What you can’t see inside air ducts can put the health of an entire building at risk.

At Teinnova, we would like to share and raise awareness of the information published by AIISA regarding the risks associated with poor hygiene in HVAC systems.

The Hantavirus case has once again brought attention to an often invisible problem: biological contamination inside air ducts, AHUs (Air Handling Units), and HVAC systems.

What happens when air ducts are not cleaned and disinfected?

Over time, HVAC systems can accumulate:
• Dust and dirt
• Organic debris
• Rodent nests and droppings
• Moisture and biological matter

If rodents nest inside ductwork or near air intakes, the system can draw in contaminated particles and distribute them throughout the building. When facilities that have been inactive for weeks or months are restarted, these contaminants can quickly spread through the airflow.

And the problem is not limited to Hantavirus alone.

⚠️ A contaminated air distribution system can contribute to the spread of:
• Viruses
• Bacteria
• Fungi and mold
• Allergens and harmful particles

All of these factors contribute to the well-known “Sick Building Syndrome,” directly affecting the health, well-being, and productivity of building occupants.

The risk is especially critical in:
• Hospitals and healthcare facilities
• Offices and corporate buildings
• Shopping centers
• Schools and residential care facilities
• Buildings that have remained closed for extended periods

✅ Prevention requires:
✔️ Regular inspections
✔️ Professional cleaning of air ducts and AHUs
✔️ Certified HVAC system disinfection
✔️ Microbiological monitoring and indoor air quality control

At Teinnova, we believe that ensuring healthy indoor air is no longer an option—it is a necessity to protect both buildings and the people inside them.