{"id":24623,"date":"2026-01-12T11:45:15","date_gmt":"2026-01-12T16:45:15","guid":{"rendered":"https:\/\/blog.filtersfast.com\/blog\/?p=24623"},"modified":"2026-05-28T11:24:07","modified_gmt":"2026-05-28T15:24:07","slug":"replace-air-filters-in-winter-why-january-is-the-best-time","status":"publish","type":"post","link":"https:\/\/blog.filtersfast.com\/blog\/replace-air-filters-in-winter-why-january-is-the-best-time\/","title":{"rendered":"New Year, Cleaner Home: Why January is the Best Time To Replace Your Filters"},"content":{"rendered":"

January is in the middle of the winter months for the US. Cold weather forces many of us to spend more time indoors, as our furnaces work overtime to keep our homes warm. Our use of the heating system in winter increases energy bills and negatively impacts indoor air quality.<\/p>\n

January is a natural reset for most people, which is why many will set goals they want to accomplish throughout the year. Many people forget to include improving air quality and lowering energy bills in their New Year’s resolutions. However, prioritizing these can actually help you achieve your health and money-saving resolutions.<\/p>\n

\"woman<\/p>\n

Why winter is the hardest season on your air filter<\/h2>\n

When it’s cold outside, our heating system must run longer and more frequently to maintain the temperature we’ve set on our thermostat. Additionally, to prevent our homes from losing heat, we keep our windows and doors shut and sealed.<\/p>\n

January falls directly after the holidays. A time that is usually accompanied by setting out dusty decorations, inviting family and friends over for dinners and parties, and cooking up a storm. This stirs up a significant amount of dust, germs, oils, and allergens, which negatively impact your indoor air quality (IAQ).<\/p>\n

Think about it – your furnace will be working overtime, pumping warmed air into your home, and there’s more dust and debris than usual in the air. Your HVAC filter will capture more contaminants than usual, protecting the critical components of your furnace. However, out of sight and out of mind, it’s easy to forget to replace your filter on a regular basis.<\/p>\n

\"woman<\/p>\n

5 signs you need to replace your air filter after the holidays<\/h2>\n

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1.) Double the dust on surfaces and around air vents<\/h3>\n

If you feel like you’re having to dust more often or notice a lot of dust around registers and air vents, this could mean that your furnace filter isn’t capturing particles effectively.<\/p>\n

During the winter, your heating system operates more frequently and recirculates air continuously. After the holidays, filters are often overloaded because of increased foot traffic, decorations, pets, and packaging materials. Dirty filters allow dust to bypass the filter and settle more quickly around surfaces in your home.<\/p>\n

More dust is an early indicator that you need to replace your filter.<\/p>\n

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2.) Stale or musty smells when the heat is running<\/h3>\n

A lingering “stale” or “musty” odor after your heat cuts on can be a sign that your filter is overloaded with odors and particles.<\/p>\n

Frequent cooking, burning of candles, fireplace use, and keeping your windows closed can contribute to odor buildup. Once a filter is at capacity, it can no longer absorb or trap particles. This will cause smells to circulate throughout your home each time the heat runs.<\/p>\n

Odd odors are usually a sign that your filter is full and your airflow is being compromised.<\/p>\n

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3.) Aggravated allergies or respiratory issues<\/h3>\n

Are you or people in your home sneezing more? Experiencing a lot of congestion, waking up with a dry throat, or having more sinus issues? Your air filter could be to blame.<\/p>\n

In the winter, we tend to keep our windows shut to retain the warm air. However, this means that your indoor air is being recirculated repeatedly. If your filter is clogged, it will cause dust, pet dander, and even pollen to remain in the air longer, which can trigger allergy-like symptoms.<\/p>\n

Proper filtration helps reduce airborne irritants during peak indoor living months.<\/p>\n

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4.) Heat runs longer or louder<\/h3>\n

A clogged filter will restrict airflow. This will cause your HVAC system to work harder to pull air through the filter and will force it to run for longer. You may also notice that it’s noisier than usual.<\/p>\n

After the holidays, filters will become dirtier more quickly due to increased heating use and indoor activity.<\/p>\n

Restricted airflow reduces efficiency and increases heating costs.<\/p>\n

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5.) Your air filter looks dark or clogged<\/h3>\n

A visual inspection is the easiest way to determine if a replacement is needed. If your filter looks dark, gray, or you can see dust and debris, such as pet hair or dirt, it is likely that airflow is being restricted.<\/p>\n

Wintertime accelerates filter buildup, making January an ideal time to inspect your filter.<\/p>\n

Even if you change your filter on a schedule and it’s not time yet, a visibly dirty filter should be replaced immediately.<\/p>\n

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Can’t remember the last time you changed your furnace filter? It’s probably time.<\/em><\/p>\n

Order Furnace Air Filters<\/a><\/p>\n

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When should you change your air filter in winter?<\/h2>\n

Experts recommend replacing air filters every 30 to 90 days, depending on the type of filter. However, it is ideal to increase that frequency during the winter.<\/p>\n

When deciding how often to change your filter, here are a few questions you should consider:<\/p>\n