How Often Do You Need to Change the HVAC Filter
Air Conditioning Repair

How Often Do You Need to Change the HVAC Filter

By siteadmin on March 13, 2023

A furnace filter change is an essential home maintenance task. It improves the air quality, energy efficiency, and HVAC system performance. Due to the many factors that impact its service life, it can be challenging to estimate how often to replace the filter.

Furnace filters need to be changed every one to three months. For certain environments or people, it is better to change them more frequently.

Airborne Particles

Your HVAC filter should be replaced regularly to ensure its longevity and performance. Filters collect dust, pollen and other airborne particles that can block your unit's system.

You can improve your indoor air quality by replacing your HVAC filter. This is one of the most simple and cost-effective ways to protect yourself from viruses, bacteria, allergens and other harmful elements. You can also keep your furnace operating efficiently and lower your energy bills.

However, there are many factors that will affect the frequency of your HVAC filter replacements. It is important to consider factors such as whether pets are allowed, how often you use your HVAC system, and how many people you live with.


Allergens, substances that stimulate the immune system, release chemicals that cause symptoms like a runny or itchy nose, itchy eyes and coughing. Some allergy sufferers can experience asthma-like symptoms due to these chemicals.

Allergies are a very common problem that can affect anyone of any age. You get allergic reactions to pollen, pet fur, mold, food, or even insect stings.

Allergens may be very reactive to the immune systems, which can lead to life-threatening reactions in sensitive areas like eyes, noses, throats, lungs, and skin.

Allergens can take many forms. The most common types of allergens can be found in pollens, ragweed, and grass. Some are seasonal; they return every spring and summer for a brief respite.


Pets can make it easier to keep up with vacuuming, cleaning and dusting, but they also add strain to your HVAC system. Regularly changing furnace filters will ensure your system runs at peak performance and your indoor air quality is safe for you and family.

Your frequency for changing your air conditioner filters will depend on how often the system is used and how much debris has built up. The most frequent use of air conditioning filters is winter when heating systems work more frequently.

Pets can quickly clog up your air filter with their pet fur and dander. A filter for a single cat or dog in a home may need to be changed every two-months, but for households with multiple animals, they should be changed monthly.


Filters that get dirty or not responsive can clog the system, making it more difficult for air to flow through the vents. Therefore, it is recommended to change filters at least once per month.

The main purpose of filters is to catch dirt, dust and allergens from indoor air. Filters that become clogged with particles reduce efficiency, making your system run more often and increasing your energy bills. This can also lead to higher utility bills, which in turn will result in more expensive repairs.

Mold growth may be indicated by filters

An unhealthy air filter can indicate moisture in your HVAC system. This could be due to high indoor humidity or condensation. This moisture can lead to mold growth, which will spread throughout your home through the ventilation system.

Regular filter changes will improve indoor air quality and reduce your energy consumption. TemperaturePro offers a complimentary assessment of your HVAC system and a tailored HVAC maintenance program.


Hubbard Mechanical