1. Cold Doesn’t Kill Mold — It Only Slows It Down

Many people assume that cold temperatures mean “sterile and safe.” In reality, mold doesn’t die in the cold — it merely enters a state of slowed metabolism or dormancy.
Research has shown that:

• Cladosporium, Penicillium, and Acremoniumspecies can grow at temperatures between 0–10 °C.
• Even inside refrigerators or cold storage rooms, mold spores remain viableand can resume growth once moisture appears.

In short: low temperature delays contamination, but it does not prevent it.

2. Common Hotspots of Mold Contamination in Cold Environments
3. Cold Storage & Cold-Chain Packaging
   Condensation on surfaces and corners provides ideal conditions for mold growth.
   Typical species:Penicillium expansum, Mucor racemosus
   Impact:Moldy surfaces, discoloration, unpleasant odor, and food spoilage.
4. Laboratories & Pharmaceutical Cold Rooms
   Residual humidity and nutrient residues promote mold growth on walls, shelves, and sample containers.
   Typical species:Aspergillus versicolor, Cladosporium herbarum
   Impact:Cross-contamination, testing deviations, and sample failures.
5. HVAC & Ventilation Systems
   Condensate pans and filters become breeding grounds for mold.
   Impact:Spores spread through the airflow, causing widespread contamination across clean areas.
6. Key Control Principle: Humidity Matters More Than Temperature

Temperature alone cannot suppress mold. Humidity control is the decisive factor.

✅ Maintain relative humidity below 60%
✅ Prevent condensation and water accumulation
✅ Keep airflow continuous and balanced
✅ Always perform disinfection after cleaning to remove spores completely

4. Why Mold Grows in Buildings — Root Causes

Mold growth in facilities stems from a combination of environmental and structural factors:

1. Humidity:Ideal mold growth occurs when relative humidity exceeds 75%.
2. Temperature:Mold thrives at 22–35 °C but can still grow slowly even at 0–10 °C.
3. Ventilation:Poor air circulation accelerates spore accumulation and spread.
4. Building Materials:Porous or moisture-absorbing materials, and thermal bridges, trap condensation.
5. Water Leakage:Seepage in walls or floors rapidly increases mold growth risk.
6. Sealing and Insulation:Highly sealed modern buildings retain moisture indoors.
7. Air Conditioning Systems:Improper drainage or condensate management leads to persistent dampness.
8. Human Habits:Poor maintenance, infrequent cleaning, and excessive cooling without dehumidification aggravate mold issues.
9. Vantsteri’s Low-Temperature Decontamination Solution

To address microbial contamination in cold storage, laboratories, and pharmaceutical cleanrooms,
Vantsteri has developed an advanced low-temperature Vaporized Hydrogen Peroxide (VHP) Decontamination System, designed for extreme environments:

• Effective even at –18 °C, capable of inactivating mold spores and other resilient microbes
• Portable and rapidly deployable, suitable for both emergency and routine use
• Validated by chemical and biological indicators, ensuring compliance and traceability
• Integrated with HVAC cleaning and filter replacement, forming a complete contamination-control process

With Vantsteri, facilities can achieve truly mold-free, safe, and compliant low-temperature environments.

Cold does not mean safe — proactive microbial control keeps your operation ahead of the threat.

#DisinfectionScience #VHPDecontamination #PharmaSterilization #LabDecontamination

For more case studies and technical solutions,
follow Vantsteri Biotech on WeChat or visit our official website.

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📧 Email: chengqinfang@51xd.com.cn
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