When and How to Change Your Furnace Filter

December 01, 2015

Maintaining your furnace can help quite a bit in the time in between furnace service appointments. One of the simplest, and crucial, ways to care for your furnace is in changing your furnace filter. Having a filthy air filter can contribute to a host of negative issues for your heating and cooling system, its efficiency, and ultimately, how much your energy expenses are every month.

So what goes in to deciding when you should replace your furnace filter?

  • Type of filter: the two most common filter sizes are 1 inch and 3 inch filters. 1 inch filters usually need to be changed every month and 3 inch filters should be swapped out every three months, based on the recommendations of the filter company.
  • Home habits: if you have pets in your home, it could make sense to change your filter more often due to pet dander. If you have someone in the house that deals with allergies or asthma, think about replacing your home’s air filter more regularly to help potentially decrease their symptoms.

Now you’re likely wondering how to replace your furnace filter. Obviously this will differ depending on what furnace you have, but usually: 

  • Open or remove the air filter panel close to the bottom of your furnace to uncover an open compartment.
  • On the top of that open compartment is where you’ll see your furnace filter resting on two metal lips.
  • There will be a small amount of space to move your filter back and forth that allows you to pull down one end of the filter and remove it from the compartment.
  • When installing the new filter, check the perimeter of the filter for an arrow that specifies the air flow direction, to ensure you’re installing the filter in the correct direction. In most cases, the arrow should point at the main part (or top) of the furnace. 
At Service Experts Heating & Air Conditioning, we’ll replace standard one-inch furnace filters as part of our regular furnace service Precision Tune-up or PLUS Maintenance Agreement service. Give us a call today at 305-440-1505 or arrange an appointment with us online.