# Data Center Cleaning in Saudi Arabia > Learn how to meet ASHRAE cleanliness standards in Saudi data centers by managing desert dust and coastal humidity. Protect your equipment and prevent failures today. - Author: Ashraf Almuhtaseb (Data Center Cleaning Specialist) - Published: 2026-10-19 - Updated: 2026-10-19 - URL: https://idata.center/en/articles/data-center-cleaning-saudi-arabia ## Key takeaways - ASHRAE TC 9.9 requires data centers to be maintained at ISO 14644-1 Class 8 cleanliness. - Relative humidity must be kept below 60% to prevent settled dust from becoming conductive. - Data center cleaning must follow a top-down method, finishing with the underfloor plenum. - Air entering the data center requires continuous filtration with MERV 11, preferably MERV 13. ## Data Center Cleaning in Saudi Arabia: Dust, Heat and Humidity Data center cleaning in Saudi Arabia has to be planned around fine desert dust, summer heat and coastal humidity. The target is the same as anywhere else: [ASHRAE TC 9.9](https://www.ashrae.org/File%20Library/Technical%20Resources/Publication%20Errata%20and%20Updates/2011-Gaseous-and-Particulate-Guidelines.pdf) says data centers must be kept clean to [ISO 14644-1](https://www.iso.org/standard/53394.html) Class 8, which allows no more than 3,520,000 particles of 0.5 µm and larger per cubic metre of air. Holding that line in Riyadh or Dammam simply takes more work than in a mild, wet climate. ## Why do Saudi data centers get dirty faster? ### Fine desert dust and storm days The Arabian Peninsula is one of the world's hotspots for extreme dust events. A [KAUST satellite study](https://pse.kaust.edu.sa/news/2021/03/07/a-fine-grained-view-of-dust-storms) covering 2003 to 2017 found storms occur all year, with peaks in March and August. ASHRAE notes that coarse mineral dust can stay airborne for days, and fine particles for much longer. That dust does not stay outside. It rides in through door gaps, cable penetrations and fresh-air intakes. Treat the [National Center for Meteorology](https://ncm.gov.sa) dust alerts as a work trigger. The day an alert is issued for your city, check door seals, room pressure and intake filters. The days after are for inspection. ### Coastal salt and humidity in Jeddah and Dammam Coastal sites carry a second risk. According to ASHRAE, sea salt can travel 10 km or more inland on strong winds, and salt-laden dust is the type that harms electronics. Settled dust absorbs moisture, and once room humidity passes the dust's deliquescent point it becomes wet and conductive. ASHRAE's general rule is to keep relative humidity below 60%. ### Construction and fit-out around live halls New halls are being built next to running ones across the Kingdom. Cutting, [drilling](https://idata.center/en/articles/drilling-inside-data-centers-dust-control) and unpacking all release dust. ASHRAE advises unboxing new equipment outside the data center, because fibres from cardboard and paper foul heat sinks. ## The same conditions across the GCC Kuwait, Bahrain, Qatar, the UAE and Oman share the same desert dust and Arabian Gulf coastline. A [32-year study of dust records](https://espace.inrs.ca/id/eprint/8487/1/P3502.pdf) at Abu Dhabi, Dubai, Sharjah and Ras Al Khaimah, covering 1983 to 2014, found that dust storms there last about 5 to 11 hours. They are driven by the north-westerly Shamal wind, which blows over the region throughout the year. Coastal sites in Kuwait City, Manama, Doha, Abu Dhabi, Dubai and Muscat face the same mix of dust and sea salt, so everything in this article applies there. Use your national weather service's dust alerts in place of NCM's. ## What standard should a Saudi data center be cleaned to? The ASHRAE TC 9.9 2011 guidelines, written by the IT manufacturer members of the committee, set these limits: | Parameter | ASHRAE TC 9.9 recommendation | | --- | --- | | Airborne particles | ISO 14644-1 Class 8: max 3,520,000 per m³ at ≥0.5 µm, 832,000 at ≥1 µm, 29,300 at ≥5 µm | | Room air (recirculation) | Continuous filtration with MERV 8 | | Air entering the data center | MERV 11, preferably MERV 13 | | Relative humidity | Below 60% | | Deliquescent RH of settled dust | Above 60% | | Copper corrosion rate | Below 300 Å/month (ISA-71.04 level G1) | | Silver corrosion rate | Below 200 Å/month | | Zinc whiskers | None present | A particle count only describes the air on the test day. It says nothing about dust already sitting on rack tops or in the plenum, and nothing about corrosive gases. Gases are measured with copper and silver coupons exposed for 30 days, then analysed in a lab. Server makers build these limits into their own requirements, as covered in [what Dell, HPE and Lenovo say about contaminated environments](https://idata.center/en/articles/server-manufacturers-dell-hpe-lenovo-say). ## How should you plan cleaning around local conditions? 1. Seal before you clean: door sweeps, cable penetrations and room pressure, so dust is not drawn straight back in. 2. Inspect intake filters after every dust alert. ASHRAE treats filter replacement frequency as one of the plainest measures of dust load. 3. Clean from the top down: overhead cable trays and ceiling surfaces, then rack exteriors and work surfaces, then the floor, then the underfloor plenum. 4. Keep cardboard, packaging and unboxing outside the white space. 5. Retest. Run a particle count to ISO 14644-1 and, at coastal or industrial sites, place copper and silver coupons for 30 days. ## Which areas are most often missed? ### The underfloor plenum The plenum is the supply duct for every perforated tile. Dust settled there is blown straight to server inlets, so it needs the same care as the room above. See the [raised floor tile cleaning guidelines](https://idata.center/en/articles/raised-floor-tile-cleaning-guidelines-cautions-and-best-practices-514) before lifting tiles. ### Zinc whiskers Some steel floor tiles and pedestals carry electroplated zinc, which can grow conductive whiskers 1 to 2 mm long. ASHRAE describes a simple check: stand a lifted tile on its edge in dim light and shine a torch across its underside at 45°. Twinkling specks are a warning sign, confirmed by lab analysis under a scanning electron microscope. ### Humidifiers Humidifiers that spray water droplets can add salty dust to the room. ASHRAE recommends feeding them with reverse osmosis treated water. ## A cleaning program built for the region A Gulf data center can meet ISO Class 8, but only if cleaning is tied to the local calendar of dust alerts, filter checks and construction work. Seal first, clean from the top down, then prove the result with a particle count and corrosion coupons. ## Frequently asked questions ### What cleanliness standard must data centers in Saudi Arabia maintain? According to ASHRAE TC 9.9 guidelines, data centers must be kept clean to ISO 14644-1 Class 8. This allows a maximum of 3,520,000 particles of 0.5 µm and larger per cubic metre of air. ### Why do Saudi data centers get dirty faster? They face fine desert dust and storm days all year, with peaks in March and August. This dust enters through door gaps, cable penetrations, and fresh-air intakes. ### How should cleaning be planned around local environmental conditions? Seal the room first by checking door sweeps, cable penetrations, and pressure. Inspect intake filters after dust alerts, and clean from the top down before retesting with a particle count. ### What are the relative humidity requirements for data centers? ASHRAE's general rule is to keep relative humidity below 60%. This prevents settled dust from absorbing moisture and becoming wet and conductive. ### Which areas are most often missed during data center cleaning? The underfloor plenum is frequently missed and needs the same care as the room above to prevent dust from blowing directly into server inlets. --- Ashraf Almuhtaseb is a Data Center Technical Cleaning Expert with over 9 years of specialized field experience since 2017, and the only independent professional in the MENA region publishing dedicated technical content on data center cleaning, contamination control, and ISO 14644 compliance. © 2026 Ashraf Almuhtaseb — https://idata.center/