How to Combat Allergies with Your HVAC System: A Guide to Cleaner Indoor Air

by | May 1, 2024 | Health, Indoor Air Quality

If you find yourself constantly sneezing or dealing with itchy eyes indoors, your HVAC system might be playing a role in spreading allergens around your home or office. While many believe their allergies are directly caused by the HVAC unit itself, it’s actually the pollutants traveling through the system. Let’s explore how you can turn your HVAC into an ally in the fight against indoor allergens.

Understanding the Role of Your HVAC in Allergy Prevention

The air circulating through your HVAC system can carry pollen, dust, mold, and other allergens that contribute to your symptoms. Fortunately, there are several effective strategies you can implement to minimize this issue and enhance the air quality of your living or work spaces.

1. Choose High-MERV Air Filters

One of the simplest ways to prevent allergens from circulating through your HVAC system is to use air filters with a high Minimum Efficiency Reporting Value (MERV). MERV ratings range from 1 to 20, where higher numbers block smaller particles, significantly reducing the amount of allergens passing through your air. Remember, while low-MERV filters are good for protecting your HVAC equipment from large debris, high-MERV filters are better for protecting your health by trapping finer particles like pollen and mold spores.

What is a MERV Rating?

MERV stands for Minimum Efficiency Reporting Value, which measures a filter’s ability to capture larger particles between 0.3 and 10 microns. This rating helps you understand how effectively a filter can remove contaminants from the air, helping you choose the right filter based on your specific health needs.

2. Install Additional Purification Devices

To further enhance your HVAC’s ability to combat allergens, consider adding specialized devices like a duct-mount purifier and a coil-mounted UV light:

  • Duct-Mount Purifier: This device fits into your ductwork and uses ionization and UV light technology to neutralize allergens and other particles, ensuring that only clean air is circulated through your vents.
  • Coil-Mounted UV Light: Installing a UV light on your HVAC coil helps kill mold, bacteria, and viruses upon contact. This is particularly effective as these components are often moist and prone to microbial growth, which can be a significant source of indoor air pollution.


By understanding the link between your allergies and your HVAC system, you can take proactive steps to improve the air quality in your home or workplace. Upgrading to high-MERV air filters and installing additional air purifying devices can make a significant difference in reducing your allergy symptoms and enhancing overall indoor air comfort. Remember, a clean HVAC system not only supports your health but also operates more efficiently, saving you money on energy costs in the long run.

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