When and How to Change Your Furnace Filter

December 01, 2015

Maintaining your furnace can help more than you’d think in the time in between furnace service appointments. One of the easiest, and essential, ways to care for your furnace is in replacing your furnace filter. Having a dirty air filter can contribute to a host of negative concerns for your heating and cooling system, its efficiency, and ultimately, how much your energy expenses are every month.

So what goes in to consideration 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 typically need to be changed every month and 3 inch filters should be changed every three months, dependent on the recommendations of the filter maker.
  • Home habits: if you have pets in your home, it might make sense to change your filter more often as a result of pet dander. If someone in your family has allergies or asthma, contemplate changing your home’s air filter more frequently to help with their symptoms.

Now you’re possibly wondering how to replace your furnace filter. Inevitably this will change depending on what furnace you have, but normally: 

  • Open or pull off 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 brackets.
  • 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 pull it out of the compartment.
  • When installing the new filter, inspect the perimeter of the filter for an arrow that shows you the air flow direction, to make sure you’re installing the filter in the proper direction. In the majority of cases, the arrow should point towards the main part (or top) of the furnace. 
At Teays Valley Service Experts Heating & Air Conditioning, we’ll change out 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 or schedule an appointment with us online.