Airflow & Temperature: The Cheap Kilowatts
Containment, blanking plates and setpoints raised to what the servers actually allow: the fixes that cut cooling energy without touching resilience.
10 min read · Jacob Willis, Net Zero Lead · Last reviewed July 2026
The cheapest kilowatt-hours in a data centre are hiding in plain sight: in the gaps between racks where cold air leaks home unused, and in setpoints chosen when servers were fragile and electricity was cheap. Neither fix needs new plant. Airflow management is hardware-shop material (blanking plates, brushes, containment panels) and temperature is a number in the BMS, yet together they routinely cut a legacy facility's cooling energy by a third. This lesson works both, in the only order that works: fix the air first, then raise the temperatures the fixed air makes safe.