Flu Swept a Whole Shift at a Regional Airport Terminal - How the Team Took Back Control With the Airofog U260
Last updated: 2 Sep 2026 | 56 Views |
Flu Swept a Whole Shift at a Regional Airport Terminal - How the Team Took Back Control With the Airofog U260
A departure concourse is a sealed room where hundreds of strangers breathe the same air, several times a day. Add a delay and it becomes an incubator. This is the story of one regional airport that learned that the expensive way, and what it changed.
What actually happened — The night the board went red and the whole hall started coughing
Thanakrit, terminal operations manager at a regional airport on Thailand's southern coast, remembers that Friday in late July clearly, because it started like any other night and ended with a six-page incident report.
Heavy rain sat over the coastline all evening. Two inbound flights were diverted and three departures slipped. The result was that roughly 400 people who should have flowed through the concourse over an hour instead sat in the same hall for nearly three and a half hours.
That concourse is about 1,800 square metres with a seven-metre ceiling. The air handling is centralised and recirculates most of its air, because in a hot, humid climate pulling in large volumes of outside air is punishingly expensive. That night the system ran harder than it had all month, and the same body of air went around the room again and again.
A boy near gate three had a dry cough. His mother said it was just allergies and nobody thought twice. Passengers pulled their masks down because it was warm. Some stretched out across the seats. Others queued at the one coffee counter still open, touching the same handrail, the same water dispenser, the same lift button and the same washroom door handle, over and over, for three hours.
The last flight left at 01:30. Housekeeping came through at 02:00, mopped the floors, wiped the counters, emptied the bins, locked up and went home. By the standard procedure, everything was done.
Four days later the first ground agent called in sick. The next day three more. The day after that, five. Within a week, 14 staff who had worked that shift - check-in agents, security screeners, retail staff and cleaners - were off. Tests confirmed influenza A.
An airport running roughly thirty ground staff per shift had lost close to half of them, in the busiest week of the season.
Thanakrit had to borrow staff from two sister airports, watched overtime costs rise 180 percent across a fortnight, and then had to answer a very direct question from both the airlines and his own head office: what exactly is your terminal's infection control measure?
The answer he had to write down at the time was: mop the floors, wipe touchpoints with alcohol, and change the air filters quarterly. Read aloud in a meeting room, it sounded painfully thin for 1,800 square metres that 3,000 people pass through every day.
That was the point at which he started looking into what the world's airlines and airports actually use.
The damage nobody puts on the invoice
The damage from that night did not stop at fourteen prescriptions. The expensive part was the cost nobody issues an invoice for, and it was spread right across the organisation.
1. Headcount you cannot replace overnight
Airport roles are not day-hire positions. Screeners need training and an airside pass. Check-in agents need to be current on each airline's system. When 14 people disappear at once, what is left is the same crew doing twice the work.
The knock-on effects came in a chain. Check-in queues lengthened, fewer screening lanes could open, average passenger transit time through the building rose by 18 minutes, and when passengers reach the gate late, the aircraft leaves late. Delay penalties and stand overstay charges followed.
Worse, the remaining staff worked harder, slept less, and started going down themselves. That cycle ran nearly three weeks before things returned to normal.
2. Reputation and review risk
Regional airports compete on passenger experience. A single one-star review saying three hours in a stuffy hall, everyone coughing, sick when I got home carries more weight than ten advertisements.
Short-form video is worse. One passenger filmed the packed hall, coughing audible in the background, and posted it with a pointed caption about cleanliness standards. It passed several hundred thousand views in two days.
For a province that lives on tourism, that image does not only damage the airport. It reaches travellers who are still deciding whether to book.
3. A duty of care to vulnerable passengers
A terminal is not only business travellers. It is elderly people flying to see grandchildren, patients travelling to city hospitals for treatment, infants, and passengers who need wheelchair assistance.
The World Health Organization and Thailand's Department of Disease Control agree that influenza in the elderly and in people with underlying conditions can progress to pneumonia and hospitalisation. Letting a crowded shared space accumulate pathogens is therefore not a question of how clean the room feels. It is a genuine risk to life.
Because an airport is the funnel an entire province passes through, controlling transmission there has a multiplier effect on the surrounding community that is easy to underestimate.
4. The hidden cost inside contracts and audits
Airlines based at the airport have hygiene requirements written into their ground handling agreements. When a cluster of staff illness occurs, what follows is a request for documented measures, disinfection schedules, and evidence that certified equipment and chemicals were used.
If you cannot answer, or the paperwork does not exist, the ground handling scorecard drops - and that feeds directly into the next contract renewal.
Thanakrit summarised the lesson in one line: the most expensive thing was not the equipment. It was having no answer at all when someone asked.
Why the usual fixes keep failing
After the incident, Thanakrit's team increased the frequency of every existing measure they could. The problem did not shrink in proportion to the effort, because the existing measures were designed for a different problem.
- Wiping touchpoints with alcohol only works where a hand physically reaches. In an 1,800 square metre hall there are over 600 seats, plus handrails, signage, water dispensers and countless air vents. Wiping all of them takes longer than the hall is actually empty each night.
- Mopping handles horizontal floors. But in an incident like this, the contamination sits in droplets that drift and settle on vertical surfaces, walls, sun blinds, seat fabric and the crevices under armrests, where a mop never goes.
- Small handheld spray units produce droplets that are too coarse. The liquid lands as wet drops on seats and floors, making floors slippery and fabric damp enough to smell, while the air above head height is barely touched at all.
- Scheduled filter changes are necessary but not timely. Filters treat air that flows through the plant. They do nothing about a droplet that was just coughed out and is drifting in front of the next person in the queue.
- Closing the concourse for a deep clean is not practical. The first flight is at 06:00 and the last at midnight. The real window is about three hours, and routine cleaning already needs most of it.
- Relying on passengers to mask is not a controllable measure. The airport has no authority to enforce it, and in hot, humid conditions a great many people take the mask off the moment they sit down.
What the professionals reach for — Airofog U260
What Thanakrit found while researching was that airlines and agencies who have managed large enclosed spaces for years do not rely on cloths and handheld sprays as their primary tool. They use ULV fogging.
ULV stands for Ultra Low Volume: a very small volume of disinfectant is broken into an enormous number of micron-scale droplets. Those small droplets stay airborne long enough to travel into seat crevices, under armrests, behind signage and into air vents, then settle as a thin, even film on surfaces from every direction, not just the face pointed at the operator.
The Airofog U260 is a German-built ULV cold fogger producing 15-30 micron droplets, which is widely regarded as the sweet spot for indoor disinfection: small enough to travel and cover a room, but not so small that they simply vanish into the ventilation before settling.
For airport work specifically, this matters: the U260 is the model actually used in aviation disinfection in Thailand. Thai Airways and Bangkok Airways both selected it for cabin disinfection, and the State Railway of Thailand uses it on trains and in stations. In other words, it has already been proven in the environment closest to a departure concourse - enclosed, densely occupied, time-constrained and full of fabric seating.
10 reasons the Airofog U260 actually solves this
115-30 micron droplets reach what a cloth never will
In a concourse full of long seat rows, gaps between seats, armrest undersides and the channels where seat legs meet the floor, a cloth simply cannot get there in the time available. Micron-scale droplets from the U260 drift into those gaps with the air movement and settle on surfaces from all sides, delivering real coverage in a fraction of the time.
2Covers a large hall inside the window an airport actually has
At 50-200 ml per minute, a two-person team can walk an 1,800 square metre concourse within the overnight window without eating into routine cleaning. That is the difference between a measure that happens every night and a well-intentioned measure that never happens.
3A six-step nozzle so you can match the surface
A concourse is not one surface. Fabric seating needs a lighter, faster-drying application. Flight information displays and electronics need minimum moisture. Tiled floors and washrooms tolerate a heavier deposit. Six adjustable settings mean one machine handles every zone without compromise.
4A 50 cm gooseneck hose gets under seats and into vents
This simple accessory turns a difficult job into an easy one. The operator can feed the hose under seat rows, behind water dispensers, into return-air vents and behind counters without kneeling or moving furniture, which saves time and reduces the risk of staff injury.
53.4 kg means it gets used for the whole shift
A fogger that is too heavy gets used for half the job and then put down. At 3.4 kg, one staff member can walk and fog continuously for an hour without swapping out - which matters enormously on a thin night shift.
6A 5-litre tank means fewer stops to refill
The round 5-litre tank is sized for long runs. On an airport site where zones are far apart, cutting even a few walks back to the refill point saves meaningful time every night.
7Compatible with a wide range of disinfectants
The U260 works with many disinfectant chemistries, so the airport can choose what suits its requirements: a hospital-grade product such as Chemgene HLD4H during an outbreak, and a gentler formulation for routine work - without buying another machine.
8Certified by bodies that auditors recognise
The Airofog U260 is certified by Thailand's Department of Medical Sciences, Department of Health and the Faculty of Medicine at Mahidol University, and tested to international standards including WHO, TUV Rheinland and IPARC. When an airline or head office asks for documentation, there is something real to hand over.
9Already in service across Thai aviation and mass transit
Thai Airways and Bangkok Airways use the Airofog U260 for cabin disinfection, and the State Railway of Thailand uses it on trains and in stations. For an airport executive who has to justify a purchase, a track record in the same industry is stronger evidence than any brochure.
10Meaningfully cheaper per pass than hiring a contractor
Bringing in an external fogging crew every week is a cost that only climbs, and you wait for their schedule. Owning the machine means fogging after every last flight, re-fogging immediately when something unusual happens, and controlling the timetable entirely. Over a year the arithmetic is not close.
Before vs after the Airofog U260
What mattered most to Thanakrit was not the numbers in the table. It was that the measure is genuinely achievable every night, by the team already on site, without waiting for a contractor budget and without closing the space.
A practical 7-step rollout plan
What makes this measure actually work is not simply owning the machine. It is sequencing the work around the rhythm of the airport. This is the plan Thanakrit's team runs today.
Step 1: Split the hall into zones and fix a walking order
Divide the terminal into sub-zones - check-in, screening, seating, washrooms, retail - and set a one-way walking order from the far end back toward the exit, so the team never walks back through an area they have just treated.
Step 2: Lock the window right after the last departure
Put the fogging pass into the night shift schedule explicitly: fifteen minutes after the last passenger leaves the building, and before housekeeping starts mopping, so the fog has time to settle fully on surfaces.
Step 3: Match the chemistry to the situation
Use the standard dilution in normal conditions. During reported influenza or respiratory outbreaks, switch to a hospital-grade product - and record in the log which formulation was used on which day.
Step 4: Set the nozzle by surface type in each zone
Light setting around displays and electronics, medium across fabric seating, heavier for washrooms and hard floors. Writing the setting for each zone on the job card means a new operator can follow it immediately.
Step 5: Save the hard-to-reach points for last in each zone
Leave the awkward targets - under seat rows, return-air vents, behind water dispensers, the gaps behind counters - until the end of each zone, so the walking rhythm is never interrupted.
Step 6: Log every pass as evidence
Record date, time, zones treated, chemical and dilution, operator, and anything unusual such as a delayed flight or a reported illness. This log is what protects you in an audit.
Step 7: Review monthly against numbers you can measure
Track ground staff sick days, cleanliness complaints and passenger satisfaction scores, and compare month on month. Those are the figures management uses when deciding whether to renew the budget.
Airofog U260 full specification
For terminal work, two specifications matter most: the 15-30 micron droplet size that allows real coverage in a high-ceilinged hall, and the 3.4 kg weight that lets one person work a full shift.
From a real user
“At first I assumed we would need a huge machine costing several hundred thousand baht, because our ceiling is seven metres. But when the team demonstrated it in the actual hall, I could see the fog rise and then spread sideways on its own, rather than firing in a straight jet like the units we had used before.”
“We started twice a week after the last departure. Now we do it every night and it takes under an hour. Our own housekeeping team runs it after half a day of training.”
“Honestly, the thing that impressed me most was not the machine. It was the airline audit, when they asked for our hygiene measures and I could hand over equipment certificates, chemical documentation and a full fogging log in one folder. That same question kept me awake for three nights the year before.”
— Terminal Operations Manager, regional airport, southern Thailand (name withheld)
If your terminal still has no answer on airborne infection control, this is the moment to start.
See the Airofog U260 price and details - click here
Free consultation: 065-556-6294 | LINE @whd268
The World Health Disinfection team is happy to advise you before you decide, at no cost, and can prepare a quotation and the documents your procurement process needs.
Frequently asked questions
Can the Airofog U260 be used in the concourse while passengers are present?
It is best used when the area is clear of passengers - after the last departure or during a temporary zone closure - so the fog can work fully and safely. The space can typically be reopened around 20-30 minutes after the pass, depending on the disinfectant chosen and the building's ventilation.
Will the fog damage flight information displays or other electronics?
With the nozzle set to a lighter setting and a sensible standoff distance, 15-30 micron droplets dry quickly and do not leave standing drops. In practice most teams pass electronics on the lowest setting, or fog the surrounding air rather than the equipment directly.
How long does an 1,800 square metre concourse take?
In real use, a two-person team takes about 35-45 minutes for a hall of that size, including walking every zone and concentrating on high-risk areas such as seating and washrooms. Chemical consumption depends on the nozzle setting and ceiling height.
Do we have to use a specific disinfectant, or can we use what we already have?
The Airofog U260 is designed to work with a wide range of disinfectants. Many facilities use a hospital-grade product such as Chemgene HLD4H during outbreaks and a gentler formulation for routine work. The World Health Disinfection team can advise on dilution rates for your space and objective.
Can staff with no fogging experience operate it?
Yes. Basic operation is learned in half a day. What actually needs training is the walking pattern for full coverage, choosing nozzle settings by surface type, and correct personal protective equipment - all of which is covered by the manual and the handover training.
Is it suitable for government procurement?
Yes. The Airofog U260 comes with complete documentation from both Thai and international certifying bodies, which supports TOR preparation and equipment specification review. The team can prepare the document pack and a quotation.
Read next / related links
Read next / related links
- All ULV disinfection foggers
- Chemgene HLD4H disinfectant
- Professional disinfection service
- Certificates and test reports
Authoritative references
Related search terms: airport disinfection, ULV fogger, Airofog U260, terminal disinfection, cold fogging machine, airport hygiene standards, influenza control indoors, German ULV fogging equipment
See full details and pricing for the Airofog U260 ULV fogger from Germany - click here
