AI reshapes fire protection design for data centres

Fire protection is moving earlier in the design process for European data centres as operators adapt facilities for AI workloads, according to data centre fire safety supplier VID Firekill.

The company said higher rack densities and more varied thermal profiles have altered the risk picture inside data halls. It also pointed to new mechanical and electrical interfaces created by liquid cooling as another factor that changes how safety systems fit into a site plan.

Demand for new capacity continues to rise across Europe, led by large cloud operators such as Microsoft, AWS, Oracle, Google and Alibaba. VID Firekill said the bigger shift sits in design assumptions rather than build volume alone. It described "AI-ready" sites as a different operating environment from traditional facilities built around more uniform loads.

Higher densities

VID Firekill said data centre halls once planned around predictable power densities now face much sharper variation, with high-density compute concentrated in zones. It cited rack densities of 20 kW to 40 kW becoming more common in AI deployments.

The company said this pattern creates localised thermal stress and increases the potential fire load in specific parts of a hall. It also said it reduces tolerance for failure in cooling and electrical systems.

Design teams increasingly plan around peak scenarios rather than averages, according to the company. It said this approach affects electrical architecture, cooling design and safety systems selection.

Liquid cooling

Liquid cooling has expanded from specialist use into more mainstream deployment in AI environments, VID Firekill said. It listed rear-door heat exchangers, direct-to-chip cooling and immersion technologies among the approaches now appearing more frequently.

The company said these systems change the overall risk profile inside IT spaces. It pointed to liquids present within IT areas, added pipework and interfaces, and the interaction between electrical, mechanical and cooling systems. It also cited different ceiling heights as part of the physical changes that influence safety design.

VID Firekill said fire protection strategies need to reflect these hybrid environments. It said designers now assess ignition risks and escalation pathways that sit across multiple systems.

Specialised spaces

VID Firekill said modern facilities operate as collections of specialist rooms and zones rather than a single uniform hall. It listed data halls, UPS and battery rooms, medium- and low-voltage electrical rooms, generator halls, cooling plants, and storage and loading bays as areas with distinct hazards and operational constraints.

The company said this segmentation has increased pressure for site-specific fire protection approaches. It also said local requirements can vary, and it cited differences in how authorities interpret rules and expectations. It also referenced the presence of lithium-ion batteries, contaminated fire water treatment obligations, available electrical power and recovery time objectives, and land and plot constraints.

VID Firekill said these factors reduce the viability of applying a single standard approach across an entire site. It said protection strategies now align more closely with the function of each area and with plans for scale-out expansion.

Continuity focus

VID Firekill said the industry focus has shifted from compliance as a primary driver to business continuity. It said operators and investors now weigh how quickly systems can be restored after an incident and what level of collateral damage a site can accept.

The company also highlighted operational concerns around clean-up time and equipment replacement cycles. It said the evaluation of fire protection now includes its impact on uptime and recovery rather than suppression performance alone.

Earlier decisions

VID Firekill said fire protection now appears earlier in concept and detailed design. It said this work increasingly takes place alongside electrical and mechanical engineering, zoning and compartmentation planning, and cooling strategy decisions. It also referenced integration with modular containerised generator sets and EPODs, and said sustainability objectives sit alongside these discussions.

It said this change reflects an industry move away from treating fire protection as a late-stage add-on. The company described the result as systems that fit the operational reality of AI-focused sites.

ESG pressure

VID Firekill said large cloud operators face scrutiny over energy and water use and wider environmental impact. It said fire protection contributes to this debate through water consumption, energy use, chemical agents and waste associated with recovery after an incident.

The company said safety, resilience and sustainability now link more closely in design decisions than in past generations of facilities.

Riccardo Cerati, Global Business Development Director at VID Firekill, discussed the shift in design priorities for operators building AI-ready environments.

"AI-driven workloads are changing not only how data centers are operated, but how they must be designed at a system level. Fire protection is no longer just about compliance - it is becoming a design decision directly linked to resilience, recovery and operational continuity," said Cerati.

VID Firekill said the next wave of data centre development will put more emphasis on disruption tolerance and recovery speed as operators expand AI infrastructure across Europe.