Changing your filter is probably one of the easiest things you can do to maximize the life span of your furnace. By replacing your furnace air filter monthly, it doesn’t have to work as hard. When the furnace filter is dirty, it uses way more energy, thus you’ll see a spike in your energy bill.
In colder weather, we spend more time inside giving the air filters their most use. Pet hair, dander, smoke, and allergens stay in the home. The furnace air filter picks up most of the debris and they in turn clog filters at a higher rate. If you have a clogged air filter, air doesn’t flow freely into the furnace system, which makes the furnace work even harder.