When winter arrives, most of us focus on staying warm and comfortable indoors. Windows are shut tight, furnaces run around the clock, and outdoor time is replaced with cozy evenings inside. But while winter may keep the cold at bay, it can also quietly compromise your indoor air quality (IAQ).
Cold temperatures and strong winter winds change how air moves in and out of your home. Reduced ventilation, combined with increased use of heating systems and everyday indoor activities, can allow airborne particles and pollutants to build up. Because we spend more time indoors during winter months, our exposure to these contaminants increases, making IAQ more important than ever.
Below are some common wintertime contributors to poor indoor air quality and practical steps you can take to reduce their impact.
Aerosol Products: Small Sprays, Big Impact
Aerosol products such as hair spray, deodorants, disinfectants, and cleaning sprays are widely used, especially during cold months when windows stay closed. When sprayed, these products release fine particles and volatile organic compounds (VOCs) that linger in the air.
Without proper ventilation, these contaminants can accumulate quickly, potentially causing irritation to the eyes, nose, and throat or triggering headaches and respiratory discomfort. Whenever possible, limit aerosol use, switch to pump sprays or wipes, and ventilate the area by using an exhaust fan or briefly opening a window.
Household Tools and Appliances
Common household tools can also affect winter IAQ more than you might expect. Hairdryers, curling irons, and other heated styling tools can release fine particles into the air, especially in smaller, enclosed bathrooms or bedrooms. Using these tools in well-ventilated spaces can help reduce buildup.
Vacuuming is another important consideration. Older or low-quality vacuums may stir up dust, pet hair, and allergens rather than capturing them. If your vacuum lacks strong suction or proper filtration, you may be redistributing particles throughout your home. Upgrading to a vacuum designed to trap fine dust and allergens can make a noticeable difference
Pets: More Time Inside, More Airborne Allergens
Winter weather often means pets spend more time indoors, increasing the presence of pet hair, dander, and allergens in the air. While our furry companions are family, they can significantly impact IAQ if not managed properly.
Regular grooming and bathing can reduce shedding, while consistent cleaning routines help prevent buildup. Vacuum carpets and upholstery frequently, sweep and mop hard floors, and pay special attention to corners, vents, and areas under furniture where hair and dander tend to collect.
Cooking Indoors During Cold Months
With outdoor grilling less appealing in winter, cooking moves almost entirely indoors. High-heat cooking methods such as frying, searing, or sautéing can release fine particles and fumes, especially when cooking oils and fats are involved.
Gas stoves can add another layer of concern, producing combustion byproducts if not properly ventilated. Always use your range hood or exhaust fan when cooking and ensure it vents air outside rather than recirculating it. Even cracking a window for a short time can help remove lingering pollutants.
Filtration: A Simple Step with Big Benefits
One of the most effective ways to improve indoor air quality during winter is through proper air filtration. Your HVAC system’s air filter plays a critical role in capturing dust, allergens, and other airborne particles before they circulate throughout your home.
If you’re using a low-efficiency filter, upgrading to a higher-efficiency option can significantly reduce airborne contaminants. Just as important is routine maintenance. Filters should typically be replaced every 90 days or sooner if you have pets, allergies, or high system usage during winter.
Breathe Easier All Winter Long
Winter doesn’t have to mean stale or polluted indoor air. By understanding how cold weather affects IAQ and taking small, proactive steps, such as improving ventilation, managing everyday activities, and maintaining proper filtration, you can create a healthier, more comfortable home environment.
Clean air matters year-round, but in winter, it’s especially important to pay attention. A few simple changes can help ensure the air you breathe indoors stays fresh, clean, and supportive of your well-being throughout the cold season.
Find the Right Filter for Your Home
At AAF, we make it easy to take that next step toward cleaner indoor air. Our NaturalAire® pleated air filters are designed to help capture the everyday particles that affect comfort and indoor air quality like dust, lint, pollen, pet dander, and more, so your HVAC system can deliver cleaner air throughout your home. When you’re ready to replace your filter, explore the full range of NaturalAire pleated filters and find the right MERV rating for your needs here: Residential Pleated Filters
