What to Know About Air Pollution Inside Your Home, According Athleta Experts

Understanding Indoor Air Quality Issues

With the current focus on climate change and sustainability, many people are becoming more aware of outdoor air pollution. However, we often spend up to 90% of our time indoors, so understanding and addressing indoor air quality issues is just as crucial for our health and wellbeing.

Common Indoor Air Pollutants

There are many potential indoor air pollutants lurking in our homes and offices. Some of the most concerning include:

Volatile organic compounds (VOCs) from paints, varnishes, cleaning products, etc.
Dust mites, mold, and other biological contaminants
Radon gas seeping from the ground into buildings
Carbon monoxide from gas stoves and furnaces
Secondhand smoke

Health Effects of Indoor Air Pollution

Exposure to indoor air pollution has been linked to concerning health issues like:

Asthma attacks and aggravated allergy symptoms
Headaches, dizziness, and fatigue
Eye, nose, and throat irritation
Cancer risk from radon and secondhand smoke

Improving Indoor Air Quality

While indoor air pollution may seem scary, there are practical steps you can take to create a healthier home, including:

Open windows regularly to let in fresh air
Use green cleaning products without harsh chemicals
Invest in air purifying plants
Upgrade HVAC air filters
Test home for radon and mold if concerned

Focusing on Prevention

Like many health issues, an ounce of prevention is worth a pound of cure when it comes to indoor air quality. Simple habitual changes can reduce exposure to airborne toxins and create a safer, healthier living environment.

The Role of Humidity and Thermal Regulation in Air Quality

While most homeowners focus on particulate matter, humidity is the silent catalyst for poor air quality. Maintaining indoor humidity between 30% and 50% is the “Goldilocks zone” for health. When humidity levels consistently exceed 60%, you create a breeding ground for dust mites and mold spores, which can trigger respiratory distress even in non-allergic individuals. Conversely, air that is too dry (below 30%) can cause mucous membranes to crack, making your body more susceptible to the airborne viruses that persist in stagnant indoor environments. To manage this, invest in a hygrometer—a low-cost device that tracks humidity levels—and pair it with a smart dehumidifier or humidifier that adjusts automatically based on real-time readings rather than manual settings.

Navigating the Hidden Dangers of Combustion Appliances

Many modern homes rely on natural gas for cooking and heating, which introduces combustion byproducts directly into the living space. Nitrogen dioxide (NO2) is a frequent byproduct of gas stoves, and it is a known lung irritant that can exacerbate asthma symptoms. Beyond just cracking a window, the most effective mitigation strategy is the proper use of a range hood. Many homeowners make the mistake of using the “recirculating” setting, which merely passes air through a grease filter and blows it back into the room. Always ensure your range hood is vented to the exterior of the house. If you lack an external vent, prioritize using back burners when cooking, as they are often closer to the intake, or consider utilizing an induction hot plate to reduce your reliance on gas burners entirely.

The Impact of Home Textiles and Synthetic Materials

Your furniture, carpets, and window treatments act as “sinks” for indoor pollutants. Over time, these materials absorb VOCs, pesticides tracked in from outdoors, and flame retardants, only to slowly re-release them into the air—a process known as off-gassing. Synthetic carpets, in particular, are notorious for trapping dust and chemicals deep within their fibers, which standard vacuuming often fails to reach. To mitigate this, prioritize natural fiber rugs made of jute, wool, or cotton, and opt for furniture finished with low-VOC stains or natural oils. If you are not in a position to replace your furniture, frequent deep-cleaning with a HEPA-filtered vacuum and regular steam cleaning can significantly reduce the reservoir of pollutants embedded in your home textiles.

Optimizing HVAC Efficiency and Filtration Standards

Not all air filters are created equal. Many homeowners purchase basic fiberglass filters, which are designed primarily to protect the HVAC equipment itself from large dust bunnies, rather than protecting your lungs from microscopic pollutants. Transitioning to a filter with a MERV (Minimum Efficiency Reporting Value) rating of 11 to 13 provides a much higher level of protection, capable of capturing fine particles like smoke, bacteria, and virus carriers. However, there is a caveat: high-MERV filters are denser and can restrict airflow, potentially straining older HVAC motors. Before upgrading, check your system’s manual to ensure it can handle the increased resistance, and commit to changing these filters every 90 days—or sooner if you have pets or live in a high-dust environment.

Managing Airflow and “Dead Zones” in Modern Architecture

Modern home construction focuses heavily on energy efficiency, often resulting in “tight” homes that trap air inside. While this is great for utility bills, it creates dead zones where air does not circulate, allowing pollutants to accumulate in corners or rooms with few windows. To solve this, employ strategic mechanical ventilation. If you have rooms that feel stuffy, placing a small fan near an open window to create cross-ventilation is more effective than simply opening a window on one side of the house. Additionally, running bathroom and kitchen exhaust fans for 20 minutes after you finish your activities helps pull out moisture and trapped aerosols that would otherwise linger in the home’s central circulation path.

The Science of Personal Air Purification Systems

Standalone air purifiers are a powerful tool, but their effectiveness depends entirely on placement and CADR (Clean Air Delivery Rate). A common mistake is tucking a purifier in a corner behind a chair or under a table, which chokes the intake and prevents the unit from processing the room’s volume of air. To maximize performance, place the unit in a central, unobstructed location, preferably in the room where you spend the most time, such as the bedroom or home office. When selecting a unit, ignore marketing terms like “ozone-free” and look for the AHAM Verifide seal, which ensures the device has been independently tested for its ability to clear smoke, dust, and pollen. Remember that the purifier is only as good as its filter; once the filter reaches capacity, it can actually start releasing trapped pollutants back into the air if not replaced according to the manufacturer’s schedule.

Frequently Asked Questions

What are the top 3 indoor air pollutants I should worry about?

The most concerning indoor air pollutants are often volatile organic compounds (VOCs), radon gas, and mold/biological contaminants. These can accumulate easily indoors and have been linked to health issues.

What household items emit VOCs?

Many common household products like paints, varnishes, cleaning supplies, air fresheners, dry-cleaned clothing, building materials, and some furniture release concerning VOCs that can accumulate in indoor air.

How can I tell if my home has high radon levels?

You can purchase an easy to use radon test kit to measure the gas levels in your home’s air. High readings may require consulting a radon mitigation system professional to address the issue.

What’s the best way to control mold in my house?

Controlling moisture and humidity levels through ventilation, dehumidifiers, and prompt leak repair can help prevent mold growth. Routinely cleaning bathrooms, basements, and other damp areas also keeps mold in check.

Which air purifying plants work best?

Some great air purifying plants to place throughout your home include snake plants, aloe vera, English ivy, peace lilies, spider plants, and several varieties of philodendrons. Group them together for maximum air cleaning power!