The frequency for changing your furnace filter can vary based on several factors. First of all, it depends on what filter is purchased. A good average replacement life is every 3 months for a good quality filter. Certainly, if you purchase the cheapest filter that only lasts 30 days, then you’ll need to increase the frequency of maintenance. But if a good quality filter is purchased, then you should be okay with 90 days. Here are some additional factors to consider when determining how often to check and change your heating system’s filter:
- Pets: If you have pets at home, then it’s probably a good idea to change your filter more often. Cats and dogs shed a lot of hair and that will flow to your heating system.
- Allergies: if anyone if your household has allergies, staying on top of changing your furnace filter is crucial. Frequent filter changes can help eliminate more allergens from flowing into the air in your home. Higher quality filters are also recommended if you have allergies.
- Older Homes: If you live in an older home, it may be more susceptible to dust and other particles. Your furnace filter may become dirty sooner than later in an older home.
- Smokers: Does your home contain smokers? If so, consider changing the filter more often.
If you notice that your filter looks dirty sooner than 3 months, consider changing it. It’s also important to pay attention to the recommendation from the furnace manufacturer as well as the actual filter that you purchased for replacement. There are many different kinds of filters providing different longevity based on the quality of the filter. And during the colder months your furnace will be running harder and more frequently so consider checking it more frequently to ensure optimal performance of your HVAC system.
