Protecting equipment, cooling performance and uptime
Data centre contamination control combines prevention, specialist cleaning, testing and ongoing review. It addresses how contaminants enter the facility, where they accumulate and how maintenance or construction work can spread them.
Dust and debris can obstruct equipment airflow, accumulate on cooling components and contribute to contamination-related failures. A planned approach helps reduce these risks and maintain the environmental conditions specified for installed equipment.
Where does data centre contamination come from?
Contamination can originate both inside and outside a data hall. Common sources include:
- Dust carried in on footwear, clothing, tools and packaging.
- Incoming servers, racks and other equipment containing existing dust deposits.
- Construction and refurbishment activities, including drilling and cutting.
- Damaged or exposed insulation releasing particles.
- Wear debris from mechanical equipment, including drive belts where fitted.
- Contaminants entering through ventilation systems or gaps in the building fabric.
- Debris left in raised floor voids following installation or maintenance work.
Identifying and controlling the source is essential. Cleaning alone cannot prevent recurring contamination if the material continues to enter or be released into the environment.
Prevent contamination at the point of entry
Access procedures should address people, equipment and materials entering controlled areas. Practical measures include removing unnecessary packaging outside the data hall, checking tools and equipment for cleanliness and keeping access routes clean.
Appropriately selected contamination-control flooring, including Dycem systems, can help reduce particles carried across entrances on footwear and wheels. These measures should form part of a wider cleaning and maintenance programme.
Equipment arriving from another facility may carry contamination into an otherwise clean environment. Our IT equipment migration contamination control service addresses cleaning requirements before equipment is installed at its destination.
Control dust during construction and maintenance
Drilling, cutting, cable installation and refurbishment can release dust close to operational equipment. Before work begins, facilities teams should agree suitable segregation, dust capture, protection and cleaning arrangements.
- Assess the work location and its relationship to cooling airflow and live equipment.
- Use suitable local dust extraction and containment.
- Protect exposed equipment and prevent contaminated air reaching equipment intakes.
- Remove waste and debris through agreed routes.
- Inspect and clean affected areas before returning them to normal operation.
Where appropriate, IT Cleaning Ltd can provide ProtectIT™ equipment protection as part of an agreed contamination-control plan.
Remove settled contamination through technical cleaning
A technical cleaning programme should cover the agreed accessible surfaces and areas where contamination accumulates. Depending on the site and scope, this may include raised floor voids, floor surfaces, rack exteriors, overhead services and accessible room surfaces.
HEPA-filtered vacuuming and controlled wiping methods help remove contamination while limiting its redistribution. Work around operational equipment requires suitable methods, site coordination and clearly defined access restrictions.
Internal equipment cleaning is a separate activity requiring an agreed scope, appropriate isolation or shutdown arrangements where necessary, and consideration of manufacturer instructions.
Read more about our data centre and server room cleaning services.
Airborne cleanliness and ISO 14644-1 Class 8
ISO 14644-1 classifies air cleanliness by airborne particle concentration. Class 8 is specified in environmental requirements for certain IT equipment and is a relevant benchmark where required by the equipment manufacturer or the agreed site specification.
Airborne classification and surface cleanliness are separate requirements. A particle-counting survey does not establish that all accessible surfaces are free from settled dust. Equally, a room that looks clean has not necessarily demonstrated the required airborne classification.
IT Cleaning Ltd can provide technical cleaning with an agreed requirement for accessible surfaces to be free from settled dust, followed by airborne particle testing to assess ISO 14644-1 Class 8 classification.
The survey report should record the sampling locations, relevant particle sizes, occupancy state, results and any limitations. Results describe the conditions measured during the survey; ongoing control requires suitable maintenance and monitoring.
Check the requirements for installed equipment
Some equipment manufacturers specify both airborne particle limits and gaseous contamination limits. For example, NVIDIA’s DGX SuperPOD design guidance includes ISO 14644-1 Class 8 requirements for the rack environment under the conditions described in that guidance.
Operators should check the documentation for their particular equipment. Requirements can vary between products and installations, and should not be treated as a universal certification requirement for every data centre.
Airborne particle testing does not assess corrosive gases or identify the chemical composition of dust. Where these are suspected, additional specialist assessment may be required.
Investigate recurring contamination
Repeated dust deposits, deteriorating insulation or unexpected increases in airborne particle concentrations warrant investigation. Visual inspection and particle counting can help assess the problem, while laboratory analysis may be needed to identify a deposited material.
Our article on phenolic foam contamination in data centres explains the distinction between insulation dust and potential corrosion beneath wet insulation.
How often should a data centre be cleaned?
Cleaning frequency should reflect the site’s contamination risks, equipment requirements, condition and previous survey results. Construction work, frequent equipment movements or recurring dust sources may justify additional inspections and cleaning.
A maintenance schedule should be reviewed when site conditions change. The aim is to prevent avoidable build-up and address contamination before it affects equipment or creates a larger remediation task.
A documented approach to contamination control
IT Cleaning Ltd’s approach follows a clear sequence:
- Site assessment: Review the environment, accessible areas and operational constraints.
- Technical cleaning: Remove contamination within the agreed scope.
- Testing: Measure airborne particle concentrations where specified.
- Validation: Assess results against the agreed acceptance criteria.
- Detailed report: Record the work, findings, results and limitations.
- Ongoing recommendations: Identify maintenance needs and opportunities to reduce recurring contamination.
This provides facilities teams with a record of the work completed and evidence to support future maintenance decisions.
Discuss your data centre contamination-control requirements
IT Cleaning Ltd provides specialist technical cleaning and airborne particle testing for data centres, data halls, server rooms and comms rooms across the UK.
Contact IT Cleaning Ltd to discuss your environment and arrange a quotation for an agreed assessment, cleaning and testing scope.