For decades, data center rack densities sat comfortably at around 40kW per rack, making air cooling within controlled environments relatively straightforward, predictable, and manageable. But now firmly inside the AI era, this sense of equilibrium is rapidly eroding as operators confront a new set of challenges defined by extreme density, accelerated thermal loads, and constant pressure to protect uptime.
Today’s massive rack densities mean the most efficient – and increasingly the only viable cooling method – is liquid cooling. Introducing liquid into the data center represents a fundamental shift away from traditional, well-established approaches towards something far more dynamic, complex and, in many ways, less forgiving.
Where a single aisle may have once required around 200kW of cooling, operators are now dealing with aisle densities exceeding 1MW, with entire halls transitioning to liquid-cooled setups. This new normal represents a full-scale infrastructural evolution to deliver liquid consistently across every rack throughout the facility without interruption.
Central to this evolution are the material choices that underpin the durability and performance of the entire cooling system. As facilities become increasingly critical to the digital landscape – representing vast capital investments – protecting equipment from liquid-related risks and maintaining always-on operations must come built into each and every design and planning decision.
