Hantavirus Alert: Beyond the “Three No’s for Rodent Prevention,” Why Indoor Air Filtration Is a Key Epidemic-Prevention Measure for Factories and Office Buildings

Recent rodent infestation concerns in northern regions have once again drawn public attention. With reported cases of Hantavirus emerging, environmental management in businesses and factories can no longer be overlooked. In the face of this potentially fatal virus—primarily transmitted through airborne particles—traditional rodent control alone is not enough. Effective Indoor Air Quality (IAQ) management and the implementation of High-Efficiency Particulate Air (HEPA) filtration systems are becoming the final line of defense in epidemic prevention.

The Deadly Threat of Hantavirus: How Does It Spread Through the Air?

Many people mistakenly believe that Hantavirus infection only occurs through rodent bites. In fact, according to educational materials from the Taiwan Centers for Disease Control, the primary route of transmission is inhalation through the respiratory system.

When infected rodents—such as sewer rats or roof rats—leave urine, droppings, or saliva in the environment, these contaminants can dry out and become aerosolized as dust particles. When individuals inhale these airborne particles while cleaning contaminated areas or staying in poorly ventilated enclosed spaces, the risk of infection increases significantly.

Hidden Vulnerabilities in Industrial and Commercial Buildings: Ventilation Systems

In factories, warehouses, and older office buildings, rodents often travel through piping systems, HVAC ducts, and ceiling voids. If a building’s ventilation and filtration systems are inadequate, or if filters are not replaced regularly, virus-carrying particles may circulate throughout indoor spaces via the central HVAC system.

Why Should Your Air Filters Be Upgraded?

To reduce the risks associated with airborne pathogens such as Hantavirus, businesses should review and upgrade their existing filtration systems:

Capture Fine Dust Particles

Hantavirus particles are commonly attached to dried waste dust smaller than 5 microns in diameter. Standard pre-filters can only capture larger particles. It is recommended to use at least MERV 13-rated filters, or even HEPA filters (with 99.97% efficiency or higher) in critical areas, to effectively capture contaminated aerosols and fine particles.

Reduce Indoor Dead Zones

Proper ventilation and a high Air Changes per Hour (ACH) rate help dilute indoor contaminants and reduce employee exposure risks.

Prevent HVAC System Contamination

Regular replacement of filters inside Air Handling Units (AHUs) prevents dust accumulation in air ducts, reducing the likelihood of ducts becoming nesting and contamination sites for rodents.

Three Practical Strategies for Hantavirus Prevention

To ensure workplace and facility safety, we recommend combining environmental control measures with advanced air filtration strategies.

1. Implement the “Three No’s” of Rodent Prevention

• Do not let rodents enter: Seal openings in ceilings, floors, and HVAC ducts.
• Do not let rodents stay: Remove clutter and eliminate hiding places in warehouses and storage areas.
• Do not let rodents feed: Properly manage food waste and animal feed.

2. Air Protection During Cleaning (Critical!)

When cleaning areas potentially contaminated by rodents, never sweep directly or use a vacuum cleaner.

Recommended Procedure:
Wear gloves and a mask first. Spray the contaminated area with a 1:10 diluted bleach solution and allow it to remain wet for 30 minutes before wiping clean.

Air Filtration Support:
During cleaning, operate a high-performance portable air purifier equipped with a HEPA filter to capture airborne dust particles stirred up during the process.

3. Regularly Upgrade HVAC Filtration Systems

Industries with higher rodent exposure risks—such as food processing plants, electronics manufacturing facilities, and logistics centers—should consider professional HVAC system assessments to ensure filtration efficiency and airtightness meet modern epidemic prevention standards.

Professional Filtration Solutions for Health and Food Safety

As a professional industrial air filter manufacturer, we understand the critical importance of clean air to business operations. In response to growing public health concerns caused by increasing rodent activity, we provide comprehensive filtration solutions ranging from primary and medium-efficiency filters to HEPA high-efficiency filtration systems.

If you are planning to optimize the HVAC filtration systems in your factory, office, or warehouse, contact our technical team today. We are ready to provide professional consultation tailored to your epidemic prevention and indoor air quality requirements.