BMS data tells you what the system is doing. It doesn’t tell you how air is actually behaving. Most cooling issues—bypass, recirculation, uneven airflow—happen at the rack level, where BMS visibility is limited or nonexistent. Spot checks fill that gap. They show what sensors miss and confirm whether your cooling is working in practice, not just on paper.

Good airflow management is not about perfection. It’s about good control. In a well-functioning data center, cold air consistently reaches server inlets, hot air returns without mixing, and temperatures behave predictably across the room. This article explains what “good” actually looks like on the floor—and how to tell if your environment is working the way it should.

This guide is designed to help you understand how air actually moves through your facility. It focuses on the fundamentals—how cold air reaches servers, how hot air returns, and where that process breaks down in real environments. By the end, you should be able to spot common airflow issues like bypass and recirculation and understand why they matter before they show up as temperature problems.

Temperature sensors and BMS dashboards provide useful data, but they rarely show how cooling is actually performing across an entire data hall. This guide explains how operators verify cooling performance in live facilities using rack-level measurements, thermal surveys, airflow visualization, and resiliency testing. By understanding Delta-T patterns and airflow behavior, teams can uncover hidden hot spots, airflow imbalances, and cooling constraints before they impact uptime.

Cooling problems in data centers rarely start with alarms. They usually appear first as small warning signs—uneven rack temperatures, rising fan speeds, unexplained hot spots, or cooling units working harder than expected. This guide outlines ten common indicators that airflow or cooling performance may be limited, helping operators recognize hidden thermal issues before they impact uptime.

Data center cooling is often described as “keeping the room cold,” but the real goal is much simpler: move heat away from servers efficiently. This guide explains how airflow actually works inside a data center, how Delta-T reveals cooling performance, and why airflow distribution often matters more than cooling capacity. Understanding the path from supply air to server inlet, exhaust, and return gives operators the foundation needed to diagnose cooling problems before they impact uptime.

In 2025, Purkay Labs focused on making environmental data more practical and actionable for data center operators. From deeper Delta-T analysis to expanded monitoring beyond the white space, this year reinforced the importance of measuring the right spaces with the right data.

A bank’s UPS room faced random battery failures. Using Purkay Labs’ Dynamic Heat Maps, operators discovered hidden hotspots and fixed the problem for good.

This Halloween, Purkay Labs busts five cooling and airflow myths that still haunt data centers — and shows how to keep your facility truly chill.

Learn how AUDIT-BUDDY helps data centers test battery room performance during outages. Discover optimal temps, airflow risks, and monitoring strategies.

Air vs. liquid cooling isn’t an either/or. Most data centers still rely on air cooling, but shifting GPU loads make airflow management critical. Learn how Purkay Labs helps operators optimize cooling efficiency and prepare for the future.

Hot spots, airflow bottlenecks, and delta-T checks are useful—but they only tell part of the story. Learn how a full thermal survey gives operators the data they need to improve efficiency, reliability, and resilience.

f you’re thinking about adding or retrofitting cooling units, recent tariff increases could hit you in two ways—your budget and your timeline. Some replacements are unavoidable. If a system is at end-of-life or no longer supported, you have no choice. But if you’re upgrading because of higher rack densities or AI workloads, you could have more capacity than you think. Before you commit to new equipment, it’s worth checking what your current system can actually deliver.

Discover the four delta-Ts that define data center cooling efficiency and how measuring all of them can cut energy costs by up to 40%. Learn how Purkay Labs’ AUDIT-BUDDY delivers fast, rack-level thermal insights without permanent infrastructure.

At this year’s 7x24 Exchange in Orlando, one thing was clear: the data center industry is being pushed to its limits. Between 500kW racks, liquid cooling pilots, and BYOP (Bring Your Own Power) strategies, operators are navigating a rapidly evolving environment.

As data centers face increasing strain on utility grids, operators are exploring alternative power sources to meet the demands of high-density, AI-driven workloads. This post breaks down six on-site power solutions—from natural gas generators to solar and SMRs—evaluating each option’s cost, reliability, sustainability, and regulatory challenges. Whether you’re planning a new facility or rethinking resiliency, this guide offers a clear snapshot of what’s viable now—and what’s still emerging.

As high-density IT deployments increase, many legacy data centers are struggling to keep pace—not because of space or IT limitations, but due to cooling constraints. This article examines why simply adding more cooling equipment isn’t always viable, explores the common causes of stranded capacity, and outlines practical strategies to improve thermal efficiency and unlock headroom—without overhauling your infrastructure.

 With the rise of AI and the construction of high-wattage data centers, airflow management has become a critical concern—not just in the white space, but also in supporting infrastructure such as PDU rooms, UPS rooms, and battery rooms. This article highlights the importance of airflow management in these auxiliary spaces and outlines steps to take when overheating conditions arise.

As AI workloads surge, the power—and heat—inside every rack is growing fast. Here’s what that means for your facility, and how to get ahead of the cooling curve.

Dr. Jack is Back and this time he is de-mystifies delta-T.