TECHNICAL GUIDE

Why Specialist Data Center Cleaning Matters for Reliability

🗒 20 September 2026 •  ⏱ 8 min read

Dust inside a data centre deserves attention long before it becomes visible on a rack. Contamination can affect equipment, and cleaning itself introduces work around systems that may need to remain operational. For facility managers, this makes cleaning a maintenance activity that requires planning, clear boundaries and evidence of competent execution.

For organisations selecting data centre cleaning services in Malaysia, the useful question is: how will the contractor remove contamination while controlling the risks to the facility?

01 — How dust can affect data center equipment

ASHRAE’s 2009 contamination white paper describes mechanical, chemical and electrical effects from dust. Deposits can obstruct cooling airflow, while certain contaminants can contribute to corrosion or electrical bridging. Some dust absorbs moisture under particular humidity conditions, creating conditions that can reduce electrical insulation resistance. The risk depends on the contaminant and the environment; ordinary dust should not be described as automatically causing a short circuit. [ASHRAE: 2009 Particulate and Gaseous Contamination Guidelines for Data Centers, hosted by Dell].
 
A particle-related equipment fault is also different from a facility-wide outage. Whether a fault interrupts a service depends on the affected equipment and the resilience of the systems supporting it. A credible contamination-control programme should address a potential failure mechanism without claiming that every speck of dust will cause downtime.
 
Cleaning should therefore be judged against its agreed maintenance objectives. Claims that a cleaning visit reduced temperature, energy consumption or failures need relevant measurements; those outcomes should not be promised simply because surfaces look cleaner.

02 — what iso 14644-1 actually means

ISO 14644-1:2015 classifies air cleanliness by the concentration of airborne particles at specified particle sizes. It uses airborne particle measurements; it does not characterise the chemical or other nature of those particles. Its scope is air-cleanliness classification, rather than certification of a cleaning contractor or proof that a facility is free from every contamination hazard. [ISO: ISO 14644-1:2015].
 
The 2009 ASHRAE white paper specifies ISO Class 8 cleanliness for data centres. This is historical industry guidance, not evidence of a universal Malaysian legal requirement. Current equipment requirements and the facility specification should determine the applicable acceptance criteria. [ASHRAE contamination guidelines].
 
For procurement, avoid relying on the phrase “ISO cleaning” alone. Ask the contractor to identify the standard and edition, the target classification where applicable, the area covered and how the result will be assessed. If air classification is required, request a measurement report rather than treating before-and-after photographs as proof of compliance.

03 — why cleaning methods need to match the equipment

Cleaning a room, wiping an external cabinet and working inside a server are different scopes. They should not be treated as interchangeable permissions.

Dell’s enterprise-equipment cleaning guidance illustrates the distinction. For the cleaning and disinfection activities it describes, Dell limits work to external surfaces, warns against directly spraying liquids and says not to attempt to clean internal components. It also calls for extreme caution when external surfaces of operational equipment are cleaned. These instructions are product-specific guidance, not a universal procedure for every data center. [Dell: Guidance for Keeping Your Dell Technologies Equipment Clean].

Chemical selection also needs care. A blanket statement that all alcohol-based products are unsuitable would be misleading: Dell permits a specified isopropyl-alcohol concentration for certain external surfaces in that guidance. The appropriate decision depends on the equipment, surface, task and manufacturer’s instructions. [Dell equipment-cleaning guidance].
For a proposed cleaning job, require an approved equipment and materials list, explicit exclusions and a process for stopping work when conditions differ from the plan. Any internal equipment maintenance should have separate authorisation and an appropriate manufacturer-approved procedure.

04 — esd awareness belongs in the work plan

Electrostatic discharge, or ESD, is  another reason to assess how personnel and tools interact with sensitive electronics. The EOS/ESD Association describes control measures that address charge generation, grounding and neutralisation, alongside training and compliance checks. Its introductory guidance primarily concerns electronics manufacturing and assembly, it supports the underlying principles rather than providing a complete data center cleaning procedure. [EOS/ESD Association: ESD Fundamentals].

05 — a practical framework for planning the work

The following is a recommended procurement and planning framework, rather than a claim that every item is mandated by ISO 14644-1.

  • Assess : Areas requiring attention, observed contamination, equipment restrictions and any need for specialist investigation.
  • Define : Exact surfaces and spaces included, inaccessible areas, exclusion and acceptance criteria.
  • Authorize : Work timing, access permissions, supervision, equipment status and approved methods.
  • Control : Suitable tools and materials, protection of adjacent systems, communication and stop-work conditions.
  • Verify : Completion records, exceptions, agreed measurements and follow-up actions.

Where raised-floor access is proposed, make tile handling, access boundaries and coordination with facility operations explicit in the plan. Do not allow the cleaning scope to expand informally into cable handling, electrical work or internal equipment maintenance.

 

06 — how to assess a specialist cleaning contractor

Compare evidence of competence alongside price. Useful questions include:

  • What relevant training have the technicians assigned to this job completed?
  • Can the contractor provide an appropriate method statement and risk assessment?
  • How will the team follow equipment-manufacturer restrictionss?
  • Which tools and cleaning materials are proposed, and why are they suitable?
  • Who can authorize changes or stop the work?
  • What completion evidence and measurement reports will be provided?

If a vendor cites a certification, verify the issuing organization, exact qualification, scope and validity. Establish whether it applies to the company or to particular individuals, and whether those individuals will be assigned to the work. A credential should support the assessment of competence, it should not replace examination of the propose method.

07 — Set a cleaning schedule around the facility

A practical approach is to set inspection and cleaning intervals using site conditions, equipment requirements, previous findings and the activities taking place nearby. Review the plan after construction, equipment moves or an identified contamination event instead of assuming the original schedule remains adequate.

Keep records of what was inspected, cleaned, measure and left unresolved. Those records help the facility team decide whether to adjust the cleaning scope or investigate the source of recurring contamination.

For Malaysian data center owners and operators, specialist cleaning should be an accountable part of facility maintenance: a defined scope, competent personnel, controlled execution and documented results.