How do you verify air flow in a raised-floor data center to prevent hotspots?

• A. Use simple airflow indicators without temperature data.
• B. Rely on intuition to gauge airflow.
• C. Measure ambient room temperature only.
• D. Use anemometers and thermal imaging, measure supply/return temps, verify balanced airflow, and adjust dampers or containment as needed.

Answer: (D)

Verifying airflow in a raised-floor data center is about obtaining real, spatially distributed data on how air moves and what temperatures the equipment actually sees. Using only simple indicators or relying on intuition won’t reveal where air is misdirected or where hotspots form. The strongest approach combines several measurements: use anemometers to quantify air velocity at supply tiles, and employ thermal imaging to visualize temperature distribution across racks and aisles. Measure supply temperatures and return/or exhaust temperatures to confirm the correct temperature differential and ensure air is cooling where it’s needed. Check that airflow is balanced across the underfloor plenum so no area is under- or over-pressurized. When data show imbalances or hotspots, adjust dampers to tune flow and consider containment strategies (like cold-aisle or hot-aisle containment) to prevent air mixing and improve cooling predictability. This data-driven method provides clear insight and actionable steps to prevent hotspots and keep temperatures even across the server population.