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Writer's pictureDrew Porter

What Is Seasonal Allergic Rhinitis, and How Can Your HVAC System Help?


As the leaves change and fall arrives, many look forward to cooler weather, cozy nights, and everything pumpkin-spiced. But for those with seasonal allergic rhinitis, or “hay fever,” autumn can bring a new set of allergy symptoms. The arrival of ragweed pollen, mold spores, and other fall allergens often means an increase in sneezing, congestion, and watery eyes. Understanding how your HVAC system can play a role in managing these allergens is a crucial step toward breathing easier this season. Here’s how your HVAC can help support indoor air quality and reduce allergy symptoms during the fall.


What Is Seasonal Allergic Rhinitis?

Seasonal allergic rhinitis is the medical term for hay fever. This condition is an allergic reaction to airborne particles that are common during particular seasons. Symptoms of hay fever include sneezing, itchy and watery eyes, a runny nose, and nasal congestion. For many, these symptoms ramp up in fall as allergens shift indoors.


Common Fall Allergens

As people spend more time indoors during the cooler months, a mix of outdoor and indoor allergens can become trapped inside, exacerbating symptoms. Common fall allergens include:

  • Ragweed Pollen: A primary culprit in fall allergies, ragweed pollen can travel hundreds of miles and often lingers through October.

  • Mold Spores: Mold thrives in damp environments, like fallen leaves. When these leaves are tracked inside, mold spores can trigger reactions.

  • Indoor Allergens: Pet dander, dust mites, and other indoor particles become more prevalent as windows close and ventilation decreases.


How Your HVAC System Can Help Reduce Allergy Symptoms

Your HVAC system is crucial for indoor air quality, especially during allergy season. Here’s how it can help:


High-Quality Air Filters

  1. Filter Type Matters: One of the simplest ways to manage allergens indoors is by using a high-quality air filter. HEPA filters and those with a MERV (Minimum Efficiency Reporting Value) rating between 8 and 13 are ideal for capturing smaller particles like pollen, mold spores, and pet dander, helping to purify the air you breathe.

  2. MERV Ratings Explained: MERV ratings measure a filter’s effectiveness, with higher ratings capturing smaller particles. Generally, filters rated MERV 8 to 13 are recommended for homes with allergy sufferers, as they are efficient at trapping airborne particles that can worsen allergy symptoms.

  3. Regular Filter Changes: Filters should be changed every 1-3 months during high-allergy seasons to ensure optimal performance. A clean filter allows your HVAC system to work more efficiently, keeping allergens out of the air and energy costs down.


Whole-Home Air Purifiers

Adding a whole-home air purifier can offer an extra layer of defense against allergens. Unlike portable air purifiers, whole-home purifiers integrate directly with your HVAC system, providing consistent air cleaning throughout your home.

  • How They Work: These systems use advanced filtration and sometimes UV light to neutralize airborne allergens, bacteria, and even viruses as air cycles through your HVAC. Whole-home air purifiers are particularly beneficial for homes with pets or family members sensitive to seasonal changes.

  • Beyond Allergies: In addition to reducing allergens, whole-home purifiers can also help remove odors, smoke particles, and volatile organic compounds (VOCs), resulting in fresher, cleaner air indoors.


Humidity Control

Indoor humidity plays a significant role in managing allergens, especially in fall and winter when heating systems can make indoor air feel dry.

  1. Humidity Levels and Allergies: Both too little and too much humidity can impact comfort and air quality. Low humidity can dry out sinuses, increasing susceptibility to allergens, while high humidity can encourage the growth of mold and dust mites. Aim to keep indoor humidity around 40-50% to strike a comfortable balance.

  2. Whole-Home Humidifiers and Dehumidifiers: Adding a humidifier can help maintain ideal indoor moisture levels as temperatures drop, while a dehumidifier can be useful for damp rooms like basements. Both help to create an environment that is less hospitable to allergens, ensuring cleaner, healthier indoor air.


Professional HVAC Maintenance

Seasonal HVAC maintenance is an essential step to prepare for allergy season and beyond. A thorough check-up by a professional ensures that your system is clean, efficient, and ready to tackle the indoor air quality challenges fall brings.

  • Efficiency and Safety: A professional tune-up can improve system efficiency, ensuring that your HVAC is circulating air optimally and filtering out as many allergens as possible.

  • Preventing Future Problems: During maintenance, an HVAC technician can address small issues before they become larger problems, potentially saving you on repairs and helping your system last longer.


Practical Steps for Reducing Allergens with Your HVAC System

  • Schedule Fall Maintenance: Ensuring your system is ready for the season will help reduce allergens indoors and keep your HVAC running efficiently.

  • Invest in a Programmable Thermostat: Keeping the temperature stable can help maintain balanced humidity levels, reducing allergens such as mold and dust mites.

  • Close Windows on High-Pollen Days: Fall days can be beautiful, but if pollen counts are high, keeping windows closed and relying on your HVAC to circulate filtered air will help prevent allergens from entering your home.


Fall is a beautiful season, but it doesn’t have to be one filled with sneezing and congestion. With the right HVAC practices, you can enjoy the season while minimizing allergy symptoms. Upgrading air filters, managing humidity, and investing in a whole-home purifier are all ways to support indoor air quality and create a healthier, more comfortable home. Schedule your fall maintenance with Scenic Air Solutions today to ensure your HVAC is prepared to handle allergy season.

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