You should change your furnace or air handler filter every one to three months during the summer, depending on the type of filter, your home’s air quality, and how often your HVAC system runs. Even when your furnace isn’t heating, the filter still traps dust, dirt, and allergens as your air conditioner circulates air. Neglecting it can reduce airflow, lower efficiency, and circulate pollutants throughout your home. This article explains how to identify your filter type, when to replace or clean it, and what household and climate factors influence how often you need to maintain it.
If you have a central air conditioning system, your furnace might not be in operation but the air filter is still doing its job trapping these particles in the summer months. The frequency of changing your furnace or air handler filter is dependent upon the type of air filter you’re using and several variables specific to your home.
So, how do you figure out how often you should change your filter during the summer?
- First, determine whether you have a disposable filter or one that can be washed. If yours is made of fiberglass matting, or a pleated paper filter, it’s disposable. If it’s made of plastic or metal or it reads “washable” or “reusable,” it can be cleaned and reinstalled.
- In general, furnace or air handler filters should be changed every month if the unit is run daily and every three months, if it’s only used intermittently.
- Consider climate conditions (i.e., in the southwestern regions of the U.S., air-born dust is more prevalent and therefore may clog the filter more frequently), the number of occupants in the home, the presence of pets, the frequency that windows are left open and other variables unique to your home. In general, the more pollutants in your home, the more frequently you should check the filter.
- Consult your furnace or air handler’s owner’s manual as well as the filter manufacturer packaging for additional recommendations.
Most people find disposable filters with cardboard frames most convenient in their homes. However, if you use reusable air filters, be sure to allow the filter time to dry completely before returning it to the furnace or air handler.
RepairClinic.com has replacement parts and maintenance products for heating and cooling products including furnaces, air handlers, air conditioners, central air conditioners, window and through-the-wall air conditioners and others.
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Have a great remainder of summer!
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