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Replacing Air Filters During Summer


Did you know hot weather plays a big role in how often you need to change your HVAC air filter? During the hot summer months, air conditioners are working overtime to keep us cool. When your home AC system is working harder, the air filter collects dust at a faster rate and thus affects how often it needs to be replaced.  Replacing air filters is important; we’ll help you learn all about air filters in your system and when to replace them!


To keep your home comfortable during the summer, chances are you have been using your air conditioner regularly. When your air conditioning system is running more often it is blowing more air through the air filter. When more air is moving through the filter, more dirt and other airborne particles such as dust, mites, pollen, and mold get drawn inside. Pollutants can impede the performance and efficiency of your air conditioner or be recirculated into your air supply – yuck!


When the air filter is dirty, it is not as effective at keeping air particles out. This can lead to many problems such as:

  • reduced indoor air quality
  • reduced air flow and added wear on your HVAC system
  • warm and cold spots due to reduced airflow
  • dirty coils and fans which can lead to a breakdown

In order to avoid running into these problems, check the air filter for dirt and grime, and replace air filters as necessary. Disposing of home air filters should always be done with caution, wrapping them in sealed trash bags as to not release particles into the air.


According to the Department of Energy, replacing a dirty, clogged filter with a clean one can lower your air conditioner’s energy consumption by 5 to 15%. Replace your air filters every 3 months, for maximum efficiency. During the cooling season, air filters need more frequent attention. Constant AC use may lead to replacing air filters every month or two. It is smart to check your AC filter often during summer especially if you have pets or if the air conditioner is subject to dusty conditions.


Bob’s Heating & Air Conditioning installs furnaces, air conditioners, and other systems that provide comfort and increase the indoor air quality in Western Washington homes. Purchase a replacement filter here. We offer air conditioning and gas furnace repair and maintenance by expert technicians dedicated to providing only the best service. Bob’s Heating & Air Conditioning proudly partners with organizations focused on sustainability and innovation, including Built Green, Energy Star, and Puget Sound Energy. 

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