• Janice Yarbrough

The Danger of Dirty Furnace Filters

Dirty Furnace Filters

Lately, there has been a lot of talk about Indoor Air Quality. At  Fahrenheit Mechanical Systems, we’re glad to hear it. Why? Poor indoor air quality can be very dangerous for the occupants of a home or building. Fortunately, there is much that can be done to restore or establish clean, fresh, healthy air within a space. In fact, one most effective things you can do is also happens to be one of the simplest: replace the furnace air filter.

Harmful contaminants

It might surprise you to learn just how dangerous clogged, forgotten filters inside your furnace can become. Within the airborne particles inside your home are many potentially harmful contaminants like dust and dust mites, molds and mildew, bacteria, pollens, allergens, and particulates that carry germs, viruses, and such. That’s why the air filter in your furnace exists; to protect you and your family from these airborne contaminants. Working as intended, they pull the contaminants from the atmosphere in your home and prevent them from circulating freely.


When neglected, a filter becomes so packed with contaminants it can no longer function effectively, leaving you vulnerable to those highly irritating allergens, contagions like influenza and the common cold, and so on. Instead, it begins to reintroduce them into the environment, which in turn, becomes more and more contaminated as time goes by.

Make the change

As we mentioned near the beginning, the simple act of changing the air filter of your furnace will have a remarkable, immediate impact on the air quality within your home. While you’re at it, take a look at the condition of your furnace. Are there deposits of dust, grime, or other substances building up? If so, take care of them while you’re changing the filter. Make it a habitual part of your routine.

Thorough furnace cleaning and maintenance

Keeping the furnace free and clear of dust and other substances will boost its efficiency, and help keep symptoms and contaminant irritation levels within your home to a minimum. Does the level of dust and grime on your furnace call for professional help? Fahrenheit Mechanical Systems can help. Thorough furnace cleaning and maintenance is another important tool in keeping your home, family, and furnace from being negatively affected this heating season.

Once a month during peak usage

Remember, the winter heating season runs hand in hand with cold and flu season. So why not put yourself on a schedule? Set a calendar alarm. Commit to changing the furnace filter at least once a month during peak usage seasons (winter & summer), and twice a month if chronic allergy sufferers or those prone to frequent illness are present. While the 3-month rule is the accepted standard for filter rotation in many places, you will never regret being extra vigilant in protecting your family during cold and flu season.

Fahrenheit Mechanical Systems

At Fahrenheit, we specialize in Commercial and Residential HVAC and Refrigeration installation and service. If your Middle Tennessee furnace is in need of maintenance, don’t delay. Call Fahrenheit Mechanical Systems today at (615) 392-1381. We also offer 24/7 emergency service for all your commercial and residential HVAC emergencies.

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