How often should the HVAC filter be changed?
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How often should the HVAC filter be changed?

By siteadmin on March 10, 2023

It is essential to maintain your home's HVAC system, improve air quality and energy efficiency by changing furnace filters. It can be difficult to estimate how often the filter should be changed due to many factors that influence its service life.

Furnace filters should be replaced approximately every one to two weeks, but for some homes and certain people it may need to be replaced more often.

Airborne Particles

It is important to replace your HVAC filter regularly for long-lasting performance. Filters trap dust, pollen, and other particles that can clog your HVAC system.

It is the easiest and most cost-effective way to improve indoor air quality. It also helps to keep your furnace running efficiently and decreases energy bills.

There are many factors that influence how often your HVAC filter needs to be changed. This decision should be made taking into account your household size, pets and frequency of use.


Allergens are substances which activate the immune system and release chemicals that can cause symptoms such as a runny nose or itchy eyes. These chemicals can also cause asthma-like symptoms in allergy sufferers.

Allergies can be a serious health problem that affects people of all ages. These allergies occur when your body is hypersensitive to certain substances such as pollen, pet hair, certain foods, mold, and even insect bites.

Allergic reactions can cause severe, potentially fatal allergic reactions to the immune system.

There are many types of allergens, including proteins. Most allergens are found in grass, pollen, and ragweed. Many of these are seasonal and return each spring or summer to provide a short respite.


Pets make it easier to clean, dust, and vacuum, but they can also cause additional strain on your HVAC system. Regular furnace filter replacements will ensure your HVAC system is running at its best and indoor air quality for your family.

The frequency of your air conditioner filter replacement depends on how often you use it and how much debris is built up. High usage times, such as winter, when heating systems are used more often, can make filters dirtier.

Pets can quickly clog your air filters with their fur and dander. For households with more than one animal, it is recommended that the filter be replaced every two months.


Filters that are not responsive or dirty can cause a blockage in your system, making it harder to push air through the vents. It is recommended that you change them at least once per month for best performance.

The primary function of filters is to capture dirt, dust, and allergens so they don't get into your HVAC system. This can compromise indoor air quality. Filters that are clogged with particles can reduce efficiency and cause your HVAC system to run more often, which will increase energy bills and ultimately cost you more.

Filters may indicate mold growth

High indoor humidity levels or condensation could cause a dusty filter to appear in your HVAC system. This moisture can encourage mold growth and spread throughout the home via your ventilation system.

Regular filter replacements can improve indoor air quality, and save you money on your energy bills. Hubbard Mechancial can help you determine when your HVAC system needs to be replaced.

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