Last updated: 24 Sep 2026 | 17 Views |
This article is written for busy local leaders. You can read it in a few minutes, then forward it to your chief administrator, public health director and health officers so they can act the same day. We explain why "waiting to borrow" or "waiting to hire" a mosquito fogger costs your subdistrict valuable time, and why owning a thermal fogging machine such as the AIROFOG AT35 is an investment residents can see and auditors can verify.
It is early August. Afternoon rain has fallen almost every day for three weeks in a rural subdistrict of twelve villages surrounded by rice fields and fruit orchards. Mr. Prasert, the subdistrict mayor, is less than two years into his term. At six in the morning the village head of Moo 7 calls him: a local girl has been admitted to the district hospital after three days of high fever. The doctor suspects dengue. Two more children on the same lane are starting to run a temperature.
Prasert immediately calls Wipa, the public health officer of the Subdistrict Administrative Organization. Her answer makes him go quiet. "Mayor, our fogger broke down last year. The repair shop said they couldn't find parts. We'll have to borrow one from the neighboring municipality, but they have cases of their own. Maybe we can get it on Thursday."
The second option is to hire a private contractor. That means paperwork, quotations, and finding a contractor who is free, and the contractors already have bookings from other subdistricts. In the end, three full days pass before anyone fogs around the patient's house. Meanwhile, the village LINE group fills with questions: "What is the SAO doing?" Someone posts a photo of standing water by the road with the caption, "Are we waiting for all our kids to get sick first?"
The following week, more cases appear in Moo 7 and Moo 8. Prasert visits families, explains the delay to the local council, and answers questions from a regional reporter. The truth is that his staff were never unwilling. The real problem was simple: the subdistrict did not have a working tool on the day it needed one.
That night he asks himself one question: "If we had our own mosquito fogger that actually worked, with someone looking after it and spare parts available, would this have ended sooner?" The rest of this article answers that question.
For spraying around patient homes and in outdoor village areas, the thermal fogger is the core tool that local public health teams know best. Residents can clearly see the fog, and the fog penetrates the dense, shady spots where Aedes mosquitoes like to hide.
Aedes mosquitoes carry dengue, chikungunya and Zika. A dengue patient typically has a high fever for two to seven days, with headache, pain behind the eyes and muscle aches; some develop small bleeding spots on the skin. The dangerous phase often comes as the fever drops, when some patients can go into shock. The groups a leader should worry about most are schoolchildren, older people, people with chronic illness and pregnant women, and rural subdistricts have plenty of all four.
The standard approach used by public health teams is to control adult mosquitoes around the patient's home within a radius of roughly 100 metres as soon as possible, to break the chain of transmission. Every day of delay gives mosquitoes that have already bitten the patient time to bite someone else. That is why speed matters more than almost anything else.
Many subdistricts assume that borrowing or occasionally hiring is cheaper. When you count everything, hidden costs appear: a contractor fee every single time, staff hours spent on paperwork, travel to collect and return borrowed equipment, the risk of a borrowed machine breaking in your hands, and above all the opportunity cost. If an outbreak grows, the subdistrict ends up spending far more resources to bring it back under control.
Residents never see the forms or the regulations. They only see that "someone got sick and the SAO came late." That feeling directly affects trust in the leader. On the other hand, when residents see the SAO team fogging on the same day a case is reported, and explaining how families can protect themselves, that image communicates care better than any banner.
News in village LINE and Facebook groups travels faster than official letters. A photo of a child on an IV drip with the question "Where is the SAO?" can be shared hundreds of times overnight. Saying "we are waiting to borrow a machine" does not help. Posting a photo of your own team fogging that evening, with the schedule for the next village, reassures people far more.
Public health officers and SAO staff already carry heavy routine workloads. When they also have to chase borrowed equipment, follow up contractors, rush paperwork and field calls from worried residents, the quality of disease control suffers. Owning the equipment lets the team plan ahead, practise, and work systematically.
Borrowing from another agency: dengue often rises in many areas at once during the rainy season. The agency you borrow from needs its machine for its own residents, so your subdistrict is always at the end of the queue.
Hiring contractors case by case: this works for planned, large-scale spraying, but not for emergencies that require action within a day. The subdistrict also has limited control over the machine standard, droplet quality and timing.
Old machines that keep breaking: equipment bought long ago without a maintenance plan often refuses to start on the day it is needed. Pipes corrode, nozzles clog, and repair shops cannot find parts.
Cheap, non-standard equipment: it looks economical at purchase, but droplet size can be uneven, chemical can drip in large drops and be wasted, and there may be no local representative providing after-sales service.
Spraying at the wrong time: Aedes mosquitoes feed in the early morning and late afternoon, so fogging should happen then. Fogging at midday in strong sun and wind makes the fog rise and dissipate quickly. Owning a machine means your team chooses the right time, not whatever time suits a contractor.
No trained operators: without a machine, staff never get to practise. When equipment arrives in a hurry, they learn by trial and error, from mixing chemicals to starting the engine and cleaning up afterwards.
The AIROFOG AT35 thermal fogging machine is a heat-based mosquito fogger supplied by World Health Disinfection Co., Ltd. (WHD). It suits disease control work led by public health staff at the subdistrict level. Key facts, as stated on the product page:
| Item | AIROFOG AT35 |
|---|---|
| Type | Thermal fogger for mosquito and insect control |
| Body | 100% stainless steel, durable and corrosion-resistant |
| Weight | Lightweight, easy to carry along lanes and around houses |
| Chemicals | Both water-based and oil-based |
| Certification | Certified in Germany and the UK |
| Applications | Homes, factories, hospitals and public areas |
| WHD support | ISO and GMP certified company, 100% quality check before delivery, technicians, spare parts and full after-sales service; meets Thai government equipment standards |
For a subdistrict, what matters is not only the machine but the readiness that comes with it. A stainless steel body stores well through humid seasons. Its light weight lets officers and trained village health volunteers carry it along narrow lanes and around homes that trucks cannot reach. Compatibility with both water-based and oil-based formulations gives the team flexibility to choose chemicals that suit the situation and follow health authority guidance.
With its own mosquito fogger, the health team can build a yearly plan: preventive fogging before the school term at schools and child development centers, fogging before local festivals, and immediate control spraying around patient homes whenever a case is reported, without waiting for anyone.
| Issue | Borrow | Hire per job | Own |
|---|---|---|---|
| Response speed | Depends on lender's queue | Depends on paperwork and contractor | Set by your own team |
| Right timing | Limited | Limited | Early morning or evening |
| Repeat rounds | Difficult | New contract each time | Complete every round |
| Team skills | Inconsistent | Stay with contractor | Build up locally |
| What residents see | Delay and questions | Occasional activity | Your team acting fast |
Note: contracting still has a place for large planned campaigns. This table does not say "never hire"; it says emergency response around patient homes should rely primarily on your own government mosquito control equipment.
Leaders often ask, "Is buying worth it?" We will not quote prices or invent cost-per-head figures. Instead, here is a framework your finance and health teams can fill in with your subdistrict's real data.
With this framework, the leader has a clear rationale for the local council and auditors that buying your own mosquito sprayer is justified and that the budget was used carefully.
This is general guidance to help your procurement and health teams talk the same language. Always follow the procurement regulations and official instructions currently in force.
A mosquito fogger is durable equipment used for years. Your finance team should place it under the correct equipment budget line, and set aside a separate materials budget for chemicals and consumable parts so the new machine never sits idle for lack of insecticide. If it needs to be included in the local development plan, start the conversation with your planning team early in the year.
Ask the supplier to state how many people will be trained, where, and how to reach a technician. Good training covers chemical mixing, starting, spraying with the wind direction, safe shutdown and cleaning after use. The better your team knows the machine, the longer it will serve your subdistrict.
(The following is a composite example based on typical local public health work, not a quote from a real individual.)
"Before, every time we had a case, the first step was finding a machine, and only then could we plan. Once the subdistrict had its own thermal fogger, the order flipped. We plan first. A report comes in the morning, and by evening we are fogging around the patient's house. Volunteers walk ahead to tell neighbours. When residents see the team actually show up, they relax. I also like the stainless steel body: it is easy to clean and store, we don't worry about rust between seasons, and when something goes wrong we call a technician instead of hunting for a repair shop."
Q: Does a small subdistrict really need its own mosquito fogger?
A: If dengue appears almost every year, or you have schools, child development centers and dense communities, owning a machine lets you respond fast, which is the heart of disease control. Small subdistricts benefit even more, because one or two machines can cover the whole area.
Q: What is the difference between a thermal fogger and a ULV cold fogger?
A: A thermal fogger uses heat to create visible fog, ideal outdoors and in dense vegetation. A ULV cold fogger uses no heat and suits indoor spaces or places where smoke is not wanted. Many subdistricts keep both to match each task.
Q: How many people are needed to go out fogging?
A: Typically one operator plus one or two assistants to notify residents and watch safety. The actual number depends on the area and your health team's guidance.
Q: Can village health volunteers help?
A: Very much so, with larval surveys, notifying households and assisting with spraying under staff supervision. They should always be trained on the machine and on protective equipment first.
Q: Will fogging wipe out all the mosquitoes?
A: Fogging reduces adult mosquitoes that may carry the virus for a period of time, but it does not remove larvae in containers. It must go together with source reduction and community participation.
Q: What if the machine breaks after purchase?
A: WHD provides technicians, spare parts and after-sales service. Contact 065-556-6294 or LINE @whd268, and confirm warranty terms before procurement.
Q: Where do we start if we have never bought a mosquito sprayer before?
A: Request a quotation and specification, ask for a demonstration, then let your procurement team check documents according to the regulations. The full range is on the WHD government equipment hub page.
Request a quotation, specification sheet and demonstration of the AIROFOG AT35 thermal fogging machine today.
See AT35 product and price here
Call 065-556-6294 · LINE @whd268
Email worldhealthdisinfection@gmail.com
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Keywords: mosquito fogger, mosquito sprayer, thermal fogging machine, ULV cold fogger, government mosquito control equipment, vector control, dengue, Aedes, procurement, subdistrict mayor, AIROFOG AT35.