Cleaning in a data centre is not about moving dust. It is about removing it. That difference lives in the filter grade. HEPA 14 is why the particles you extract do not return to the room.
What the standard says
HEPA filters are classified under EN 1822. An H14 filter captures at least 99.995% of particles at the most penetrating particle size (MPPS), typically around 0.1–0.3 µm, exactly the fraction that reaches deepest into equipment.
Why a normal vacuum fails
Domestic or construction vacuums pull contaminated air through coarse filters and blow the finest particles straight back out. In a data hall that means the dust you lift comes out the other side, and re-settles on equipment.
The difference in practice
With HEPA 14 filtration, dust is genuinely removed from the environment rather than redistributed. The same principle applies to the sticky mats, wipes and methods that keep the airborne load low.
Key takeaways
- HEPA 14 is classified under EN 1822.
- ≥ 99.995% capture at the hardest particle size.
- Ordinary vacuums blow fine dust back out.
- Dust is removed, not redistributed.