Wildfire Smoke and Indoor Air Quality: A New Concern on the Horizon 

 

Wildfire Smoke and Indoor Air Quality: A New Concern on the Horizon 

 

As a family owned and operated company since 1987, we’ve experienced our share of changing weather patterns and environmental challenges. We have helped Connecticut homeowners recover from hurricanes, ice storms, floods, and countless other weather events over the years. However the past few years have ushered in a new weather concern in the form of wildfire smoke, and the effect on our air quality during these events has been dramatic.

 

Until recently, hazy, smoke filled skies and air quality alerts were associated with other parts of the country, sometimes hundreds or even thousands of miles away - and certainly not in Connecticut. Over the past several summers, wildfire smoke has become an increasingly familiar part of life in New England, and while these events are temporary, they are also recurring, suggesting a pattern that homeowners will need to be prepared for in the years ahead.

 

While wildfire smoke in Connecticut. may seem surprising given how far away these fires are, the fact is many parts of North America are experiencing longer than usual wildfire seasons and more intense fires creating significantly more smoke than in the past. At the same time, weather patterns that steer our atmosphere have been aligned to transport those smoke plumes directly into the Northeast. 

 

The smallest particles in wildfire smoke, known as PM 2.5, are so light that they can remain suspended in the atmosphere for days, allowing them to cross multiple states, and across national borders. While we can't control the air outside, we can take meaningful steps to improve the air inside—helping our homes continue to do what they've always been meant to do: protect the families living inside them. Whether these smoky days occur once or several times each summer, they serve as a reminder that the air outside our homes isn’t always as clean as we’d like it to be, making it even more important to ensure the air you're returning to is as healthy as possible.

 

What Happens When We Breathe Wildfire Smoke

 

Every breath we take passes through a remarkable natural filtration system designed to protect our lungs from many of the airborne particles we encounter each day. The tiny hairs inside our nose, along with the mucus lining in our airways, are designed to trap larger dust particles, pollen, and other airborne contaminants before they reach our lungs. 

 

Wildfire smoke presents a unique challenge because many of its particles are extraordinarily small. The primary concern is fine particulate matter known as PM2.5 which measures just 2.5 micrometers or less in diameter. These particles are so small that many can bypass the body's natural filtering mechanisms and travel deep into your lungs reaching the tiny sacs called alveoli where oxygen is exchanged between the lungs and the bloodstream. 

 

Once the particles reach these sacks, the body recognizes them as foreign contaminants and responds by triggering an inflammation.This inflammatory response is meant to protect us, but it can also irritate the delicate tissues of the respiratory system making even healthy individuals experience symptoms like coughing, watery eyes, headaches, or wheezing and shortness of breath.

 

For the young and elderly, wildfire smoke and the PM2.5 that comes along with it becomes particularly dangerous. Children are especially vulnerable because their lungs are still developing, and older adults often have reduced lung function and are more likely to have underlying respiratory or cardiovascular conditions.

 

Individuals with existing respiratory illnesses like asthma, chronic obstructive pulmonary disease (COPD), heart disease, or other chronic health conditions may experience worse symptoms when wildfire smoke is present, making it especially important to reduce their exposure whenever possible.

 

Our homes are designed to protect us from the outdoor environment. When outdoor air quality deteriorates, understanding how smoke enters a home—and the steps we can take to reduce that infiltration—becomes just as important as understanding the smoke itself. 

 

How Wildfire Smoke Gets Inside Your Home 

 

Building science teaches us how air moves within a home once it has been introduced from the outside with the principle known as the stack effect. To put it simply, as warm air naturally rises, it escapes through small openings in the upper portions of your home like the attic. The air that escapes creates a slight vacuum of negative pressure in the lower levels of the home and draws in replacement air through cracks and gaps around the foundation, rim joists, windows, and doors. 

 

This process happens every day whether we realize it or not. In the winter, it contributes to heat loss as cold air enters the home, and in the summer months it pulls warm moist air inside along with any contaminants it carries with it. When outdoor air quality deteriorates because of wildfire smoke, the same forces that move air through your home can also draw in smoke and fire particulate matter.

 

The rim joist is located at the top of your foundation wall where the wood framing of your living space meets the basement below. While this may seem like a minor component of the structure, the rim joist is often one of the leakiest parts of a home. Over time small gaps develop around framing, plumbing penetrations, electrical wiring, and where different building materials meet. Individually these openings may seem insignificant, but together they can allow a surprising amount of outside air to enter.

The important takeaway here is understanding that our homes are not air tight. Air is constantly moving in and out of our homes, carrying with it heat, humidity, odors, and airborne particles. During a wildfire smoke event, that same air movement can introduce smoke and PM2.5 into the living space.

 

While we can’t eliminate this process entirely, understanding how it works allows us to take practical steps to deduce the amount of polluted outdoor air entering our homes. Many homeowners assume that simply closing their windows will keep wildfire smoke outside. While that certainly helps, every home still needs to exchange air with the outdoors. Small cracks in the building envelope, exhaust fans, dryer vents, and normal pressure changes all allow outside air to find its way inside. The goal isn’t to eliminate that air movement, it’s to better control it.

 

Creating a Healthier Indoor Environment During Wildfire Smoke Events 

 

Although we can't control the air outside, there are several practical steps homeowners can take to reduce their exposure to PM2.5 and other airborne contaminants indoors. Our homes should serve as a refuge when outdoor air quality declines. While no home can completely prevent wildfire smoke from entering, a combination of proper air sealing, effective filtration, and regular maintenance can significantly reduce the amount of smoke and fine particulate matter that makes its way into the living space.

 

Rim Sealing

 

One of the most effective ways to reduce the amount of wildfire smoke entering your home is by limiting uncontrolled air leakage. While no home is completely air tight, sealing gaps and cracks around the building envelope reduces the pathways through which outdoor air can enter.

 

Areas such as rim joists, attic penetrations, window and door openings and mechanical openings all contribute to the natural exchange of air between your home and the outdoors. During periods of poor air quality reducing these leaks helps limit the amount of smoke and PM2.5 that can infiltrate the living space.

 

Air sealing also offers benefits far beyond reducing the effects of wildfire smoke. It also improves energy efficiency, helps maintain consistent indoor temperatures, reduces humidity, and gives your home’s filtration system greater control over the air your family breathes.

 

Whole Home Filtration

 

If you have central air, your home’s heating and cooling system is the first line of defense. Every time your HVAC system runs, air is drawn through a filter before being redistributed throughout the home. 

 

While HVAC filters certainly help, it’s important to remember that all filters are not created equal. The type of filter, its efficiency, and how often they are changed all influence how well it can capture airborne contaminants. Homeowners should always follow their HVAC manufacturer’s recommendation when selecting a replacement filter as a filter that is too restrictive can reduce system performance.

 

At Professional Cleaning and Restoration Systems we recommend supplemental filtration such as the Aspen Air Purification System because it continuously removes fire airborne particles, including PM2.5 which is associated with wildfire smoke. 

 

Activated carbon filtration also helps reduce many of the odors and gaseous compounds that accompany a smoke event. Rather than replacing the filtration already occurring in your HVAC system, the Aspen works alongside it, removing what the HVAC system leaves behind. 

 

Your Home's Largest Filter: Beyond Mechanical Filtration

As professional soft surface cleaners, we've long understood that one of the most overlooked components of indoor air quality isn't mechanical. Your carpets, upholstery, area rugs, drapes, and other soft surfaces act as your home's largest passive filters. As airborne contaminants naturally settle out of the air, these materials capture and hold everything from everyday dust and pollen to the fine PM2.5 particles associated with wildfire smoke.

Every particle captured by your carpets and soft surfaces is one less particle remaining airborne to be inhaled. The challenge is that these soft surfaces don’t eliminate contaminants, they trap them. Over time, normal household activity like walking across a carpet or sitting on upholstered furniture can disturb those particles and allow some of them to become airborne again.

Professional carpet and upholstery cleaning complements your home's filtration systems by removing the particles that have already settled into these soft surfaces, making it an important part of a Whole Home Approach to indoor air quality and a valuable tool to fighting environmental contaminants from the outside.

Protecting your family from wildfire smoke isn't about relying on a single product or service. It's about building layers of protection throughout the home—from controlling air leakage and improving filtration to removing the particles that eventually settle into the surfaces we live with every day.

A Whole Home Approach to Wildfire Smoke 

Wildfire smoke is quickly becoming another seasonal consideration for Connecticut homeowners. While these events may only last a few days at a time, the effects they can have on indoor air quality make preparation just as important as the response. 

At Professional Cleaning and Restoration Systems, this is what we mean when we talk about our Whole Home Approach to improving indoor air quality. Every home functions as a system, and improving indoor air quality means looking at how each component works together rather than relying on any single solution.  

As Connecticut's air quality landscape continues to evolve, investing in your home's indoor environment isn't just about responding to the next wildfire smoke event. It's about ensuring your home continues to do what it has always been meant to do—protect the people living inside it.