IAQ News

🌬️ High Humidity = Ideal Conditions for Mold and Dust Mites

by Alissa Baker on Jul 29, 2025

🌬️ High Humidity = Ideal Conditions for Mold and Dust Mites

Why You Should Care About the Air Inside Your Home This Summer

When the temperatures rise in July, so does the humidity—both outside and inside your home. But did you know that high humidity doesn’t just make you feel sticky and uncomfortable? It also creates the perfect environment for indoor allergens like mold and dust mites to thrive.

🦠 The Hidden Dangers of Humid Air

Humidity levels over 50% can encourage:

  • Mold growth on walls, ceilings, carpets, and inside HVAC systems

  • Dust mite populations to explode—especially in bedding, furniture, and carpeting

Both mold spores and dust mite waste are major indoor allergens and can trigger symptoms such as:

  • Sneezing, runny nose, and itchy eyes

  • Coughing or wheezing

  • Skin irritation

  • Asthma attacks and other respiratory issues


🏠 Where Mold & Dust Mites Love to Hide

Humidity affects more than just how the air feels. It seeps into fabrics, wood, and drywall, creating warm, damp pockets where allergens can take hold—like:

  • Bathrooms and basements

  • Behind walls and under carpets

  • Inside HVAC systems and air ducts

  • On window frames and around leaky pipes


đź’ˇ How to Keep Humidity Under Control

The key to improving indoor air quality during summer? Moisture management.

✅ Keep indoor humidity between 30–50%
âś… Use a dehumidifier, especially in basements or humid rooms
âś… Run exhaust fans when cooking or showering
âś… Fix leaks and water damage quickly
âś… Schedule HVAC maintenance to prevent mold inside your system
âś… Consider whole-home air purification or UV treatment systems


đź’¬ Final Thought

You can’t control the weather—but you can control your indoor air.
By managing humidity levels, you’ll not only feel more comfortable—you’ll breathe easier, too.