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What the First Day of Fall Means for Indoor Air Quality

The Autumnal Equinox marks the first day of fall. Is your home's HVAC system ready for the colder months? Learn how the upcoming season will impact your indoor air quality.

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There’s a change in the air when summer fades into fall. Not only does the temperature start to drop, but there are a distinctive smell and atmosphere in the air. It makes one think of crunching leaves, warm pies, and cozy sweaters. We think of Autumn indoor air quality, and the solutions to improve your home.

Unfortunately, the crisp fall air comes with its own set of problems. Did you know that as we enter the autumn season and cooler wet weather, your home’s indoor air quality will likely take a dive? Today, the autumnal equinox and the official start of fall is the time to re-evaluate your indoor air quality. Here are six ways your Autumn indoor air quality could suffer and six simple solutions to ensure fresh high-quality indoor air this season.

1. Less Air Flow

During warmer weather months, it’s common to have open windows and doors while home. You soak in the fresh air and get plenty of natural ventilation in your indoor space.

In the fall, however, most climates don’t allow for this. Whether too chilly or because of frequent wet weather, we tend to keep our windows closed. When you close windows, you aren’t just cutting off the cold air, you’re cutting off the source of fresh air too.

With less natural ventilation, indoor air particles and germs have fewer circulation paths, meaning they can be trapped inside. This can lead to poor indoor air quality and is perhaps most noticeable during the summer to fall shift.

The Solution to Limited Air Flow

Without the addition of natural ventilation and a nice summer breeze, your indoor space needs mechanical ventilation instead. Having an efficient ventilation system in your home will promote healthy air circulation, meaning fresh air without battling cold temperatures. We describe mechanical ventilation as lungs for your home. These ventilation systems bring in fresh outdoor air and circulate it through the entire home while getting rid of stale exhaust air. It’s also a more energy efficient system. 

2. Autumn Allergies

There are many types of particles and pollen varieties that cause allergy symptoms throughout the year. While most associate allergy season with spring and warmer months, there are multiple major allergens that are prevalent in the fall.

Ragweed is especially common in autumn because it blooms in August and pollinates throughout the fall months until the first freezing temperatures. The weed raises fall pollen levels, irritating those with seasonal allergies.

Dust mites are also more common in the fall than in other seasons. While they live in your home year-round, they flourish in the more temperate autumn climates. Without the extreme summer humidity, fall is their time to shine.

The Solution to Autumn Allergens

Sadly those that suffer from spring allergies, are just as likely to suffer from fall allergies. The best solution for those with allergies is air filters, which will play a critical role in their comfort. The importance of air filters are often overlooked, however higher rated filters do a better job of capturing air particles and can eliminate even the smallest indoor air pollutants. We suggest upgrading to MERV 13 air filters which will help capture and remove as many allergens as possible.

3. Low Humidity

It might be more noticeable or extreme in some locales than others, but humidity levels change for everyone between summer and fall. As the temperatures cool, the outdoor air becomes more dry.

That isn’t the only factor. As you make the switch to heat to keep your home warm in the chilly fall, the heater sadly also contributes to dry indoor air. As a result, most homes have noticeably drier air throughout autumn.

The Solution to Low Humidity

The fall months are the start of chapped lips and cracked hands. As a result, most people will fill their homes with room humidifiers. The problem is you likely need multiple portable humidifiers to treat the entire house. Not only do they not look great and can clutter your space, but they’re less effective.

A better solution to fighting dry winter air is whole-home humidification. Compared to stand-alone humidifiers, whole-home humidifiers work with your HVAC system to provide humidity within your system’s airflow. This is needed to keep humidity levels within the ideal 40-60% range.

4. Cold and Flu Season

Autumn isn’t just the season of pumpkin spice and changing leaves. It’s the start of cold and flu season too, meaning there are more illnesses to fight. The cooler the air gets and the more we’re forced indoors, the easier airborne illnesses can spread.

We now have an additional new illness to battle as well: COVID-19. Particles from a wide range of viruses could be circulating in your air without even realizing it.

The Solution to Airborne Germs

Thankfully, there are many HVAC solutions to fight airborne germs and viruses. We recommend pursuing a combination of filtration, ventilation and purification options. This is because your indoor air quality does impact your family’s ability to stay healthy. 

The previously mentioned whole-home humidifiers are a great step to fight against illness. Studies show that when your humidity is low, you’re more likely to have flu virus particles in your home. Ensuring that your home is in the ideal humidity range will help keep occupants healthy and aid in reducing virus particles. Additionally, air purifiers help reduce the amount of germs in the air. Similar to humidifiers, whole-home purifiers are wildly more efficient and successful at protecting your home compared to standalone units. 

Because of this, you should take a two-pronged approach to Autumn indoor air quality solutions before the cold and flu season fully arrives, and to better protect your indoor space from the novel coronavirus.

5. Likely Increase in Pollution

In many areas, fall comes with an increase in air pollution. This happens for a couple reasons. First, driving tends to increase in the colder months and make up a larger percentage of transportation methods. When it’s warm outside and something is nearby, you may consider walking or biking. When the weather is cold, chances are you’re choosing the car for every errand.

Additionally, people use more energy in general during the fall. This is because we use a mix of both A/C and heat as the weather changes to ensure comfortable temperatures. We also spend more time indoors with lights on because it gets darker earlier. The increase in energy use also increases pollution simply because it requires more energy. When there’s more air pollution outside, it’s likely to increase indoor air pollution as well.

The Solution to Air Pollution

Whole-home air purifiers are the best way to reduce pollution and improve your home’s indoor air quality. Purification systems attach to the furnace and decontaminate the air you breathe before it’s even recirculated back into the home. They’re an ideal low-maintenance solution for cleaner air.

6. Mold

Mold is a significant factor in unhealthy air. Breathing in mold is unhealthy for all of us. Unfortunately, there is more mold in the air during autumn. This is because mold thrives in wet climates and damp spaces. While falling leaves are a beautiful part of nature, fall foliage holds in moisture–allowing mold to grow. 

We often think of mold as something that stays in the corners of basements, wet spaces outdoors and the corners of our homes we tend to not think about. However, mold spores grow and circulate through wind to eventually get into your home. They also can circulate through your indoor air.

The Solution to Increased Mold

The HVAC solutions for removing mold from indoor air are already included on this list. Whole-home humidifiers, purifiers and upgrading the air filters in your home are all helpful steps to combat mold. It’s perhaps one of the best benefits of HVAC solutions, you’re almost always fixing two problems (or more!) at once. 

So, whether or not you have a mold allergy, we recommend improving your HVAC system by including IAQ systems. Even simply upgrading your air filters to MERV 13 or higher rated filters can keep your family healthier and protect from mold particles.

Taking Charge of Your Indoor Air Quality This Autumn

2020 has been quite an unpredictable year. And while there are changes in the air and environment as we officially enter fall that you can’t control … you do have power over the air you breathe in your home. In fact, it’s the one space you can control and we suggest investing in the quality of the air you breathe.

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Indoor air quality matters. Indoor air quality control solutions work. That’s why we are IAQ.Works. We are the homeowner’s advocate. Our goal is to help you create a healthier indoor space through education, awareness and action. We support clean air for all and we know it’s possible for every single indoor space. Join us on Twitter!

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