Share:

The flu season, which runs from October to May, is proving to be both unusual and dangerous this year. For the second year in a row, Americans are experiencing a double-barrel flu season—two virus strains are circulating (type A and B). Even if you’ve already had the flu, you could be exposed to a new strain and get sick a second time before the end of spring. The flu vaccine is still the most effective protection against infection, but you can take additional precautions by making your home environment safe. Surprisingly, the key to keeping your household healthy may be your HVAC system. Here’s why. 

How Does Climate Affect the Flu?  

The flu virus in the United States, which peaks in the months from December to February, is most active from fall to spring. For generations, people assumed the cold weather was to blame, but new research suggests otherwise. Instead, low-humidity levels are correlated with higher transmission rates and reduced immunity against the flu. 

How Does Humidity Affect Transmission Rates?  

In a simulated experiment, the Centers for Disease Control and Prevention (CDC) tested whether higher humidity levels lower flu transmission. They placed test mannequins in a room with 23% humidity levels. The mannequins released an aerosol transmission of the virus, much like a cough. Researchers then captured these particles and tested their ability to infect human cells. In this scenario, about 75% of particles caused infection. When the CDC raised humidity levels to 43%, however, the infection rate plummeted to just 14%. Furthermore, after 15 minutes of exposure to humid air, most flu particles became inactive.  

How Does Humidity Affect Immunity?  

HVACPreliminary research also shows low humidity impairs the immune system. In particular, the upper respiratory system doesn’t dispel viral particles and mucus before air reaches the lungs. When an infection forms in the lungs, it affects two additional cellular functions, making it more difficult for the immune system to repair damage and signal neighboring cells for support. Research results seem to imply people are more likely to catch the flu and experience worse symptoms in a dry environment compared to a moist one. 

What’s the Ideal Humidity Level? 

The ideal humidity level is around 45%. If your home has more than 50% humidity, it could cause mold and condensation on the windows. Drop below 35%, however, and you may experience cracks in your wall paint, static electricity, and more coughing and sneezing if the flu virus makes it inside.

 

If you want to update your HVAC system by installing a whole-house humidifier, the contractors at B&B Plumbing & Heating in Oxford, OH, will help. They provide a variety of heating and air conditioning services, including duct cleaning and filter replacements, to ensure indoor air quality is fresh and healthy. To learn more about their humidifiers, air cleaners, and air purifiers, visit their website, or call (513) 523-4010 to schedule an appointment today.

tracking