We provide specialized, non-invasive cleaning for critical environments where "standard" cleaning isn't enough. Our protocol is designed to eliminate dust-related hardware failures and maintain peak cooling efficiency.
Sub-Floor Decontamination
Safe access and vacuuming of the plenum using industrial suction lifters and HEPA filtration.
HEPA-Filtered Mitigation
Capture of 99.97% of microscopic particulates to protect server intakes.
Anti-Static (ESD) Safety
Use of non-conductive agents and specialized equipment to prevent static discharge.
"No-Touch" Policy
Strict technical SOPs ensuring staff never interfere with cabling or hardware.
Vetted Reliability
All personnel are SAPS-cleared and trained in EPO (Emergency Power Off) awareness.
Services are customised following a site assessment.
What You need to know
Industry best practices recommend a comprehensive deep clean — covering sub-floor plenums, raised floors, and equipment surfaces — at least twice a year as an absolute minimum. High-density environments housing AI or GPU infrastructure should be cleaned quarterly, and some mission-critical facilities require monthly specialist cleaning. In Johannesburg specifically, the Highveld’s elevated ambient particulate levels — among the highest in Africa, with mean PM2.5 concentrations more than three times the WHO daily guideline — mean that dust infiltrates facilities at a significantly higher rate than comparable international data centres. Quarterly professional cleaning is strongly recommended for all Johannesburg data centres.
Standard commercial cleaning prioritises visual appearance. It uses high-moisture mopping, unfiltered vacuum cleaners, and general-purpose chemicals — all of which introduce serious risks inside a data centre. Unfiltered vacuums exhaust fine dust back into the air, where cooling fans immediately draw it into server intakes. High-moisture mopping near electrical equipment can trigger leak detection alarms and cause short circuits. Standard cleaning staff receive no training in ESD safety, airflow management, cable awareness, or EPO protocols.
Data centre cleaning is a technical discipline. It requires HEPA-filtered equipment, ESD-safe agents, interference-suppressed orbital machines, and a strict no-touch policy for all hardware and cabling. In South Africa, there is an additional contamination source unique to this market: diesel generator soot from frequent loadshedding-related generator runs. Diesel particulate is ultra-fine, conductive, and corrosive — and requires specialist HEPA-filtered removal, not standard cleaning methods.
ESD stands for Electrostatic Discharge — the sudden flow of electricity between two objects with different electrical charges. Inside a data centre, even a minor static event that is unnoticeable to a human can silently and permanently destroy a server component worth tens of thousands of rands. ESD damage is particularly dangerous because it is often invisible at the time of occurrence — a component may continue to function for days or weeks before failing, making the cause extremely difficult to trace.
ESD-safe cleaning uses specially grounded equipment, anti-static cleaning agents, and static-dissipative materials throughout the entire cleaning process. Technicians wear grounding straps and all tools are certified to prevent the build-up or transfer of static charges. Johannesburg’s dry Highveld climate — with characteristically low relative humidity — increases the rate of static electricity generation compared to more humid environments, making ESD-safe protocols especially critical for Gauteng data centres.
A human hair is approximately 70 microns in diameter. The particles that cause the most damage to data centre hardware — fine concrete dust, metallic shavings, diesel soot, and biological contaminants — are often smaller than 1 micron and completely invisible to the naked eye. They pass straight through a standard vacuum filter and are redistributed into the air, where cooling fans draw them directly into server intakes.
HEPA (High-Efficiency Particulate Air) filters are certified to capture 99.97% of all particles at 0.3 microns in size — the most penetrating particle size, at which filters are least efficient. Particles both larger and smaller than 0.3 microns are captured at even higher rates. This is the benchmark established in the ASHRAE Handbook and referenced in the facility documentation of major hardware OEMs including NVIDIA, Oracle, and Cisco — all of whom have deployed infrastructure in South Africa. When Tergeo uses HEPA-filtered vacuums, those particles are permanently removed from your environment. When a standard vacuum is used, they are simply redistributed.
The sub-floor plenum — the cavity beneath a raised data centre floor — is the primary delivery system for cold air to your equipment. Because of gravity, it is also the area most prone to contamination. Concrete dust, metallic shavings from cable work, and general debris all settle here over time.
When the plenum is neglected, the high-velocity airflow from CRAC units sweeps accumulated contaminants upward through perforated floor tiles directly into server intakes. The consequences are severe: clogged circuitry, restricted airflow, increased thermal load, accelerated hardware degradation, and a significantly elevated risk of accidental fire suppressant discharge triggered by overheating sensors. A contaminated plenum also forces cooling systems to work harder, increasing energy consumption and utility costs.
Johannesburg is currently experiencing one of Africa’s largest data centre construction booms — with multiple simultaneous hyperscale builds underway in the Bredell, Midrand, and Isando corridors. Facilities in these areas face elevated sub-floor contamination from nearby construction activity and should schedule post-construction deep cleans and increase their regular cleaning frequency accordingly.
Yes — and this is precisely what separates a specialist data centre cleaning company from a general cleaning contractor. Tergeo’s entire protocol is designed for live, mission-critical environments that cannot be shut down.
Our technicians use interference-suppressed orbital machines that do not generate electromagnetic interference. All equipment is powered only from designated utility circuits — never from critical PDU or UPS power sources. A strict no-touch policy governs all cabling and hardware: our staff clean around and between equipment without ever touching, moving, or adjusting any component. Floor tiles are lifted one at a time using industrial suction lifters, ensuring that cold air pathways are never fully interrupted.
In South Africa’s loadshedding environment, where data centres already face elevated downtime risk from grid instability, the ability to clean without any equipment shutdown is not a luxury — it is a non-negotiable operational requirement. Tergeo delivers a thoroughly cleaned facility with zero disruption to your operations.
The mechanism is called thermal clogging. Dust and airborne particles accumulate on heat sinks, fan bearings, and ventilation grilles, forming a thermal blanket that traps heat against components. As temperatures rise, cooling fans spin faster to compensate — drawing in more dust, which accelerates the clogging. This cycle of resistive heating progressively degrades components and shortens their operational lifespan.
For high-density GPU infrastructure — which runs at significantly higher thermal loads than traditional servers — this process is dramatically accelerated. Google launched its first Johannesburg cloud region in 2024, Microsoft committed USD 300 million to South African cloud and AI infrastructure by 2027, and Teraco’s JB4 expansion was specifically designed for high-density AI racks. A single enterprise GPU can cost upwards of R500,000. Particulate-related thermal degradation that shortens its lifespan by even 20% represents a material financial loss that far exceeds the cost of a professional quarterly cleaning programme.
Beyond thermal effects, conductive particles such as metallic shavings and diesel soot can bridge electrical contacts and cause short circuits. Corrosive gaseous contaminants can attack copper and silver contacts at a molecular level, causing failures that are invisible until the component stops working entirely.
The Emergency Power Off (EPO) system is a safety mechanism required by building codes at data centre exit doors. When activated, it instantly cuts all electrical power to the entire data centre — servers, cooling, lighting, everything. It exists to protect personnel and infrastructure in the event of a fire or critical emergency.
Accidental EPO activation by untrained personnel is one of the most well-documented causes of self-inflicted, catastrophic data centre downtime. A mop handle, a vacuum cord, a cleaning trolley — any of these can accidentally trigger an EPO button if a cleaner is not specifically aware of its location and the consequences of contact.
All Tergeo specialists are trained to identify EPO buttons on every site before beginning work, maintain strict spatial awareness throughout the cleaning process, and follow documented access protocols that prevent accidental activation. This training is non-negotiable and forms part of every Tergeo technician’s site induction.
The primary international standard is ISO 14644-1, which defines cleanliness classes by particle concentration per cubic metre of air. Data centres are typically required to meet ISO Class 8, which permits a maximum of 3,520,000 particles of 0.5 microns or larger per cubic metre. Major hardware manufacturers including NVIDIA, Oracle, and Cisco now reference ISO 14644-1 Class 8 compliance in their facility usage documentation. ASHRAE Technical Committee 9.9 provides complementary guidelines on acceptable particulate and gaseous contamination levels for IT equipment environments.
Tergeo’s protocols are aligned with both ISO 14644-1 Class 8 and ASHRAE TC 9.9 guidelines. In South Africa, data centre cleaning contractors must also comply with the Occupational Health and Safety Act (85 of 1993), which requires documented risk assessments, appropriate equipment, and trained personnel for all work in specialised environments. Tergeo operates in full compliance with the OHS Act and provides documented risk assessments and method statements upon request.
Yes. Every Tergeo technician deployed to a data centre undergoes a rigorous SAPS (South African Police Service) criminal background check before their first deployment. This is non-negotiable.
Data centres are high-security environments housing the servers, storage systems, and network infrastructure that underpin your organisation’s most sensitive operations — financial data, client records, intellectual property, and regulated information. Allowing unvetted individuals unsupervised access to this environment is a security and compliance risk that no responsible organisation should accept.
In addition to SAPS clearance, all Tergeo data centre staff are trained in EPO awareness, site-specific access control protocols, and confidentiality requirements. We do not use casual labour, labour brokers, or unvetted subcontractors in mission-critical facilities. The same vetted team is assigned to your site consistently, so you always know exactly who is in your facility.
South Africa’s history of loadshedding has had a direct and underappreciated impact on data centre cleanliness. Every time a diesel generator starts up, it produces ultra-fine soot particles — primarily PM2.5 and sub-micron PM0.1 — that enter facilities through air handling systems. South African data centres that ran generators frequently during Stages 4 to 6 loadshedding accumulated diesel particulate contamination at rates far higher than facilities in countries with stable grid power.
Diesel soot is particularly hazardous in a data centre environment because it is both conductive and corrosive. It settles on server contacts, heat sinks, and raised floor surfaces, accelerating hardware degradation in ways that are invisible until a component fails. Facilities that experienced heavy generator use during the 2022 to 2024 loadshedding period should treat a professional deep clean as a priority maintenance action, regardless of whether regular cleaning has been performed. Standard cleaning methods cannot adequately address diesel particulate contamination — HEPA-filtered specialist cleaning is required.
Yes. The Occupational Health and Safety Act (85 of 1993) applies to all work performed in South African workplaces, including cleaning contractors working inside data centres. The OHS Act requires that cleaning contractors conduct documented risk assessments before entering the data centre environment, use appropriate personal protective equipment, operate equipment that does not create hazards for other workers or for sensitive equipment in the facility, and employ trained personnel for specialised environments.
Engaging a cleaning company that cannot provide a documented risk assessment and method statement for data centre work is not only an operational risk — it is a potential OHS Act compliance failure for the data centre operator who permitted the work. Tergeo provides full OHS Act-compliant documentation for every data centre engagement, including site-specific risk assessments, method statements, and proof of personnel training.
Yes, in a direct and important way. South Africa’s Protection of Personal Information Act (POPIA) requires organisations to implement appropriate technical and organisational measures to protect personal information — including the physical security of the infrastructure that stores or processes it.
Allowing unvetted cleaning staff unsupervised access to a data centre that processes personal information creates a physical security risk that could constitute a POPIA compliance failure. If a data breach were to occur and it was found that unvetted third parties had unrestricted physical access to the facility, the responsible party could face regulatory scrutiny from the Information Regulator.
Using a specialist cleaning company with SAPS-cleared personnel, documented access protocols, signed confidentiality agreements, and consistent team assignment is a practical and demonstrable step toward meeting POPIA’s physical security obligations. Tergeo provides all of these as standard on every data centre contract.