When and How to Change Your Furnace Filter

December 01, 2015

Taking care of your furnace can go a long way in the time in between furnace service appointments. One of the most basic, and critical, ways to care for your furnace is in changing your furnace filter. Having a dirty air filter could contribute to a host of negative issues for your heating and cooling system, its efficiency, and ultimately, how much your energy expenses are each month.

So what goes in to deciding when you should switch out 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 need to be changed every three months, dependent on the recommendations of the filter company.
  • Home habits: if you have pets in your home, it might make sense to switch out your filter more often as a result of pet dander. If you have someone in the house that deals with allergies or asthma, contemplate replacing your home’s air filter more frequently to help potentially decrease their symptoms.

Now you’re possibly wondering how to swap out your furnace filter. Obviously this will vary depending on what furnace you have, but usually: 

  • Open or take off the air filter panel close to the bottom of your furnace to expose an open compartment.
  • On the top of that open compartment is where you will find 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 bring down one end of the filter and remove it from the compartment.
  • When putting in the new filter, check the perimeter of the filter for an arrow that indicates the air flow direction, to make sure you’re installing the filter in the right direction. In the majority of cases, the arrow should point towards the main part (or top) of the furnace. 
At Golden Seal 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 set up an appointment with us online.