Outside temperatures are starting to ease downward, and many people will soon turn on their furnace to stay warm. The move to stay comfy may have the opposite effect, however – some people experience a scratchy throat, stuffy nose and headaches each fall when they start using their furnace. Could there be a connection?

Many experts say yes. This phenomenon is called “heater sickness” or “furnace flu.” According to HVAC.com, the internal parts of heating systems can accumulate dust, allergens and other pollutants during the spring and summer months.

Then, when you turn on the heating system, these particles get blown into the air. According to the Environmental Protection Agency (EPA), concentrations of some pollutants can be two to five times higher indoors versus outdoors. Once you inhale this air, it’s no surprise that your body’s immune system starts acting up.

Another reason your furnace could be making you sick is that even clean, hot air has a lower humidity level. This drier air can irritate airways, causing a cough and nasal discomfort. Adding to that, many viruses spread faster in drier air, and you can see why your chance of getting sick goes up when the temperature goes down.

If you suspect your cold-like symptoms are heater sickness-related, you should talk to your healthcare provider to rule out other causes. You can also discuss any over-the-counter or prescription medications that may ease your symptoms.

Here are other things you can do to help decrease your chance of developing furnace flu:

• Use a humidifier.
  
  
• Regularly clean your home.
  
  
• Stay hydrated.
  
  
• Choose a high-quality furnace filter, one with a Minimum Efficiency Reporting Values (MERV) rating of 11 or higher.
  
  
• Regularly inspect and replace your air filter. Check the package instructions on your filter for guidance.
  
  
• Schedule an inspection by an HVAC technician. They should come out annually to test your furnace and ductwork to make sure everything is clean and in working order.
  
  
• Clean your vent covers. Remove each vent cover and scrub with a brush and cleaning solution over a sink to loosen debris. While the cover is off, use a vacuum with a hose attachment to clean inside the vent opening. Replace the vent cover when dry.

Sources:
HVAC.com
Environmental Protection Agency