The Ultimate Guide To Air Filters Sizes: The Choice Is Yours!

There are many different reasons you may want air filters, whether it's for allergies, second-hand smoke, illnesses etc and because they come in many forms and types, knowing exactly which one to choose can be overwhelming.

Compiling a list of pros and cons, trawling the web for reviews, price comparisons and ratings doesn’t sound fun! Here we have done the hard part for you and aim to answer queries and simplify the process to get you the perfect air filter and air filter sizes for you!!

What Is An Air Filter And How Do They Work?

As the name suggests, air filters do just that, filter air. These works by in taking the air, passing it through a cleaning mechanism and simply pumping out the clean air.

This process, unlike water, does not use chemicals to cleanse the air but instead filters out the bad stuff! With people on average spending most of their time indoors and knowing pollution is typically two to five times higher than the outdoors it’s a wonder everyone doesn’t invest!

Whole-House-Filters are seen as the most efficient way to cleanse and purify air and are built into the ductwork of a forced-air heating or central air-conditioning system turning them into air vent filters and filtering the entire house.

These need to be professionally installed depending on your type of filter and comes in 4 different types.

Types Of Filters

Whole-House-Filters can be done in 4 different ways and, depending on your type of filter, will indicate what size filters you will need to replace them. To begin with, you will need to understand what different types of Air Filters there are.

Flat Filters are ready to go air conditioning and heating system which contributes to whole-house filtration through a thin filter vent. It is advised that this is replaced every 1-2 months to optimize its function and prevent blockage.

These can range from $20-$60.00, a great product with great air filter ratings and feedback is Filtrete Clean Living Basic Dust Filter available from Amazon and Amazon's best seller. This product is available in multiple sizes so you are bound to find the one you need!

Extended Media Filters are an improved version of the Flat Filters. By stacking the thin filters it provides more opportunity for dust and particles to be caught. Professional installation is required, costing about $600.00 however, as this option only needs replacing approx. once a year, costing around $50.00, you will find yourself saving money in the long run in comparison to other air filter prices!

Electronic Air Cleaning works by using an electrical charge to clean the air, this process follows a kind of sorting mechanism. The electrical current disrupts stagnant dust and particles making them become electrically charged and pass through a filter, being caught by a metal plate with the opposite charge. This must be professionally installed and costs approx. $600-$1000.00. Electronic air cleaners are likely the easiest to maintain, only requiring cleaning every 6-12 months with soapy water meaning there is no monthly/yearly expenditure needed.

Ultraviolet (UV) Air Cleaners target mold, fungus, bacteria etc. Ultraviolet air cleaners are often installed as additions to an electronic system. Extremely effective, this type is often used in hospital environments, which need rigorous contaminant filtration.

What Size Do I Need?

Now you know exactly what type of air filter you have or perhaps want, simply follow this link to see how to measure your filter, with this you will know what air filter sizes you require.

Alternative Options

Also available as portable devices, this is great for those of you who do not have central air conditioning or heating. Coming in as the cheaper option, they can cost anywhere from as low as $40.00.

A great product, with great reviews and feedback, is the GermGuardian. Amazon bestseller this is a fantastic alternative option.


There are numerous benefits to air filters, to mention just a few, allergies, respiratory problems, asthma, prevention of inhalation of second-hand smoke, the spreading of common colds and flu etc. With so many benefits and with the world becoming a more polluted environment it's no longer viewed as a luxury and instead is a necessity.


Now you have all the details and all the pros and cons laid out with comparison prices, finding the perfect air filter and air filter size for your needs should be a breeze. You can go forward knowing how your whole-house filtration system works and breath easily knowing the health benefits.

About the author

Nina T

Hi I'm Nina, a mother of one and proud contributor to Growing up I always enjoyed learning about my body and how I can live out a more healthy, wholesome and fulfilling life. I am super excited to be a contributor to as I can now channel my passions into helping educate others.

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