In general, this is how often changing furnace filters needs to be done: For 1- to 2-inch filters, replace them every 1 to 3 months. For 3- to 4-inch filters, replace them every 6 to 9 months. For 5- to 6-inch filters, replace them every 9 to 12 months.
What MERV rating should I use?
We do recommend that everyone uses filters that have at least an 8 MERV rating. These filters will remove the majority of pollutants from your indoor air. If you have serious medical conditions making it difficult to breathe, you might want to get a filter with MERV 9-12 rating.
What is HVAC filter program?
Air filter subscription services deliver HVAC filters to your door on a predetermined schedule. They eliminate the need to go to the store and find the correct filter for your home.Oct 22, 2021