Why February is One of the Most Important Months for Indoor Air Quality

By mid-February, most of us have mastered the art of "battening down the hatches." We’ve caulked around the windows, added weatherstripping to the doors, and kept the heat cranked up to stay cozy (well, maybe not this February).

But there’s a trade-off. When we seal our homes tight to keep the cold out, we also trap everything else inside. If your house isn’t properly vented, your indoor air quality (IAQ) can plummet, leading to more than just a "stuffy" room; it can lead to health risks and property damage.

1. Radon and Indoor Air Quality

Did you know that Radon levels are often at their highest during the winter? Radon is a colorless, odorless gas that enters your home through the foundation. Because your windows are closed and the "stack effect" (warm air rising and pulling air from the ground) is in full swing, February is one of the best times to test.

• The Check: If you haven’t tested for Radon in the last two years, now is the time.

  
  

2. The Danger of Backdrafting

In a tightly sealed home, your appliances compete for air. If your furnace, water heater, or fireplace doesn't have enough "make-up air," it can actually pull combustion gases, including Carbon Monoxide, back down the chimney/vent and into your living space.

• The Check: Look for signs of soot or scorching around the draft hood of your water heater. Ensure your CO detectors are less than 10 years old and have fresh batteries.

  
  

3. Humidity: The Silent Wall-Killer

With the windows shut, activities like showering, cooking, and even breathing raise the humidity levels. If that moist air hits a cold exterior wall behind a couch or inside a closet, it turns into condensation.

• The Check: Check the corners of your ceiling and the back of closets for "shadowing" or small black spots. If your windows are constantly fogged up, your home's humidity is too high, creating a prime environment for mold.

  
  

4. Check Your "Lungs" (HVAC & Filters)

Dirty Furnace Filter, Time to Replace

Your furnace filter can collect dust, pet dander, and allergens. By February, that filter has been working overtime for a few months straight.

• The Check: Pull your filter today. If it’s grey or fuzzy, your blower motor is straining, so swap it out for a fresh one to improve both air quality and system efficiency.

  
  

The Bottom Line

A healthy home is a balanced home. You want it to be energy-efficient, but not at the expense of your lungs or your safety.