHS-trained and comply with in-hospital working rules. For facilities in Ankara, our teams are in the field every day and we respond to fault calls the same day. For facilities outside Ankara, we send a planned team from Ankara; we work on a project, annual contract and public tender basis. For contracted facilities, we plan the maintenance schedule in advance; in an urgent situation, the team dispatch time varies with distance.
Checklist forms for chillers, fan coils, air handling units, VRF and other equipment.See the forms
Frequently asked questions
How often should operating room air handling unit maintenance be done?
The exact interval is determined by the institution's infection control procedure and the equipment. In general practice, filter pressure drops and differential pressures are monitored regularly, the air handling unit is checked monthly, and filters are replaced when they reach the specified pressure drop or at their scheduled interval.
Does the operating room have to close during maintenance?
Not every intervention requires closure. Work on the critical-area air handling unit is planned for hours outside the surgery schedule; on redundant equipment, maintenance is done in sequence so the system stays in operation.
Why are negative and positive pressure rooms important?
Positive pressure prevents dirty outside air from entering the sterile area, while negative pressure prevents air in an isolation room from spreading to its surroundings. If the pressure regime is disrupted, infection control weakens; for this reason differential pressures are measured regularly.
What documents do we receive after maintenance?
A service report is provided that includes the work done, the measured values, the filters and parts replaced, and any nonconformities found. These reports form a basis for the technical department's records and for audits.
Do you take part in tenders for public hospitals?
Yes. We hold the TSE Service Qualification Certificate and ISO certificates required in public maintenance tenders; we work according to the maintenance intervals and reporting requirements defined in the specification.