If you’re looking to replace your air conditioner filters, then you must be shocked to learn how many different air filter types are out there!
This discovery can be pretty overwhelming, especially if you’re new to the world of HVAC systems. But fret not! This guide covers everything there is to know about the different types of AC filters for your home.
The primary function of HVAC air filters is to remove harmful particles from the air as it flows through the system. This filtration ensures that your indoor air quality is up to the mark. Hence, they are an important component of your air conditioner.
To measure the efficiency of filters, experts use the Minimum Efficiency Reporting Value (MERV). MERV is a chart that rates filters based on their ability to capture particles. The rating ranges from 1 to 16, with 16 awarded to air filter types with the best filtering ability. The MERV ratings for different types of filters vary depending on their quality and manufacturer. It is always mentioned on the package.
That said, opting for the highest MERV rating isn’t always the wisest decision. These filters are costly and more filtering can lead to higher airflow resistance. This resistance causes strain on your HVAC unit and will lower its efficiency in the long run.
Most residential HVAC systems have a MERV 8 filter installed by default. Upgrading to the recommended MERV 13 rated filter will remove viruses along with other contaminants. Thus, leading to better indoor air quality. But as stated above, consult with an HVAC professional to see if your system can handle a MERV 13 filter or not.
The primary difference between air filter types is their ability to filter various air-borne pollutants present in your home. This ability depends on the type and layout of the materials used. For example, tightly woven, layered material will filter better than thinner material.
So, to choose the most suitable HVAC filter type for your home, you need to understand how well each type of filter material performs.
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There are seven basic types of AC filters, and each comes with its perks and cons. Here is a list of all the kinds with their respective MERV rating:
Also known as flat-paneled filters, these filters consist of strands of glass spun together and reinforced by a metal grate. The glass fibers are mostly fiberglass. These filters are one of the common HVAC air filter types because of how affordable they are.
Despite this popularity, these filters don’t do much for your indoor air quality. They can only filter about 20% of particles that are around 3.0 – 10.0 microns in size. Particles in this size only include dust, carpet fibers, and pollen.
Pleated filters consist of a fabric medium made of either polyester or cotton. The material gets arranged into folds to increase the surface area of the filter. Therefore, filters that have more pleats are more effective than those with fewer ones.
These filters are slightly more expensive than fiberglass filters. But they are also more effective against contaminants. They even capture smaller air pollutants such as pollen, pet dander, and mold spores. Pleated filters are available in both reusable and disposable versions.
High-efficiency particulate air (HEPA) filters are one of the most efficient HVAC filter types. They can remove up to 99.97% of the air-borne pollutants and allergens present in your home, including dust, mold, pollen, pet dander, viruses, smoke particles, and bacteria.
Due to the high efficiency of these filters, they are popular with people who have an air conditioner allergy or other respiratory problems. These filters are, however, more expensive than both fiberglass and pleated filters.
UV light filters kill bacteria and viruses with short-wave UV light. The germicidal radiation from the UV lamp in these filters disinfects air as it passes through. These are also great for ridding your space of harmful microorganisms such as mold spores.
Still, they do have some downsides. First, UV filters could potentially convert oxygen molecules into ozone molecules. In small amounts, ozone can have minor health concerns such as coughing and chest pain. In more significant amounts, it can make asthma and other respiratory diseases worse.
Secondly, while UV light filters do remove bacteria and viruses from the air, they do little against pollutants such as dust. As a result, these filters are generally part of a more advanced filtration mechanism like HEPA filters.
These filters create static electricity by using a mixture of cotton and paper fibers. This static then acts as a magnet and traps pollutants within the filter screen. Since this keeps allergens from spreading in your home, electrostatic filters are ideal for people who have allergies.
Electrostatic filters will often also have a carbon filter for improved efficiency. This sort of AC filter can be flat-paneled or pleated. They also come in both washable and disposable versions.
Washable HVAC air filter types are also available in flat paneled and pleated forms. They cost more than disposable filters do but will save you more in the long run. Also, they are more environmentally friendly than their disposable counterparts.
To clean these filters, you need to vacuum or rinse them to remove any dirt and impurities. It is essential still to ensure that the filters are fully dry before installing them again. Using damp filters can lead to mold and bacteria buildup, which will bring down your indoor air quality.
Media filters consist of a paper-like material folded into pleats inside a metal cabinet. While the filter is no wider than six inches, the pleated material can cover 75 square feet when unfolded. This increased surface area makes media filters seven times more effective than standard air filter types.
The high surface area also accounts for the extended lifespans of media filters. These filters can last up to 2 years, depending on the environment. Experts recommend that people in industrial zones or with weak immune systems opt for media filters over other types of AC filters.
There are several factors that you need to consider when choosing between the different AC filter types.
For example, people with allergies, asthma, or other pulmonary diseases, should get filters with a higher MERV rating. Also, if you have pets, live with smokers, or leave your doors and windows open often, a higher-rated filter would be better.
But people who don’t care much for superior air quality living in cleaner environments and only want to block out debris can buy lower-rated filters that are cheaper. Filters with very high MERV ratings are suitable for hospitals, smoking lounges, and care units for the sick.
Choosing between the different HVAC air filter types can be very confusing. The market is flooded with different types of AC filters with various functionality. So, it’s essential to keep your home requirements and MERV recommendations in mind.
For instance, if your home’s occupants have allergies, pick a filter with higher MERV ratings. But, since not all systems can handle these filters, it’s essential to check compatibility beforehand. Installing a filter with a MERV rating that’s too high will cause strain on your unit. An excess of which can lower your unit’s lifespan and long-term efficiency.
As a rule of thumb, it is recommended to clean your AC filters after every 250 hours of usage. While this cleaning is essential, it can often slip through your list of to-dos. We recommend using smart thermostats or smart AC controllers that send reminders when the next cleaning is due.
We hope now you won’t get confused by the many HVAC filter types and would be able to make a smarter choice for your system!
Indoor air quality is a crucial element for any homeowner, especially if members of your household have respiratory problems. Proper HVAC filters can make the difference between stuffy air filled with pollutants and clean air that’s healthy and easy to breathe. Understanding the different air filter types for homes is the first step to getting the improved indoor air quality you deserve.
There are seven commonly used home air filter types:
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Each of these filters has its own set of pros and cons, which vary based on your goal for your home. Some people need HVAC system filters that will keep the air free of allergens and other pollutants, while others just need a basic filter to get the job done. Generally, high-efficiency filters that are also cost-effective are best for homes, but other considerations should include whether there are pets in the home, whether mold or mildew is a threat and how often the filters should be changed.
The materials air filters are made of vary from fabrics to fiberglass. Filters are also rated using the Minimum Efficiency Reporting Value (MERV), which was developed by the American Society of Heating and Refrigerating and Air Conditioning Engineers (ASHRAE). The ratings range from 1 to 16 and give you an idea of how well the filter can trap pollutants that are as small as 0.3 microns and as large as 10 microns, with 16 being the most effective.
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Not all filters are built the same, so choosing the right filter depends on what you need to purify from the air. You’ll also want to consider factors like the cost of the filters. It’s wise to speak to an HVAC professional before making any decisions about air filters. To help gather information and weigh your options, you can compare the basic pros and cons of each filter type. Let’s take a look at each filter type and its characteristics to narrow down the types that may be a good fit for your home.
High-efficiency particulate air (HEPA) filters are recommended by the U.S. Department of Health because they are able to remove at least 99.97% of airborne allergens and pollutants — including mold spores and dust that are as small as 0.3 microns. With a MERV rating nearing 16, HEPA filters provide the highest protection for your home. They’re able to remove even the smallest microns or airborne particles, including tobacco and bacteria.
Those who live with allergies or other respiratory issues may benefit from HEPA filters the most. These filters do need to be adjusted by a contractor to fit your specific HVAC system.
As their name suggests, UV filters use short-wave ultraviolet light to kill bacteria and viruses. When air passes through the HVAC unit, the UV lamps disinfect it with germicidal radiation. UV filters are excellent for killing microorganisms that could be hazardous to your health, including mold spores.
One potential danger of UV filters is that they can transform oxygen into ozone, which can be hazardous for your health. Even low amounts of ozone can cause coughing and chest pain, while higher amounts of it can lead to worsening of existing respiratory diseases, like asthma.
Though UV filters are great at eliminating bacteria and viruses, they’re not as efficient when it comes to screening against pollutants like dust. This is why they are often part of a larger filtration mechanism, which includes HEPA air filters. The UV light is invisible to the human eye, and the lightbulbs generally need to be replaced every year, depending on the make and model of the HVAC system.
Using small cotton and paper fibers, electrostatic filters create static that acts as a magnet for dust and other airborne particles. The magnetism is strong enough that it keeps these particles from spreading throughout your home, making them one of the best choices for those who need a filter that can combat allergens.
An added bonus for electrostatic filters is they are available as disposable as well as reusable. When it comes time to change the filters, you can decide whether to wash and reuse them or toss them and get brand new ones.
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While certain types of air filters come with reusable and disposable options, washable filters are an environmentally friendly way to save money. The initial price of this air filter type for HVAC systems is high, but it should be viewed as an investment that will last for many years. The initial price is likely all you’ll have to pay as you can simply wash and reuse the filter over and over again instead of buying new ones every few months.
Washable filters need to be maintained well to ensure they work as they should. As one of the main types of air filters, they come with maintenance instructions that should be followed. It’s very important to make sure the filter is fully dry before putting it back in. Even the slightest bit of moisture left can lead to mold and mildew developing on the filter and being expelled into the air you breathe.
While these filters have a low MERV rating, they are a great long-term investment for someone who doesn’t have strong preferences about HVAC filter types and doesn’t need any specialty filters.
When it comes to air filters for HVAC systems, media filters can provide more benefits than standard filters with high MERV ratings. Media filters provide the same level of filtration as a high-MERV filter, but they do it without the negative consequences of airflow or static pressure. Instead, media filters have a greater surface area, which successfully prevents significant static pressure while providing better filtration.
Media filters are very easy to maintain and great for filtering bacteria and other small airborne pollutants. The filtered dirt is sealed into the filter, preventing it from being expelled back into your home. Media filters are also sturdy and cost-effective, needing to be changed as infrequently as once or twice a year.
Strands of fiberglass are spun together to create this type of filter, which is one of the most common types of HVAC filters. It makes for one of the best AC filter types because it is cost-effective, disposable and it protects air conditioners and furnaces from debris. Of the different types of AC filters available, spun glass is one of the most effective. But if you’re seeking an air purifier, a more high-tech option would be more suitable.
These filters aren’t known for improving air quality since they are unable to strain very much and can only trap some dust and allergens. For this reason, these filters aren’t recommended for people who have respiratory problems and need a filter that will improve the indoor air quality.
Polyester fabrics or cotton folds are two HVAC filter materials used in pleated filters. Pleated filters have a MERV rating between 5 and 13. While they can effectively filter dust and other airborne pollutants, they provide low air filtration and are less resistant to airflow.
The pleats in these filters give them an advantage over non-pleated options because they increase the filter’s surface area for better filtering. Filters with more pleats will provide better filtering than those with fewer pleats, trapping even difficult allergens and pollutants, like pet dander and mold spores. Pleated filters are also available in reusable and disposable formats, and they can help suppress the noise of the HVAC fan.
The downside to these filters is that they require your HVAC system to work a little harder to pull air through the unit, which may result in your HVAC system losing efficiency sooner than expected. Because pleated filters improve the air quality of your home slightly, they’re a reasonably-priced option for people who are concerned with indoor air quality.
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HVAC filter sizes are allotted by the filter’s thickness, also known as the depth, in addition to its height and length. There are standard sizes, but the exact filter size will depend on your HVAC system and its specifications. The best way to figure out what size filter you need is to remove the existing filter from your HVAC system and check for its dimensions on the filter frame. You can also refer to your HVAC system’s user manual to find the appropriate filter size.
Generally, filters will have a thickness of 1 inch for common systems and a thickness of 5 inches for larger HVAC systems. The overall size of the filter can vary from a height and length combination of 10 inches by 10 inches to 30 inches by 30 inches.
Some of the most common sizes are:
No filter is universal, so it’s important to make sure the filter you purchase is the correct size to fit in your HVAC system.
Indoor air quality is an important part of maintaining your health, and Home Climates is dedicated to offering over-the-top service for reasonable prices to ensure your home stays comfortable. If you want your air filter to stop viruses then we recommend the REME Halo air purifier, which reliably purifies the air in your home to make it healthy for you and your family.
At Home Climates, we provide everything from plumbing services to water treatment, and we service all brands of equipment. Because we want you to have the home you deserve, we offer many promotions and financing options for your home improvement projects.
We are dedicated to providing professional assistance that improves your indoor air quality. We even offer a five-year warranty on labor. You can get in touch with Home Climates 24/7 by calling 717-689-4151 or by making an appointment online. If you have questions about our services, our team of professionals will be happy to assist you today.
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