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How Often Should You Change Your Furnace Filter?

Maintenance Matters

furnace filter Suffolk County, MA The furnace filter is an essential component of your Suffolk County, MA’s home heating system. It not only ensures the efficient operation of your furnace but also improves the quality of your indoor air by trapping dust, pollen, and other airborne particles. But how often should you change it? The answer depends on several factors.

Type of Filter

The frequency of changing your furnace filter largely depends on the type of filter you use. Disposable fiberglass filters should be replaced approximately every 30 days, while pleated filters can last anywhere from 3 to 6 months. High-efficiency particulate air (HEPA) filters have a longer lifespan and can go up to a year without needing a replacement.


The more you use your furnace, the more often you’ll need to replace the filter. Because you live in a region with harsh winters where your heating system is constantly running, you may need to change your filter more frequently than someone who lives in a region where they only use their furnace occasionally.

Air Quality

If you live in an area with poor outdoor air quality or if someone in your household has allergies, you may need to change your filter more often to ensure the air in your home stays clean. Pets can also affect air quality, as they shed dander and hair that can clog up the filter.


Regular maintenance of your furnace can extend the life of your filter. This includes cleaning the area around your furnace to reduce the amount of dust and debris that can get sucked into the system. Scott Williams offers affordable, comprehensive service plans for oil-fired heating systems in Greater Boston.


While these guidelines provide a general idea, it’s always best to check the manufacturer’s recommendations for your specific furnace model. Regularly changing your South Shore home’s furnace filter is a small task that can have a big impact on the efficiency of your heating system and the quality of your indoor air. So, make it a habit to check your furnace filter regularly and change it as needed.

Trust Scott Williams

At Scott Williams, we repair, maintain, sell, and install furnaces in the Greater Boston area. So whatever your furnace needs are, we can help. And you can help avoid equipment breakdowns with a yearly maintenance visit. That’s why Scott Williams includes a thorough tune-up in all of our service plans. Avoid unexpected problems and save on labor and material costs for a variety of furnace repairs when you sign up for our Silver Platter Heating Oil Service Plan. It includes replacing the oil filter and the air filter.

With the Silver Platter heating oil service plan, we provide an annual 12-point tune-up. Here’s what we do:

  • Adjust electrodes (as needed)
  • Check draft
  • Clean oil burner
  • Inspect operation of controls and switches
  • Inspect pump strainer
  • Lubricate burner motor
  • Lubricate pumps and fan motors
  • Perform a combustion test
  • Replace air filter
  • Replace nozzle
  • Replace oil filter
  • Vacuum system and flue pipe

Contact Scott Williams today to schedule a maintenance or repair visit or to request a free estimate on a new furnace.