Monthly Archives: September 2015

Insulating Your HVAC System From Legionnella

Legionnaires’ disease is a type of pneumonia that spreads through aerosolized water droplets. In almost 90% of detected cases, patients developed the disease by breathing in water droplets from an infected HVAC system. The causative bacteria called Legionella pneumophila cannot survive in a dry environment and poorly-maintained HVAC systems are perfect breeding places for the nasty bacteria. However, HVAC engineers will tell you that a property maintained HVAC system is usually free of moisture completely and it cannot become a breeding place for the bacteria. You may not have expertise in maintaining an HVAC system. In that case, how do you make sure that the building/ residence is free of the bacteria?


Follow a Simple Maintenance Procedure to Ensure a Clean HVAC System

You can call in your HVAC system contractor to check your system once in six months. This is usually more than enough to ensure that your system is clean and free of infection. However, you can be proactive and you can evaluate your system every month to prevent any potential outbreaks. Here is what you can do:

  • Assess your system for its risk — Find out whether the water used in your heating and cooling systems is stagnating in the system. Stagnating water can cause corrosion, mold, fungus, and a biofilm that encourages the growth of infectious bacteria.
  • Assess the parts of your HVAC systems that are most at risk — Cooling towers, intake valves, filters, ducts, and water condensers have been associated with infections. Make sure that these parts of the HVAC system are checked at least once in two months to ensure sterility.
  • Implement preventive procedures
    • Ensure that the water spray released from your cooling towers is controlled.
    • Regulate the temperature inside the HVAC system above 60 degrees C and below 20 degrees C.
    • Treat water used in the system to prevent bacterial growth.
    • Ask your maintenance crew to use back-up cleaning system like copper / silver ionization, ozone, and UV radiation to clean out the system regularly.
  • Take samples — If you aren’t sure about your system, sampling and testing is an ideal way to ensure that your system is free of infection.

There are just a few of the steps you can follow to ensure that your HVAC system is infection-free. In case you have queries, you can write in to us or call for information. Our expert engineer staff will be glad to solve your queries and help you assess your building/home HVAC systems. Also, do follow our blog for more articles about HVAC systems.