CLEAN INSIGHTS / Prevention
Data center cooling: why clean air paths matter
Based on LinkedIn posts published on and .
Dust on filters, heat exchangers and IT components can impair airflow and heat removal. Temperature investigations therefore need to consider the entire cooling chain.
Follow the path from cooling unit to component
Rising equipment temperatures do not necessarily mean insufficient cooling capacity. Between the cooling unit and the component are air paths, inlets, filters, fans and heat sinks. Deposits can affect several points along that route. Assessment therefore considers both the rack environment and the affected equipment.
Check filters and heat exchangers
Dirty filters increase airflow resistance. Depending on the control system, airflow may fall or additional fan power may be required. Heat-exchanger deposits can also impair air passage and heat transfer. Filters, heat exchangers and air paths in CRAH and CRAC areas are therefore considered together. Our technical cleaning service includes cooling equipment and its surroundings.
Air must also reach the components inside a server
Equipment inlets, fans and heat sinks can develop further restrictions. Individual components may experience impaired heat removal even at a suitable room temperature. Higher fan speeds or temperature warnings are reasons to investigate these areas alongside the cooling system. Device interior cleaning reaches deposits that room cleaning alone cannot remove.
Consider air distribution alongside cleaning
Raised floors, air outlets and hot- or cold-aisle containment influence how air reaches the racks. Cleaning takes account of intended floor-panel positions and air paths. After alterations, check for new deposits and changed airflow routes. Environmental monitoring complements the assessment with deliberately selected measurement locations.
Assess energy efficiency using operating data
Clean air paths support the intended thermal operating conditions. A dirty filter alone cannot establish a specific energy saving for a whole data center. Comparisons before and after cleaning need to account for factors such as IT load, setpoints and operating state. Comparable measurements provide a stronger basis than blanket savings claims.
FOR YOUR PLANNING
Your checklist at a glance
- Have filters, heat exchangers and air paths been checked together?
- Are equipment inlets, fans and heat sinks included?
- Are raised floors and aisle containment considered?
- Are comparison data recorded under similar load and operation?