Can Normal Janitors Do a Cleaning Inside Data Center?

Can Regular Janitors Clean Inside a Data Center?

No. A regular janitor should not clean inside a data hall unless they have been trained for that environment. Even ASHRAE's data center contamination guidelines, when they discuss zinc whisker remediation, point owners toward hiring professionals to clean the data center.

The reason is not that janitorial work is careless. It is that the habits that make an office clean, such as damp mopping, spray-and-wipe and an upright vacuum, are the same habits that put dust, moisture and static into live IT equipment.

What makes a data hall different from an office?

A data hall is held to ISO 14644-1 Class 8, the level set in the ASHRAE TC 9.9 particulate guidelines. The cooling system moves huge volumes of air through every server, so any dust lifted by cleaning ends up at the equipment intakes within minutes.

ASHRAE lists what that dust does: it blocks cooling airflow, interferes with moving parts, causes corrosion when it settles on circuit boards and can bridge electronic conductors. Cleaning done the wrong way adds to all four.

Why are untrained cleaners a risk?

The common problems fall into four groups:

• Wrong tools. A standard vacuum blows fine dust back out through its exhaust. Ordinary cloths and brooms shed fibres and generate static.
• Wrong products. Household cleaners can be conductive, leave residue or release vapours near intakes.
• No ESD awareness. The ANSI/ESD S20.20 standard is written for parts that can be damaged by a discharge of 100 volts on the human body model. A person walking across a floor can carry far more than that without feeling it.
• No sense of the room. Lifting the wrong floor tile, unplugging a cleaning machine from a rack outlet, or blocking a perforated tile with a mop bucket all affect a live room.

What skills does a data center cleaner need?

The ESD side is explained in what is ESD cleaning in data centers, and the clothing in what to wear for technical cleaning.

Who should do the work?

There are two sound options.

A trained specialist team

A team that works only in data centers and cleanrooms brings the tools, the method and the test equipment. Ask for their training records, their method statement and a sample ISO 14644-1 test report before you award the work.

Trained in-house staff

If you prefer your own people, train them properly, give them the right equipment and supervise them. Write a site standard operating procedure (SOP) that names the tools, products, sequence and no-go areas, and make the training part of the site induction.

Whichever option you choose, the site should still control the work: a permit for each visit, an escort or supervisor from the data center team, an agreed list of areas and racks, and a short report at the end of each shift. Good teams welcome these rules, because they protect the cleaner as much as the equipment.

What can regular janitors still do?

Quite a lot, outside the white space. Corridors, offices, toilets, the loading dock and the approach to the data hall are normal janitorial areas. Keeping them clean reduces what reaches the entrance mats.

Inside the data hall, they can help under supervision with non-technical tasks such as emptying bins outside the room or restocking shoe covers. They should not clean racks, lift tiles or work in the plenum.

The bottom line

Data center cleaning is a technical job. It needs trained people, HEPA tools, ESD control and a written method. The cost of getting it wrong is described in why cleaning your data center is not optional, and the different scopes of work in types of data center cleaning.

Keep your janitorial team for the building. Give the white space to people trained for it.