For years, airflow management in data centers was pretty straightforward: get cold air where it needs to go, keep hot and cold air from mixing, and use aisle containment methods to help the cooling system work more efficiently.

 

Of course that’s still true, but the data hall environment is changing fast, as liquid cooling is specified into more builds to combat higher densities. More facilities are also dealing with a mix of air-cooled and liquid-cooled equipment in the same space, which is changing the role of airflow management in next-gen data centers.

There is a tendency to think that once liquid cooling enters the conversation, airflow management such as aisle containment is not as large of a concern.

In reality, most data centers are not flipping from one cooling method to another overnight. Some data center facilities will operate in hybrid environments, with traditional air-cooled equipment sitting alongside higher-density liquid-cooled systems.

 

Even when liquid cooling removes a large portion of the heat at the rack, there is still heat being released into the room from networking equipment, storage, power systems, and other infrastructure. There is still an air-side load to manage.

As rack densities increase, airflow issues become much more prevalent. Bypass air, hot and cold air mixing, recirculation, and uneven distribution can all create problems when cooling demand is already high. That is why aisle containment still matters.

 

In a next-generation data center, aisle containment is not just about separating hot and cold aisles; it becomes part of a broader thermal strategy that helps control the remaining air-cooled load and makes better use of the cooling infrastructure already in place.

We predict that many next-generation data centers will not be purely air-cooled or purely liquid-cooled. They will be both.

In one data hall, you may have traditional racks, direct-to-chip cooling, coolant distribution units, rear-door heat exchangers, and supporting power and mechanical systems all operating in the same environment. This means you need to consider airflow management early, alongside the rest of the data center design, but what about existing data centers?

New data center builds benefit from the flexibility that existing data centers typically do not have. Many existing data center facilities were designed around different rack densities and cooling assumptions than what operators face today. That means many teams are trying to support higher-density equipment without rebuilding the entire data hall.

 

Aisle containment, rear-door heat exchangers, and liquid cooling can all help existing facilities adapt. The answer will not look the same in every data hall, and it should be customized to that specific setup.

Data center cooling strategies may change, rack densities may change, and the mix of equipment may change, but the heat still has to go somewhere.

For some data centers, aisle containment will continue to do most of the work. For others, it will sit alongside liquid cooling and other high-density cooling strategies. In many cases, the solution will be a combination of both. Liquid cooling does not replace aisle containment, and in many hybrid data centers, the two work together.

Planning for higher densities or a changing cooling strategy?

 

Let’s talk about how aisle containment and airflow management fit into your next build.