Why it matters
Particulate matter is microscopic solid and liquid material suspended in air, classified by diameter in micrometres. In Dubai, construction dust, vehicle emissions and regional shamal winds push outdoor particulate loads well above what temperate-climate buildings are designed to filter.
The three sizes behave differently inside the body. PM10 is trapped largely in the nose and throat. PM2.5 reaches the deep lung. PM1.0 crosses into the bloodstream. That is why a monitor reporting all three is more useful than one reporting a single figure.
World standards
- PM2.5: annual mean below 5 µg/m³, 24-hour mean below 15 µg/m³
- PM10: annual mean below 15 µg/m³, 24-hour mean below 45 µg/m³
Reference: WHO Global Air Quality Guidelines, 2021.
UAE standards
- PM2.5: 35 µg/m³ over 24 hours, 100 µg/m³ over 1 hour
- PM10: 150 µg/m³ over 24 hours, 100 µg/m³ over 8 hours
- These apply to both new and existing buildings
Note the gap between the two sets of figures. The Dubai Municipality ceilings are enforceable compliance limits. The WHO figures are health-based targets. Meeting DM is the legal floor, not the healthy optimum.
Widely repeated online: “suspended particulates below 150 µg/m³ over an 8-hour window”. That mixes two rows of the table. 150 µg/m³ is the 24-hour figure; the 8-hour figure is 100 µg/m³.
Reference: DM-HSD-GU119-IAQ Version 3 (2024), Tables 1 and 2.
Impact on health
Fine particulate triggers asthma attacks, aggravates chronic bronchitis and measurably reduces lung function in children. Long-term exposure is associated with cardiovascular disease, systemic inflammation and increased respiratory infection risk.
How to reduce it
- Keep windows and balcony doors shut during shamal conditions, and run the AC on recirculation rather than fresh-air intake while dust persists
- Fit pleated filters at MERV 8 or better and change them monthly through summer. Dubai’s dust load shortens filter life well below manufacturer ratings written for European conditions
- Have supply and return ducts professionally cleaned annually
- Check AHU drain pans monthly, which is the interval DM specifies for drain trays
If a reading stays high with windows closed and filters new, the fault is usually a leaking duct or an unsealed filter frame drawing unfiltered air past the filter, not the filter itself.
Need this equipment serviced?
Inspection first, fixed written price before any work begins, and a photo report on completion.