When and How to Change Your Furnace Filter

Maintaining your furnace can go a long way in the time in between furnace service appointments. One of the easiest, and essential, ways to maintain your furnace is in replacing your furnace filter. Having a clogged air filter could contribute to a number of unfavorable issues for your heating and cooling system, its efficiency, and ultimately, how much your energy costs are month after month.

So what goes in to determining 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 normally need to be replaced every month and 3 inch filters ought to be changed every three months, dependent on the recommendations of the filter maker.
• Home habits: if you have pets in your home, it could make sense to switch out your filter more often as a result of pet dander. If a family member suffers from allergies or asthma, consider changing your home’s air filter more regularly to help potentially decrease their symptoms.

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

• Open or pull off the air filter panel near the bottom of your furnace to expose an open compartment.
• On the top of that open compartment is where your furnace filter is resting on two metal lips.
• There will be a bit of space to move your filter back and forth that allows you to pull down one end of the filter and take it out of the compartment.
• When putting in the new filter, look at the perimeter of the filter for an arrow that shows you the air flow direction, to ensure you’re installing the filter in the proper direction. In nearly all cases, the arrow should point towards the main part (or top) of the furnace.