The Dangers And Health Risks Of Having A Dirty Air Filter

Air filters are made of a material that can trap airborne particles such as dust, pollen, and other allergens. Over time the air filter becomes dirty by trapping these particles. When this happens, airflow is restricted, and clean air cannot circulate easily in your home or office space. This article discusses the dangers and health risks of having a dirty air filter.


Dust and pollen can cause respiratory problems

Dirty air filters cause respiratory problems because pollen and dust get trapped in them, which can lead to issues with some people. Air filters are one of the most important air treatments you have for your home because they absorb smells from pets or cigarettes as well as pollen. This is why they should be replaced quarterly in order to work as they should. Some air purifiers come with a feature called “timer” where it automatically tells you when it’s time for a new air filter so users don’t have to worry about changing them manually on their own accord!

Some air purifiers only last up to six months before needing replacements while others can even go up to two years without having any problems at all depending on how much you use it, but it’s still better to change them ahead of time.

Dirty filters can contribute to an increased risk of allergies and asthma attacks

Asthma attacks become more frequent in households where air filters are not changed regularly. When air is filtered through dirty air filtration systems, it can cause the increased presence of pollen and dust particles such as pet dander or debris. Individuals who already suffer from allergies will be especially sensitive to the contaminants in the air that have been passed through a dirty air filter system.

In addition, if you have an older model air conditioning unit that uses a disposable air filter made out of fiberglass mesh media, these types of filters should be replaced every month because they become less effective after just 30 days due to their inability to effectively trap smaller airborne pollutants. Fiberglass media tends to release microfibers into the air which could also trigger allergy symptoms for those with asthma or other respiratory conditions.

Airborne allergens are often found inside dirty filters

After some time, dirty filters start to contain airborne allergens. These are the ones that cause people to suffer an allergic reaction when they breathe air polluted by dust particles and pollen. Changing or at least cleaning them should be done regularly especially if you have a family member suffering from allergic reactions. You can ask a professional air conditioner service about what else to do.

Here’s the list of allergens that can be found:

  • dust mites
  • pollen
  • pet dander
  • fungi
  • air pollution particles

A dirty air filter will make your HVAC system work harder to cool or heat your home

Your HVAC system will stop working correctly if you don’t get air filters cleaned or replaced. This will cause your system to work harder than it has before. Every time air passes through dirty air filters, the dust gets trapped inside. Dirty air will be blown into your home and the evaporator coil can get damaged due to high-pressure drops caused by airflow obstruction from clogged up with dirt/dust particles. Your HVAC unit may vibrate abnormally when in operation because of this.

Dirty filters also increase the risk of fire hazards

Fire hazards will become more likely if air filters are not replaced. Filters can be clogged with dirt and debris, which reduces airflow to the furnace or air conditioner. This prevents these appliances from working efficiently because they cannot maintain a proper temperature in your home. When this happens, you will need to run them continuously until it cools back down which is wasting energy. This can also cause air quality issues.

So, if you want to keep the air in your home clean and reduce fire hazards, make sure to have air filters replaced every three months.

Damp air from a dirty filter will lead to mold growth in your home

Mold is a fungus that thrives on damp air and grows quickly in places where the air is trapped. According to the Environmental Protection Agency, mold can cause or exacerbate respiratory ailments such as asthma and allergies. It spreads quickly and can be found throughout homes and businesses, especially air ducts that haven’t been cleaned in a long time.


Air filters need to be cleaned and replaced before you’re told to do it on the box. That’s the safest way to ensure nobody will get sick from all the things that get stuck in them which can cause respiratory problems and allergic reactions. Aside from that, it will destroy the HVAC system and the risk of fire will increase along with a mold problem piling up in your vents. Be careful and change and clean them whenever you can!

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