Is your cooling equipment aging faster than you think?
Why equipment age is not just a number
Do you know how old your CRAC or CRAH units really are?
The answer is not always as simple as checking the installation date or reading the nameplate. In critical cooling, a unit's real age is shaped by how hard it has been working, how it has been maintained, and the conditions under which it has been operating.
Two units installed on the same day can be in very different condition years later. One may still be operating close to its expected lifecycle. The other may already show the wear profile of a much older system.
What accelerates aging?
Cooling equipment can age faster than expected when operating conditions, maintenance routines, or system parameters deviate from the original design intent.
In practice, several common factors can accelerate wear.
1. Deferred or reduced maintenance
When maintenance is delayed, reduced, or skipped, wear can build up across all major components. Small issues that would normally be spotted early can develop into larger risks over time.
2. Low refrigerant charge in DX systems
A DX system running undercharged can force the compressor to work harder than intended. This increases stress on the compressor and can shorten its operating life.
3. Poor water quality in CW or GE systems
In chilled water or glycol systems, water quality matters. If the water or glycol quality is out of specification, scaling, corrosion, and fouling can develop in heat exchangers and pipework. This can silently reduce efficiency, heat transfer and long-term reliability.
4. Running above design or manufacturer specification
When units are pushed beyond their intended operating envelope, fans, compressors and other moving components experience additional mechanical stress. Over time, this can accelerate fatigue and increase the chance of failure.
5. Irregular filter changes
Restricted airflow makes fans work harder. That increases load on bearings and fan assemblies and can significantly reduce fan life. It can also affect the overall performance of the cooling system.
Why this matters in a data centre
In a data centre, cooling is not a comfort system. It is a critical asset protection system.
Accelerated aging can mean earlier failures, reduced warning time and higher risk to the IT load. A unit that is “only” eight years old on paper may, under the wrong conditions, behave more like a twelve- to fifteen-year-old system in real operating condition.
That is why the true condition of the equipment matters more than the installation date alone.
Understanding the true condition
A useful lifecycle view looks beyond the unit's age. It considers the maintenance history, refrigerant charge, operating parameters, water or glycol quality, filter regime and how closely the system still matches its original design and manufacturer specifications.
This gives a more realistic picture of risk. It also helps identify where action can extend equipment life, improve reliability and reduce the chance of unexpected failures.
The STULZ approach
STULZ can help assess the real condition of existing CRAC and CRAH equipment, not just its age on paper.
Depending on the installation, this can include:
1. Site assessment and operating review
A review of the equipment condition, maintenance history, operating parameters and any signs of accelerated wear.
2. Refrigerant and system checks
For DX systems, this can include reviewing charge levels and operating behaviour to identify whether compressors are being placed under unnecessary stress.
3. Water or glycol quality checks
For CW or GE systems, water quality can be reviewed to identify risks such as scaling, corrosion or fouling, with treatment recommendations where needed.
4. Review against original design conditions
The installation can be checked against original design and manufacturer specifications to understand whether the equipment is still operating within the intended envelope.
5. Maintenance and filter regime audit
Maintenance routines and filter replacement intervals can be reviewed to identify practical improvements that support reliability and lifecycle performance.
The goal is simple: to understand how your cooling equipment is really aging and to put a practical plan in place before minor issues become operational risks.
Look beyond the nameplate
If your cooling equipment is aging faster than expected, the installation date will not tell the full story.
A lifecycle review can help identify hidden risks, protect equipment life and keep cooling capacity available for critical loads.
More in our Cooling Practice series:
Cooling Practice 1
Why high pressure alarms return every summer.