How to Monitor SLA Thermal Compliance in Colocation Data Centers
Thermal SLAs in colocation facilities are often overlooked but can have long-term consequences for server health and operational efficiency. This post outlines how operators can better understand, monitor, and manage thermal SLA compliance — including the role of independent audits and real-time monitoring tools like Purkay Labs' AUDIT-BUDDY system.
Understanding Service Level Agreements in Colocation Data Centers
When you lease space in a colocation data center, you’re not just renting square footage. You’re also signing up for a set of promises, known as Service Level Agreements — or SLAs for short. These agreements spell out what your colocation provider is responsible for, including things like power availability, temperature control, and how they’ll respond if something goes wrong.
Many people think of SLAs mostly in terms of power. After all, if power goes out, everyone knows it right away — including your customers. But there’s another part of the SLA that’s just as important and often much harder to manage: temperature.
Thermal SLAs deal with the temperature of the air that cools your servers. If the temperature gets too high for too long, your equipment can run hotter than it should. Even if your systems don’t fail right away, running too warm for extended periods can shorten the life of your hardware and cause performance issues over time.
Why Thermal SLAs Are Harder to Manage
One reason temperature issues are harder to catch is that they don’t always cause an immediate failure. A hot spot might exist for weeks or months before anyone notices. And sometimes, your servers will sound the alarm before the data center’s own monitoring system does.
A lot of this depends on how and where the data center places its temperature sensors. If sensors aren’t positioned near your servers — for example, if they’re only measuring room temperature instead of what’s happening right at the equipment — it’s easy for small problems to go unnoticed until they turn into bigger ones.
That’s why many colocation customers decide to do their own monitoring, or at least double-check the provider’s data.
Key Terms You Need to Understand
Start by reviewing the specific terms of your SLA:
Where are the temperatures being measured? At the cold aisle? At the rack? Somewhere else?
What temperature counts as a problem? Is it 27°C? 29°C? And how long does it have to stay that warm to be a violation?
How often is the data being collected? Every minute? Every 15 minutes?
How long does the temperature have to be out of range before the provider agrees it’s a breach?
Relying on Colocation Data
Most colocation providers will give you some kind of data about temperature performance. Sometimes you’ll get periodic reports that show whether everything stayed within the SLA limits. Some providers will even give you live access to their monitoring systems.
But not every provider offers the same level of transparency. If you want full confidence — especially if you’re running critical systems — you may want to add your own monitoring.
Taking Control with In-House Monitoring
Many companies feel better when they can track their own temperature data. That way, you’re not completely dependent on the data center’s reports.
One simple approach is to install temperature sensors inside your racks. It’s a good idea to place sensors at the top, middle, and bottom of each rack, both in front (cold aisle side) and in back (hot aisle side). This gives you a much better picture of what’s happening at the equipment level.
You can then use your own software to collect and analyze the data. Some companies invest in DCIM (Data Center Infrastructure Management) tools, while others use simpler monitoring platforms. Either way, having your own data allows you to spot problems early — before they turn into expensive repairs.
Many companies also schedule regular audits of their space, either by having their staff walk the floor with portable monitors or hiring outside contractors to do independent checks.
What Happens When There’s a Breach?
Even with good monitoring, you need a clear plan for what to do if something goes wrong.
Train your team to understand the SLA terms so they know when a violation has occurred. If there’s an issue, make sure you document everything — including timestamps, sensor data, and any communications with the provider. This kind of evidence is critical if you need to escalate the problem and file a claim under your SLA.
The Value of Independent Audits
Sometimes your data may not match what the colocation provider is seeing on their end. In these situations, it can help to bring in a neutral third party to conduct an independent audit. These audits are non-intrusive, meaning they won’t disrupt your operations, but they provide a valuable second opinion and help settle any disputes.
How Purkay Labs Can Help
At Purkay Labs, we specialize in exactly this kind of monitoring. Our AUDIT-BUDDY System allows us to run two types of tests that give you clear, actionable data about your environment.
With our QuickScan, we take temperature measurements at multiple heights and both sides of each rack. This creates a snapshot that highlights any areas running too warm, based on your SLA limits.
For a deeper dive, our LongScan places sensors throughout the space to collect temperature data every minute over hours or days. This long-term monitoring shows how temperatures fluctuate over time, whether due to changes in IT load, cooling system behavior, or other factors. If any temperature breaches happen, we can pinpoint exactly when and how long they occurred.
Both services give you the data you need to protect your equipment, hold providers accountable, and make smarter decisions about your cooling strategy.
About Purkay Labs
Purkay Labs helps data center operators, facility managers, and engineers monitor rack-level temperature and humidity to validate SLA compliance, detect hot spots, and improve cooling efficiency. Our portable AUDIT-BUDDY System delivers real-time data that’s easy to collect and easy to act on — without disrupting your operations. We give you the clear, actionable insights you need to keep your data center running smoothly.