Rats and Cockroaches Took Over a 5,000 m² Bangkok Warehouse Airofog U260 ULV Won It Back

Last updated: 2 Jun 2026 | 0 Views |

The Day Japan Cancelled an 18-Million-Baht Order

A 5,000 m² frozen-seafood warehouse in Bang Bon, Bangkok, exports prawns and squid to Japan every week. In May, the Japanese client sent its own quality team. The team found rat droppings in the back-left corner and German cockroaches on the pallet racks near the level-2 door.

Within 24 hours the cancellation email arrived: 18 million baht of orders pulled. The Japanese auditor warned that failing the next inspection would mean removal from the entire Sushi Chain approved-vendor list.

Wutthi, the warehouse manager, knew his current pest plan — snap traps and lid policies — was no longer enough. German cockroaches forage at night and hide in wall cracks, under pallets, and behind freezer units. Roof rats slip in through drains and nest in the ceiling void.

Why Rats and Cockroaches Are the Worst News in a Food Warehouse

Rats spread Leptospira, Hantavirus, and Salmonella. A single drop of urine on packaging is enough for the food to be declared unsafe.

German cockroaches (Blattella germanica) carry E. coli, Salmonella, and Listeria across every surface they walk on, and shed allergens that trigger asthma in warehouse staff.

HACCP, BRC, and FSSC 22000 all require an Integrated Pest Management plan with documented fogging records and audit-ready trend data.

Seven Costs the Warehouse Absorbed

1. 18 M baht of cancelled orders.
2. Trust eroded with a tier-1 sushi chain.
3. Emergency chemistry costs.
4. Re-audit fees from HACCP.
5. Deep-clean contractor billing.
6. Storage costs on stranded inventory.
7. Annual bonus shrinkage as profit slipped.

Why Old Methods Fail in a Warehouse

Snap traps: too slow against rat reproduction (6–8 litters of 5–10 each per year).

Poison bait: banned by many food clients due to contamination risk.

Backpack hand-sprayers: waste chemical, miss the ceiling void, and soak inventory.

Diesel thermal fogging: banned in food warehouses due to oil residue.

What the warehouse needed was a quiet, ULV cold fogger that reaches every crack and pallet gap, switches chemistry instantly, and finishes the work overnight before the morning shift returns.

Airofog U260 — the Tool the Warehouse Chose

Wutthi chose U260 for three reasons. First, the 5–50 micron mist reaches every wood-pallet crack, ceiling void, and wall gap. Second, the tank can be swapped from Cypermethrin to Chemgene HLD4H in under a minute. Third, one technician covers the full 5,000 m² in a 4-hour overnight shift.

Night one plan: 19:00 fog with insecticide, 21:00 stop and ventilate two hours, 23:00 fog with disinfectant, 02:00 cleaners remove dead pests and rodent droppings, 07:00 open as normal.

Two weeks later, the Japanese auditor returned: zero rats, zero cockroaches, every surface swab passing. A fresh 22-million-baht order was approved the same day.

Why ULV Wins in Big-Volume Storage

A 6–12 metre ceiling, dense pallet racking, and thousands of corners defeat any hand-sprayer.

U260's high-velocity airflow drives droplets 10–12 metres, lifts mist to ceiling height, and pushes it into wood-pallet seams, coating every surface in a thin film of insecticide or disinfectant.

With HACCP-approved chemistry, the warehouse meets sushi-chain and EU food-safety standards in one or two foggings per week.

10 Reasons Warehouses and Food Plants Choose Airofog U260

1. 10–12 m spray reach — covers tall warehouses.
2. Penetrates every crack and pallet gap.
3. Swap-tank chemistry — insecticide today, disinfectant tomorrow.
4. No oil residue — food-warehouse compatible.
5. One-person operation (4.5 kg).
6. 200 ml of solution per 500 m² — low cost.
7. HACCP / BRC / FSSC 22000 ready.
8. Overnight quiet operation.
9. One-year warranty + Thai parts.
10. World Health Disinfection — call 065-556-6294, LINE @whd268.

Before vs After — Bang Bon Warehouse

Before: 18 M baht cancelled, 12 rat nests in the ceiling void, 200+ German cockroaches per night on glue traps.

After (14 days): Auditor passes the site, fresh 22 M baht order approved, zero pests on glue boards, full HACCP audit pass.

Warehouse Manager Wutthi

"I used to think foggers were spray-and-pray. After running U260 overnight, the next morning I saw cockroaches dead in wall cracks I had never even noticed. This machine earns back its price in one audit pass."

— Wutthi, warehouse manager, Bang Bon