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How Often Should I Replace My Air Filter?

What Affects Your Home Air Filter?

Air filters ensure our home’s air is free from harmful mold and other allergens. By collecting dirt and debris before they enter our home’s air duct system, air filters help us all breathe easier. When these filters collect enough debris, they can become clogged and in need of replacement. How do you know when it’s time to replace your home’s air filter? Let us help you decide.

Helpful guidelines to help you know when it’s time to replace your home’s air filter:

Filter Type

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One key indicator of your filter replacement timeline is the filter type. Fiberglass filters require replacement every 30 days, while heavier, pleated filters can last upwards of six months. To know how often a filter change is recommended based on type, look on the product packaging or consult the manufacturer.

Allergy Sufferers

If people in your home are prone to allergies, you may want to consider changing your filter more often. The more debris that builds up in a filter, the less effective that filter can become. Since filters help allergy sufferers by reducing the amount of mold and allergens floating throughout the home, making sure your filter is in top shape is key to keep allergies at bay.



We love our furry friends, but pet fur and dander can quickly clog up and shorten the lifespan of an air filter. Depending on the number of pets, breeds, and the amount of shedding, you may need to replace your filter more often than is recommended by the manufacturer.

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Small Children

When you have small children in your home, air quality is of the utmost importance. Reducing mold and dust through air filters can help reduce their chances of catching colds and other viruses. Provide your little ones with the cleanest air possible by checking and replacing your filter every 2-3 months.

System Use

An important indicator of filter change is system use. If your HVAC system runs often, you will need to stay up-to-date on filter changes. If your system runs intermittently or is turned off for a season, filter replacement may not be necessary for some time.

To ensure the best quality air in your home, inspecting your filter each month should become a part of your household routine.

Change Your Filter, Save Your HVAC System

No matter your circumstance, regular system maintenance is key to keeping your HVAC system in good working order. If not properly maintained, a home’s HVAC system can run into issues, resulting in reduced airflow and a shorter lifespan. On top of regular system maintenance, regularly changing the filter in your home heating and cooling system will ensure optimal indoor air quality and extend the life of your HVAC system.

Stay Up-To-Date on System Maintenance with ServiceMark!

Proper maintenance will ensure your system runs and lives up to its full potential. At Servicemark, we have service plans available to meet your system’s needs and help you stay up-to-date on required maintenance. When your HVAC system is in need, contact the experienced team at ServiceMark!

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