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Furnace Air Filter Replacement Guide

The traditional home furnace works by pumping in air via your duct system and heating it up. The furnace heats the air temperature to match the number on your thermostat before redistributing it into the vents.

During this process the air coming into a furnace goes through the furnace filter before going to the blower fan. The furnace filter acts as a guard keeping outside contaminants out while keeping indoor air quality up. A furnace filter protects the home but over time they end up becoming too dirty or ineffective to properly work.

Why You Need to Replace the Furnace Air Filter

A furnace air filter is vital to a heating system’s ability to pump out air that is not contaminated with outside irritants or allergens. Clean air is especially important for homes that see residents or visitors that have issues breathing or allergies. You must also consider the additional costs that stack up as well.

The filter usually needs replacement after the amount of dirt and debris it has blocked has started disrupting airflow. When the airflow through a heating system becomes affected, then that leads to an increased electrical burden that shows up on your home’s monthly energy bill. A furnace air filter needs periodic replacement in order to avoid any complications.

How Often Should You Replace the Furnace Air Filter?

A furnace filter becomes dirtier or less effective as time goes on due to all the dirt and debris that it traps. The average filter usually lasts three to five months. The time frame varies depending on your home’s environment and the filter's effectiveness. You should plan a replacement schedule with the MERV rating in mind.

Furnace Air Filter MERV Rating

A filters MERV, or Minimum Efficiency Reporting Value, rating is the calculated value of its ability to block outside contaminants. The higher the MERV rating the smaller the particles a furnace air filter will be able to catch. Standard furnace air filters are able to block average dust and debris. Premium filters can prevent smoke, pet dander or ever bacteria from coming inside.

How to Replace the Furnace Air Filter

You can replace your furnace air filter by following a few, easy to follow steps:

Turn off the furnace, keeping it on during filter replacement is dangerous and could lead to injury.

Remove the filter carefully, the dirt and debris caked on could be re-released back into the air and cause problems.

You can then put the new filter in place. You need to be mindful of the arrow symbol on the filter that determines what direction it should be facing.

If you do not know what air filter size you need, then read the size off the old filter. The replacement furnace filter should have the same dimensions as the size printed on the cardboard.

For Washable Filters

A furnace filter with a plastic frame is a reusable and washable. You will be able to clean out the filter using a vacuum and water. A washable furnace filter can be cleaned using plain water or a mild detergent on either side of the filter. Rinse the filter out and shake off any excess water, repeat if detergent was used until none is left. A furnace filter can be dried out by either letting it air dry naturally, or by placing it back in place so that the airflow will dry it.

Have Your Furnace Filters Replaced Regularly 

Furnace filter maintenance needs to be done on a consistent schedule in order to prevent any complications with your home’s heating system. You may find that replacing your home’s furnace filter to be an annoying, and tedious. Our subscription service eliminates your issues with periodic filter delivery. We ship fresh, new replacement filters for your furnace straight to your home before the old filters can start becoming a problem.

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