Types of Filters Used in Air Conditioners and Air Purifiers

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A filter is an integral part of any air-conditioner. It filters out dust particles. It is essential for the operation of the air conditioner.

Air will be blocked by the obstruction caused by the dust and debris on the filter. This will reduce the cooling efficiency and hinder the cooling process. This will have an impact on your electricity bill.

This unnecessary expense can be avoided by simply cleaning your air filter. You can also purchase a new filter if necessary.

It is best to change filters every 4 to 6 months. It also depends on how often you use the filters. It is important to remember that the most important thing in life is to make sure dust doesn’t accumulate.

Since the early 1990s, indoor air pollution has been on the rise. We spend on average 80% of our time indoors, so the chance of inhaling polluting air is greater.

Types of Filters Used in Air Conditioners and Air Purifiers

Types of filters in air-conditioner or purifier

 Electrostatic air filters 

The electrostatic charge can be used to remove dust particles from an electrostatic filter. The magnetic charge attracts debris and other particles. It will remain attracted by static charge even after it is released by washing or cleaning.

 Electrostatic air filter 

Electrostatic air filters offer many benefits.

  • Lifelong warranty
  • It is cost-effective
  • It reduces pollen and dust.
  • It’s easier to clean

However, it is important to clean the filter regularly. Consistent cleaning will ensure that the filter lasts many years. Daikin AC in India has an electrostatic filter.

 Nano Silver Filter 

Silver is known for its antibacterial properties, which is an interesting fact.

Nano Silver Example Unit: This unit is not the same model as ACs.

Nano Silver is an acronym for antibacterial technology. This technology is capable of disinfecting 650 types of bacteria, according to Samsung.

This amazing formula can destroy bacteria cells and chemical compounds. It is possible to use this formula in a number of ways. Exposure to ultraviolet light on titanium dioxide can also create electrons in an excited state.

It eventually reacts with Oxygen to produce superoxide ions. The hydroxyl radicals are then produced when it reacts with water vapor. Combining superoxide and hydroxyl ions is a deadly combination for killing bacteria.

 Pleated air filters 

This filter is durable and cost-effective. It is made up of pleats. The large surface area and higher fiber count can increase efficiency. It traps more particles and removes odors.


HD Filter with Antivirus Protection

The latest line of LG Dual Inverter ACs comes with an HD Filter, which offers anti-virus protection. Cationic Silver Ions are used to kill 99 percent of bacteria and viruses on contact with the filter mesh.

 HD Dust Filter for LG AC 

Samsung’s Full HD Filter (Full High-Density filter) works in a similar way. The Full HD filter can remove even the smallest dust particles due to its high filter density. The filter is resistant to water damage because of its antibacterial coating.

 HEPA Filter 

It stands for High-Efficiency Particulate Air Filter. This advanced technology was introduced during World War II. It was capable of removing radioactive particles from the atmosphere. This decreased the risk of soldiers suffering from respiratory disorders.


In today’s world, where pollution has increased, this technology is even more important. High levels of pollution are a result of high growth rates and economic prosperity in the developing world.

HEPA filter can remove 99.97% air particles. Even the smallest particles cannot escape this filter. This filter has been recommended by Doctors to patients with recurring allergies due to its efficiency and high success rate.

It can remove minute pollen, mold, tiny dust mites, debris, bacteria, and other allergens. The High-Efficiency Particulate Air Filter can also absorb cigarette smoke and odors. This filtration does not release any contaminants back into the atmosphere.

 Ultraviolet Light Air Filter 

Ultraviolet Light filters do more than just filter air. They can be a real destroyer. It uses UV light can be used to cause death enemy is, in this instance, bacteria. It kills bacteria, viruses, molds, and yeasts.

This filter is perfect for people who are frequently sick. This filter is useful in environments where cleanliness is essential. It can be used in hospitals to prevent infection and other diseases.

Ultraviolet light purifiers do not remove solid particles they remove dust, allergens, and other pollutants from the air. They are effective at removing chemical fumes, cigarette smoke, and bad odor.

 Carbon Adhesive filter 

An activated carbon filter can remove bad odors, chemicals, and gases from the air.

Activated carbons have tiny pores that can be used to remove pollutants. These purifiers can’t function by themselves. It can be used in conjunction with other filters.


It is common to believe that houses and rooms are free of pollutants and have no chemical content. The truth is that there are a lot of pollutants in the house and rooms.

Many organic chemicals are found in furniture and oil paints. It can be uncomfortable to have pet odor or moisture. These pollutants can be difficult to remove even with the best ventilation system.

Activated carbon is the best filter for chemicals. It is however not effective at eliminating dust particles, or other small particles and organisms.


It can also be called double filtering in an air purifier. It is basically a barrier or defense that stops larger particles from entering the main filter.

Prefilter is crucial in maintaining the life expectancy of the main filter. It significantly reduces the load on your internal filter.

 Air Purifiers use a pre-filter 

This increases the life expectancy of the main filter. It reduces the cost of any type of repair or replacement. It acts as an armor that absorbs large particles, dust, and pollen. It blocks hair furs, which eventually increases the filter’s capacity.

The prefilter can be used in one piece or attached directly to the carbon filter. It can not only improve the efficiency but it can also be washed and re-used.

 Catechin Filter 

Catechin, an anti-oxidant that belongs to the chemical class of flavonoids, is a good example. It is a natural remedy that has been used since ancient times.

Catechin Filter can fight viruses and eradicate bacteria. This filter can eliminate the bad odors of smoke and pollution. This filter can also remove bad odors from pets.

 Catechin filters 

It is also capable of eliminating microscopic bacterias and viruses. This undoubtedly improves your overall health and well-being. Catechin filters are known for their durability. The filter can last up to ten years if it is maintained properly and cleaned regularly.

 Vitamin C Filter 

It is a therapy as well as a filter. This filter’s name is enough to answer all questions. Vitamin C is an antioxidant that neutralizes free radicals in the skin.

Vitamin C can rejuvenate skin that is aging due to free radicals. This filter is a stress reliever after a hard day. It makes your skin soft and smoother.

 Anti-bacterial Filter 

This filter can kill bacteria in the air. It looks like a folded carton that resembles a mesh. This filter is an affront to microorganisms that are spread throughout the room.

This filter destroys Anti-Allergens as well as dust mites. This filter is available in one piece or together with a HEPA filter. Antibacterial filters kill germs and bacteria by using ultraviolet rays.

 Filter Anti-VOC 

VOC stands for Volatile Organic Compounds. VOC can be sensitizing to people around you.

You might feel nauseated or have headaches. These are common side effects. Carbon-containing compounds this is a common problem.

This could be due to chemicals in paints, pesticides, and new furnishings. These chemicals could have long-term or short-term effects on your health.


Poor ventilation can lead to indoor breathing problems. This increases your chances of being exposed to poisonous gases.

These poisonous gasses or vapors will remain in your home for longer periods of time because there is no escape route. It can eventually cause health problems. You might get a runny nose, or your eyes may start to water.

Anti-VOC filters are recommended for those with persistent symptoms. India’s Carrier Midea Model air conditioner has Anti-VOC filters. This AC can eliminate toxic VOCs. It can eliminate harmful gases and remove impurities.

 Filter PM 2.5 

This filter is for particles less than 2.5 micrometers. These particles are very small and can easily get into the lungs, causing health problems. This is a side effect of rapid industrialization and development.

The main cause is the burning of fossil fuels and the formation of smoke and dust in the atmosphere. In many ways, airborne particles can cause harm.

PM is a complex mixture of small particles and liquid droplets. These particles are so small that they can penetrate the bronchi and lungs.

Chronic bronchitis and sore throat can result from long-term exposure. These microparticles are captured by the PM2.5 filters. It is made of a Polytetrafluoroethylene membrane (PTFE), which reduces friction and wear.

 AC Filter – PM 2.5 

Nonstick pans can be coated with polytetrafluoroethylene. This Particulate can be captured by the membrane filter of polytetrafluoroethylene PTFE. It can be used as a reference for industrial hygiene and workplace safety.

The EPA test method uses a polytetrafluoroethylene membrane filtrate to measure air quality. PTFE, a flexible and soft material, has a pore size rating that is 2.0 microns.

The filter’s pore size rating is equivalent to its efficiency. In this instance, it can capture 2.0 micrometers.

 Photocatalytic Filter 

Photocatalysis is used to purify the air. This filter works by absorbing ultraviolet light onto titanium dioxide. This causes electrons to release. These electrons react with water molecules to create hydroxyl radicals (OH).

Photocatalytic Filter Illustration Only. This is not the exact model used in ACs

These hydroxyl radicals attack the enemy which is in this instance a pollutant. It neutralizes pollutants and renders them non-toxic.

This method is also known as photocatalytic oxygen (PCO). This method is safer and helps to eliminate air pollutants. It can eliminate many air irritants that can cause sore throat and lung infection. It can remove mold, bacteria, viruses, and other harmful substances.

 Rating Merv 

It stands for Minimum Efficiency Reporting Value. This rating is often used for refrigeration units.

It is used to assess the effectiveness of air filters. According to the American Society of Heating, Refrigerating and Air Conditioning Engineers, the minimum MERV rating is 6. The ideal rating is 16, which is sustainable.

The following parameters are used to determine the Minimum Efficiency Reporting Value.

  • You can catch big particles with a MERV of 1-4%
  • Large particles can be caught between 5-7 and 69 %.
  • 8-10 can remove 85% of large particles and approximately 50% of small dust.
  • 11-16 can eliminate more than 90% of large particles and 70 to 90% of small particles
  • The smallest particles can be absorbed by 17-20.

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