How Often To Change Furnace Filter With Pets. Smoking does a number on your home’s environment. A home with a single dog or cat should change the filter about twice as often.
Your furnace’s heater fan also determines the frequency of changing your air filter. The more pets living in your home, the less the filter will last. If you have a pet, it’s best to replace your filter more often.
So how often should you really change your filter?
A home with a single dog or cat should change the filter about twice as often. To determine if it’s too dirty, remove the filter and hold it up to the light. Also, depending on the seasons, you may need to change the filter at different intervals. If you have pets, change your filters more often.