How Often Should You Change Your 4-Inch Furnace Filter?

For optimal performance of your furnace system, it is essential to change your filter regularly. But how often should you change a 4-inch furnace filter? The answer depends on the thickness of the filter. For 1- to 2-inch filters, they should be changed every 1 to 3 months. For 3- to 4-inch filters, they should be changed every 6 to 9 months.

And for 5- to 6-inch filters, they should be changed every 9 to 12 months. Thomas Galbraith Heating, Cooling and Plumbing of Ohio recommends changing filters that are less than 2 inches thick every 30 to 90 days. If you have a pet, Service Experts Heating & Air Conditioning of Texas suggests changing filters 1 to 3 inches every two months. It is also important to note that thicker filters tend to last longer and provide more filtration, so they usually cost more than 1 or 2 inch filters.

How Often Should You Change Your 4-Inch Furnace Filter?

The general consensus among HVAC professionals is that you should replace your boiler filter every 90 days or every three months. However, this depends on the thickness of the filter.

Three- or 4-inch filters can last 6 to 9 months, and filters up to 6 inches thick can be replaced once a year. The furnace filter is used to clean the air of contaminants and dust just before air enters the furnace system. It is placed in a shared air controller where it cleans the air before diverting it to the air conditioning unit or oven. In addition to keeping the air conditioning system free of contaminants, boiler filters also help to clean the indoor air you breathe. Using a thicker filter than recommended can restrict the amount of air flowing through the system, causing too much strain and reducing efficiency. Larger homes have a larger volume of air circulating, so the filter may need to be changed more frequently.

Types of Filters

We also offer 5 inch oven filters (16x25x5 or 20x25x), whole house air filter brands, and rigid cell furnace filters.

So let's take a look at how often you should change your boiler filter to better protect your heating unit and provide clean indoor air to your home. According to Bob Vila, filters are designed to protect the oven from these particles, and improving air quality is nothing more than a beneficial side effect.