By Jennifer Wolff-Gillispie HWP, LC
EDITOR’S SUMMARY: We spend most of our lives indoors, yet rarely question what our homes may be releasing into the air we breathe. From off-gassing furniture and flooring to synthetic fragrances and hidden environmental hazards, modern living spaces can harbor pollutants that accumulate over time. Understanding where they come from—and how to reduce them—may be one of the most important steps you can take to create a healthier home.
When you walk into a home, your senses go to work instantly. Your eyes scan the space—the light, the layout, the details—but just as quickly, something else registers: the smell. Sometimes it’s comforting—a slow-simmering meal on the stove or something warm baking in the oven—the kind of scent that feels instantly like home. Other times, it’s less pleasant but easily understood—a litter box that needs attention, yesterday’s trash, the stale remnants of a closed-up space. Unappealing, yes. At least the source is obvious.
In older homes, the air can carry something heavier. A damp, musty odor may suggest an underlying moisture problem, one that warrants attention. Yet some of the most significant environmental hazards, including hidden mold, lead paint, asbestos, and radon—often remain completely undetectable to the nose. Their danger exists beyond what you can perceive, revealed only through observation, recognition, and ultimately testing. Step into a new or newly renovated home, though, and something shifts. There’s a scent that’s become familiar. Clean. Crisp. New. Safe. It’s that unmistakable “new home smell.” Yet what you’re breathing is not freshness. It’s a chemical mixture entering your body with every breath.
What’s Off-Gassing in Your Home?
A house is not an inert structure—it is dynamic, responding to temperature, humidity, and the rhythm of daily life. Walls take in moisture and release it, a process called moisture buffering. Fabrics hold onto what moves through your space—dust, microbes, microscopic particles you never see. Air moves constantly through vents, seams, jambs, ducts, and windows, carrying with it everything the home harbors and circulates. As society moves toward more synthetic materials, what your home exchanges is not just air—it is pollution.
In modern houses, nearly every surface, finish, and convenience is made possible by materials engineered for durability and efficiency. From the moment they are installed, they begin to discharge chemicals into the surrounding air. This process is known as off-gassing, and it doesn’t just happen once. It continues sometimes for years. Scientists refer to many of the chemicals released through off-gassing as volatile organic compounds, or VOCs—carbon-based chemicals that evaporate easily at room temperature. Some dissipate quickly. Others persist. A separate group, semi-volatile organic compounds (SVOCs), behave differently. They settle into dust, coat surfaces, and re-enter the body through inhalation, skin contact, and ingestion. Exposure is not usually dramatic. It is cumulative. A home can look pristine and still function as a source of ongoing chemical pollution. Once you’ve become accustomed to what’s in the air, you may not even smell it anymore, yet it is there. Not from one obvious source, but from the countless materials, finishes, and conveniences that define modern living.
Flooring covers more surface area than almost anything else in your home, making it one of the largest contributors to what you’re breathing. Luxury vinyl plank (LVP), a flooring option prized for its affordability and ease of installation, is built from polyvinyl chloride—a petroleum-derived plastic that relies on plasticizers to remain flexible. Historically, these included phthalates such as DEHP and DBP, which are associated with endocrine disruption, reproductive harm, and developmental effects. Even newer formulations marketed as safer may rely on replacement chemicals with far less long-term data. If you choose LVP, look for products carrying a FloorScore certification (tests for VOC emissions and indoor air quality), GREENGUARD Gold (low chemical emissions), and/or a Phthalate-Free label. Beneath the surface, adhesives—if used—can disperse solvents like toluene, xylene, and ethylbenzene, contributing additional VOCs to indoor air.
Wall-to-wall carpeting is not a single material—it’s a system. Synthetic fibers, stain-resistant coatings, antimicrobial treatments, polyurethane padding, and installation adhesives all contribute to emissions. Additives like formaldehyde, styrene, benzene derivatives, and PFAS are commonly involved. The American Lung Association warns that children and babies—who spend the most time lying, crawling, and playing on the floor—are particularly vulnerable to respiratory problems from these chemicals.
Paint is one of the most cost-effective and dramatic ways to transform a house, but the odor lingers long after the color dries. During curing, paints emit fumes such as formaldehyde, acetone, glycol ethers, and ammonia. Even low-VOC options can contain preservatives and biocides that affect air quality. The scent may fade within days, but measurable emissions can persist for up to six months.
Furniture brings comfort, but it often arrives layered with modern industrial materials. Upholstered pieces typically contain polyurethane foam, flame retardants, adhesives, and engineered wood frames bound with formaldehyde-based resins. The fabric itself is frequently treated with chemical finishes—stain-resistant coatings, flame retardants, wrinkle-resistant treatments, and man-made dyes—that can remain in the finished product. Over time, these materials degrade, releasing both gases and microscopic particles that settle into dust, where they can be inhaled, ingested, or absorbed through the skin.
Modern cabinetry and built-ins are often made from pressed wood products like chipboard, MDF, and particleboard, held together with resins that leach formaldehyde over time. Heat and humidity can accelerate the process, extending exposure well beyond initial installation. Mattresses—often evaluated only for comfort and durability—are one of the most consistent sources of contact with these compounds simply because of proximity and time. Many contain foam, adhesives, synthetic fabrics, and flame-retardant barriers that off-gas gradually. Body heat accelerates this, concentrating those emissions directly in your breathing space during sleep—when the body is meant to restore itself.
Appliances also contribute. New dishwashers, ovens, and electronics contain plastics, sealants, wire coatings, and heat-resistant materials that undergo thermal degradation when first used. The burnt smell during the “break-in” period is often described as normal by manufacturers. On its website, Maytag states:
“Hot tar/petroleum odors: This is a normal smell for new dishwashers. Some models have sound-deadening material that smells like hot tar/petroleum. This material looks like a black rubber coating that is on the exterior of the dishwasher tub. This material also helps to retain heat inside the dishwasher and is found on most stainless steel tub dishwashers. This is normal and should dissipate in 4-6 weeks.”
Their “normal” doesn’t mean it’s necessarily harmless. This tar-like smell is most likely coming from bitumen—also known as asphalt—a petroleum product known to cause “serious injury and permanent damage” when its fumes are inhaled. Compounding the concern, not all dishwashers use bitumen and manufacturers are not always transparent about what is used. The site NonToxU found through research that commonly used materials in dishwasher insulating blankets can include PTFE laminates (Teflon), mastics, coatings, and paints—all with varying degrees of toxicity. Even everyday household items pose a risk. The plastics in electronics and storage containers release styrene, naphthalene, and other volatile chemicals—especially when heated during use, charging, or even sitting in a warm room.
What You Bring In Matters Too
By now, you may feel overwhelmed—much of what was mentioned may be outside your control. That perfect apartment in your desired location, within budget, newly updated with paint and carpet, may leave you living with choices that were made long before you arrived. Yet that’s only one source of the exposure inside your home. The other comes from the products you use and the items you choose to surround yourself with daily.
Cleaning products, laundry detergents, dryer sheets, air fresheners—these aren’t passive materials. They’re designed to be used often and activated with heat—sprayed into the air, warmed in machines, spread across surfaces. They linger long after the counters are dry, the laundry is folded, and the cleaning is complete. Inhaled or absorbed through the skin, they continue to affect the body well after the immediate task is finished.
This pattern has been normalized over decades, reinforced by messaging that framed chemical disinfectants as essential for protection, while placing far less attention on the long-term effects of repeated chemical exposure. A culture of cleanliness was built around the fear of microbes on surfaces, without the same scrutiny given to what toxicants were being released into the air and absorbed by the body in the process. That shift didn’t happen in isolation. Environmental advocate Janey Bibolet Ward wrote in her A Voice for Choice Advocacy article, “To Disinfect or Not? History, Implications, and Nontoxic Options”:
“One of the key factors that contributed to the rise of chemical disinfectants was the growing fear about infectious diseases, and the need for effective methods to control their spread. During the early 20th century, there were several major disease outbreaks, including the 1918 flu pandemic, and the polio epidemic of the 1950s, that highlighted the urgency to disinfect surfaces and control the spread of germs…In the 1940s and 1950s, the use of harsh cleaning chemicals became widespread in households. Television advertising helped to popularize the use of products containing bleach, of which dioxins—a serious, environmental pollutant—were a by-product. Commercials blasted images of sparkling clean homes, and emphasized the importance of disinfecting surfaces to prevent the outbreak of disease.”
In addition to the fear of infection, dirty or musty smells are often masked with air fresheners rather than identified and addressed at their source. Throughout history, incense, essential oils and botanicals have been used to banish unwanted odors, but by the 1940s companies like Air Wick began marketing synthetic alternatives to American consumers. Borrowing from technology used by the military to spray insecticides, aerosol room sprays were quickly adopted as an easy way to keep homes smelling clean. And that’s where some of the confusion begins. Over time, synthetic fragrances have been marketed as signals of cleanliness, freshness, and hygiene. As a result, people have come to associate these scents with a clean environment, even though fragrance itself says little about the quality of the air. Not all sources of fragrance come from sprays and air fresheners. Many scented candles contain synthetic fragrances and petroleum-based waxes that release pollutants as they burn. Even products labeled “natural” may contain ingredients that contribute to indoor air contamination.
Sanctuary, Compromised
Once inhaled, these substances become part of your body’s workload. Whether their origin is your remodeled kitchen, the new upholstered sofa, or the laundry room, the vapors travel deep into your lungs, reaching the alveoli where gas exchange occurs. These membranes are designed for efficiency—thin enough to allow oxygen into the bloodstream. That same efficiency allows chemicals to pass through as well.
From there, they circulate. They move through your bloodstream to the liver, where detoxification begins, and into fatty tissues where much is stored. Some cross into the brain. Others move through endocrine tissues, influencing signaling pathways even at low levels. Immediate effects can include irritation of the eyes, nose and throat, headaches and lightheadedness. Long-term exposure can lead to asthma, allergies, respiratory difficulties and even cancer.
While your body is equipped to process toxins—the liver, kidneys, lungs, and lymphatic system all work continuously to neutralize and eliminate what enters—modern exposure is not occasional. It is constant, cumulative, and often composed of substances the body was never designed to encounter in such quantities. Many people carry metabolic or genetic vulnerabilities that impair their ability to detoxify efficiently, resulting in illness and injury. Patricia S. Lemer’s book “Total Load Theory: Transforming Lives in Autism, ADHD, LD, SPD, and Mental Health” proposes how this works:
“Toxins disrupt every system in the body, causing them to become inflamed, distressed and dysfunctional. They can also alter and suppress immune function. Total Load Theory posits that genetically vulnerable immune systems eventually become exhausted from continuous efforts to ward off repeated assaults from the environment.”
Joseph Pizzorno, ND, founder and former president of Bastyr University, which was the first accredited college in the United States for the study of naturopathic medicine, adds:
“Due to the high level of contamination of the environment with toxic elements and molecules, toxic load should be assessed in every patient, especially those suffering chronic disease. While measuring specific toxins in blood or urine can be clinically useful, the reality is that we cannot actually measure most of the toxins to which we are exposed. We also have the challenges of the huge variation in susceptibility to damage and ability to detoxify.”
Some of these chemicals, including formaldehyde and benzene, are well studied and carry established health risks at sufficient levels of exposure, including links to cancer. But risk is not only about high doses. It is also about duration—what happens when contact with these compounds is repeated, day after day, year after year. Modern building practices can intensify this. Homes today are built tighter for energy efficiency. Air exchange is minimized to reduce heating and cooling costs. While this improves energy performance, it also limits the natural movement of air. What is released indoors tends to stay indoors. Concentrations rise, not because more toxins are emitted, but because fewer are removed.
Some of the most significant indoor hazards predate modern construction altogether. Lead is most commonly associated with homes built before 1978, when lead-based paints were still widely used. As paint ages, peels, or is disturbed during renovation, it can create contaminated dust that is easily inhaled or ingested. Young children are particularly vulnerable because lead can interfere with neurological development, learning, and behavior. Peeling paint in an older home may be a clue, but testing is the only way to know for certain.
Asbestos, once valued for its durability and fire resistance, was commonly used in insulation, flooring, roofing materials, textured ceilings, and other building products. When these materials remain intact, risk is generally lower. Problems arise when they are damaged, deteriorate with age, or are disturbed during remodeling—releasing microscopic fibers into the air. The best approach with asbestos-containing materials is to leave them undisturbed. Because asbestos cannot be identified by smell and is often difficult to recognize visually, laboratory testing is typically required.
Radon presents a different challenge altogether. This naturally occurring radioactive gas forms in soil and rock and can enter homes through foundation cracks and other openings. It has no color, odor, or taste, yet long-term exposure has been linked to an increased risk of lung cancer. The only reliable way to determine whether radon is present is through testing. Whether the concern is mold, lead, asbestos, radon, or the growing list of synthetic chemicals found in modern building materials and furnishings, the lesson is the same: what impacts the health of a home is not always obvious. Sometimes the most important clues come not from your senses, but from knowing what to look for and when to test.
Fortunately, identifying many of these hazards is often straightforward. You can purchase do-it-yourself test kits, while more comprehensive evaluations can be performed by certified environmental inspectors. If a home was built before the late 1970s, is undergoing renovation, has experienced water intrusion, or if you are experiencing unexplained health symptoms, testing may provide valuable insight. Rather than relying solely on what can be seen or smelled, testing offers an objective way to uncover hidden contaminants and determine whether remediation or further investigation is warranted.
Clearing the Air: What Actually Helps
Ventilation matters first. Opening doors and windows, even briefly, creates exchange. It allows indoor air to disperse and fresh air to enter, reducing the concentration of what has built up. In tightly sealed homes, this single habit can reset the environment in a way no product can fully replicate. Filtration becomes more effective when you understand what you’re trying to remove. HEPA filtration captures particles—dust, pollen, mold spores, and the fine debris that carries SVOCs. However, many of the most concerning indoor pollutants exist as gases rather than particles, allowing them to pass straight through HEPA filters. That’s where activated carbon filters become valuable. Unlike HEPA filters, they are designed to capture gases, helping remove volatile chemicals such as formaldehyde and solvents from indoor air. Air purifiers that combine HEPA and activated carbon filtration can address both particles and gaseous pollutants, providing more comprehensive protection.
Balance is important as well. When humidity climbs too high, mold and microbial growth take hold; when it drops too low, particles remain suspended longer and the respiratory tract becomes more susceptible. Keeping levels in a moderate range helps stabilize both. Depending on the climate, that may mean using a dehumidifier, improving ventilation, repairing water leaks, or occasionally adding moisture back into overly dry indoor air. Cleaning also plays a role. Disturbing dust without capturing it simply redistributes what’s already there, while a sealed HEPA vacuum ensures those particles are removed rather than returned to the air.
Building a Healthier Home
Improving the quality of your living space does not require a complete overhaul. It begins with awareness—understanding how everyday materials, products, and design choices influence the quality of the indoor environment. When opportunities arise to make different choices, even small ones can have a meaningful impact over time. Wood instead of composite board. Low-toxicity paints instead of chemical coatings. Lime plaster or clay finishes that allow a home to breathe. Wool, linen, cotton—materials that don’t rely on heavy chemical treatment to function. Stone and ceramic—surfaces closer to their natural state.
Solid wood furniture—as opposed to engineered wood, particleboard, MDF, or plywood—requires fewer synthetic binders and often ages beautifully rather than deteriorating. Hardwoods such as oak, maple, walnut, and cherry can last for generations, developing character instead of simply wearing out. Investing in fewer, higher-quality pieces often reduces waste while limiting reliance on the synthetic binders and finishes commonly found in composite materials.
The same principle applies to wall finishes. Zero-VOC paints have become increasingly available and can reduce one significant source of chemical exposure during and after renovation. If you’re seeking even more natural options, mineral-based paints, limewash, clay and silicate paints offer beautiful finishes while relying on natural ingredients that have been used for centuries. Beyond aesthetics, these materials often help regulate moisture and humidity more effectively, reducing the likelihood of mold growth and creating a more balanced indoor climate.
Textiles deserve the same level of consideration. You may pay attention to whether a fabric is cotton or polyester but overlook how it was produced. Natural fibers such as organic cotton, linen, hemp, and wool are often excellent choices, but the story doesn’t end with the fiber itself. Look for fabrics colored with low-impact dyes, plant-based dyes, or dyes certified to meet strict environmental and human safety standards. Certifications such as GOTS (Global Organic Textile Standard) not only address the fiber’s organic status but also place restrictions on many of the chemicals used during processing and dyeing.
Bedding merits particular attention because it is one of the materials your body remains in contact with for the longest period each day. A mattress is not simply a piece of furniture—it is an eight-hour-a-night exposure source. Organic mattresses made from latex, organic wool, and organic cotton are worth considering. Wool serves as a natural flame barrier, often eliminating the need for chemical flame-retardant treatments, while latex offers durability and support without relying on petroleum-based foams.
The layers surrounding the mattress matter as well. Sheets, mattress protectors, comforters, and pillows are in direct contact with your skin and respiratory system every night. Choosing organic cotton, linen, hemp, or wool bedding can reduce exposure to residual pesticides and chemical finishes. These natural fibers breathe, allowing proper airflow and helping to regulate body temperature. And avoiding heavily fragranced detergents and fabric softeners further contributes to a cleaner sleeping environment.
A home can still be modern, refined, and beautiful without relying heavily on manufactured materials. Traditional finishes and furnishings are often more durable and designed for longevity—a genuine win. Perfection isn’t the goal. Awareness is. Once you understand what influences indoor air quality, you can make informed choices about ventilation, filtration, household products, and the everyday habits that shape your living space. Clean air. Natural light. Finishes that age well instead of breaking down. Spaces that feel good to be in and support your well-being over time. These are the foundations of a healthier home. Because the most important part of a home isn’t what you notice when you walk in—it’s what your body experiences after you stay.
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Published on July 09, 2026.
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