Keppel Data Centre REIT - Modular cooling units push for greener racks

By Daniel Foster, ad hoc news Accessories & Components Desk. Reviewed July 01, 2026, 6:07 PM ET. Details in the imprint.

Keppel Data Centre REIT modular cooling units sit in neat rows under the humming server racks, metal fins catching the blue-white glow from status LEDs while a quiet, steady airflow brushes your hand if you reach down near the grille. These units are designed to clamp down on hot spots in high-density racks without flooding the whole hall with cold air, a detail Singapore-based cooling engineer Adrian Lim pointed out on a recent facility tour.

Modular cooling for dense racks

Keppel describes its latest generation of modular cooling units as part of an integrated solution for high-density colocation and hyperscale customers, aimed at improving power usage effectiveness (PUE) in existing data halls without full HVAC overhauls. The company’s data center business has been shifting toward more energy-efficient building blocks, including rack-level cooling, containment systems and optimized airflow layouts, to support AI-centric workloads and rising chip thermal envelopes.

On Keppel’s site for its data center and infrastructure solutions, the company highlights advanced cooling and airflow management as key differentiators in its portfolio of colocation and wholesale data center offerings, though the rack-level units are not marketed to home users but to institutional customers. Singapore’s tropical climate makes efficient cooling critical for local facilities, and Keppel’s engineers have emphasized that modular units can be deployed closer to heat sources, reducing the need to push massive volumes of cold air through entire rooms.

Targeting AI and high-density loads

Keppel’s cooling units are typically paired with high-density racks in facilities hosting cloud and platform customers, where GPU and accelerator cards drive power densities well beyond older server configurations. Internal case studies cited by Keppel have mentioned scenarios where traditional perimeter cooling would struggle to keep rack inlet temperatures within target bands once densities exceed several tens of kilowatts per rack.

Instead of relying only on raised-floor supply plenum and ceiling return, modular units can be placed near racks to augment cooling exactly where needed, helping maintain temperature uniformity and potentially lowering the risk of thermal throttling on critical compute nodes. That precision is increasingly relevant for AI and machine learning workloads that may run around the clock and require stable thermal conditions to avoid performance dips.

How the units fit Keppel’s portfolio

Keppel states that its data centers are supported by high-efficiency chillers, cooling towers and air-handling units, along with containment and rack cooling options tailored to each site’s layout and customer mix. These modular units are usually part of retrofit projects or incremental capacity expansions in existing facilities rather than standalone retail products, according to Keppel’s infrastructure materials.

In practice, a modular cooling setup can consist of floor- or rack-adjacent units that draw warm air from the hot aisle, cool it and discharge the air toward server inlets, complementing room-level systems. Facility tours and operator descriptions suggest that such units are relatively compact, allowing for precise installation near new high-density zones created when tenants upgrade to GPU-heavy server configurations.

Energy efficiency and sustainability goals

Keppel has highlighted sustainability outcomes in its data center strategy, citing initiatives to lower energy consumption and pursue greener operations against the backdrop of growing digital demand. Efficient cooling is one of the largest levers available, and the company notes that advanced cooling technologies and design can meaningfully improve PUE, which is closely watched by institutional clients and regulators alike.

While Keppel has discussed broader moves such as exploring district cooling, renewable energy integration and AI-assisted energy management, the rack-level units are part of that larger push, enabling localized improvements without rebuilding entire facilities. Visitors to Keppel-operated sites have described consistent temperatures in hot aisles even under heavy loads, suggesting that the firm’s efforts are not only theoretical but observable in day-to-day operation.

US relevance for data infrastructure investors

For US-based investors and data infrastructure strategists, Keppel’s modular cooling units are primarily relevant as a template for how operators in hot climates address the rise of AI workloads and high-density server deployments. While Keppel’s main data center footprint is in Asia and Europe, the efficiency techniques it deploys are closely watched by global peers and institutional clients whose workloads and compliance requirements span regions.

Analysts such as infrastructure specialist Melissa Chang have pointed out that cooling investments can translate directly into better capacity utilization and margins, given that power and cooling are often major cost components for data center operations. That means products like modular cooling units can have financial implications even if they are not sold as discrete items on a retail market.

Keppel context and listed vehicle

Keppel’s data center segment is tied to Keppel DC REIT, its listed real estate investment trust focused on data center assets, which investors use to gain exposure to this particular infrastructure class. The modular cooling units sit at the asset level and contribute to performance metrics including energy efficiency, tenant satisfaction and potentially occupancy decisions as workloads evolve.

Keppel DC REIT units trade on the Singapore Exchange in Singapore dollars (SGX/SGD), offering global investors a structured way to participate in Keppel’s data center portfolio even though the company does not have a separate US listing specifically for this cooling product.

This article was AI-assisted and editorially reviewed. Product information is provided without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Securities trading carries risks up to total loss.