Types of AC Filters Commonly Used in Australia: A Comprehensive Guide
Published on : February 26th, 2025
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Air conditioner filters play a crucial role in keeping your indoor air clean and your cooling system running efficiently.
In Australia, where dust, pollen and seasonal allergens are common, choosing the right filter can make a big difference in your home’s air quality. The right filter helps trap dust, pet dander, and airborne particles, improving the air you breathe while protecting your AC unit from clogging and strain.
But with so many types available − fibreglass, pleated, HEPA, electrostatic and more − it’s important to understand their benefits and limitations. Whether you’re looking for budget-friendly options or high-efficiency filters for allergy relief, there’s one to suit every need.
In this guide, we’ll break down the most commonly used air conditioner filters in Australia and help you decide which one is best for your home.
Fibreglass Filters
Fibreglass filters are one of the most common and affordable air conditioner filters available in Australia. Made from layered fibreglass fibres, these filters are designed to trap large particles like dust and lint while allowing air to flow freely through your AC system.
One of the biggest advantages of fibreglass filters is their low cost, making them a budget-friendly option for homeowners. They are disposable and should typically be replaced every 30 days to maintain efficiency.
However, while they do a decent job of capturing larger debris, they aren’t the best at filtering out smaller pollutants like pollen, pet dander or bacteria.
These filters are ideal for homes that don’t require high levels of air filtration, but if you have allergies or respiratory concerns, you may want to consider a more advanced filter. Regular replacement is key to keeping your AC system running smoothly and efficiently.
Pleated Filters
Pleated filters are a popular choice for Australian homes because they offer better filtration than basic fibreglass filters. Made from polyester or cotton folds, their pleated design increases surface area, allowing them to trap more dust, dirt, and allergens.
They are available in various MERV (Minimum Efficiency Reporting Value) ratings, with higher ratings capturing finer particles like pollen, pet dander, and even mould spores.
One of the key advantages of pleated filters is their balance between affordability and performance. They last longer than fibreglass filters − typically up to three months − reducing the frequency of replacements. However, because they are denser, they can slightly restrict airflow if not properly matched to your air conditioning system.
Pleated filters are a great option for households with pets, allergy sufferers, or those looking for improved indoor air quality without the higher cost of HEPA filters. Regular maintenance ensures optimal performance and efficiency.
HEPA (High-Efficiency Particulate Air) Filters
HEPA filters are one of the most effective air conditioner filters available in Australia, offering superior air purification. These filters are designed to capture 99.97% of particles as small as 0.3 microns, making them ideal for households that need cleaner, healthier air.
Why Choose a HEPA Filter?
✔ Superior filtration – Traps dust, pollen, pet dander, mould spores and even bacteria.
✔ Great for allergy sufferers – Reduces airborne allergens, helping those with asthma or respiratory issues.
✔ Improves indoor air quality – Removes pollutants that can affect breathing and overall health.
Things to Consider
⚠ May reduce airflow – Their dense filtration material can restrict airflow in some AC units.
⚠ Not compatible with all systems – Check if your air conditioner supports HEPA filters.
⚠ Higher cost – More expensive than standard filters but offers superior air purification.
If air quality is a top priority, HEPA filters are an excellent investment for your home.
Electrostatic Filters
Electrostatic filters are a great option for homeowners looking for an efficient way to trap dust, allergens and airborne particles.
These filters use static electricity to attract and capture contaminants, making them more effective than basic fibreglass filters. They come in both disposable and washable versions, with the reusable type offering a cost-effective and eco-friendly solution.
One of the biggest advantages of electrostatic filters is their ability to capture smaller particles, including pollen, pet dander and smoke. This makes them a solid choice for allergy sufferers or pet owners. However, their effectiveness depends on regular cleaning − washable versions need to be rinsed and dried thoroughly every few weeks to maintain performance.
While electrostatic filters provide improved filtration, they may slightly restrict airflow in some air conditioning systems. If you’re considering one, check your AC unit’s compatibility to ensure efficient operation while keeping your indoor air clean and fresh.
Activated Carbon Filters
Activated carbon filters are a great option for improving indoor air quality, especially in homes dealing with strong odours or airborne chemicals.
These filters use a layer of activated carbon to absorb and neutralise pollutants rather than just trapping them like traditional filters.
Why Choose an Activated Carbon Filter?
✔ Removes odours – Effectively eliminates smells from pets, cooking, smoke, and chemicals.
✔ Filters harmful gases – Absorbs volatile organic compounds (VOCs) from cleaning products and paints.
✔ Works well with other filters – Often used alongside HEPA or pleated filters for enhanced air purification.
Things to Consider
⚠ Doesn’t trap dust or allergens well – Works best when paired with another filter type.
⚠ Needs regular replacement – Carbon becomes saturated over time and loses effectiveness.
⚠ Higher cost – More expensive than basic fibreglass or pleated filters.
If you want fresher, cleaner indoor air, an activated carbon filter is a smart choice.
UV Light Filters
UV light filters are a high-tech solution for improving indoor air quality by targeting airborne bacteria, viruses and mould.
Unlike traditional filters that trap particles, these filters use ultraviolet (UV) light to neutralise harmful microorganisms, making them an excellent option for homes concerned about germs and allergens.
Why Choose a UV Light Filter?
✔ Kills bacteria and viruses – Helps reduce airborne pathogens for a healthier home.
✔ Prevents mould growth – Stops mould and mildew from building up inside your AC system.
✔ Improves air quality – Works alongside HEPA or pleated filters to enhance filtration.
Things to Consider
⚠ Doesn’t remove dust or allergens – Works best when paired with a traditional filter.
⚠ Requires professional installation – Needs to be correctly placed within the AC system.
⚠ Higher cost – More expensive upfront but offers long-term health benefits.
For those wanting a cleaner, germ-free home, UV light filters are a fantastic addition.
Washable & Reusable Filters
Washable and reusable filters are a cost-effective and eco-friendly option for Australian homeowners. Unlike disposable filters, these can be cleaned and reused multiple times, reducing waste and saving money in the long run.
Why Choose a Washable & Reusable Filter?
✔ Budget-friendly – A one-time purchase that lasts for years with proper maintenance.
✔ Eco-conscious choice – Reduces landfill waste by eliminating the need for frequent replacements.
✔ Good for basic filtration – Captures dust, lint, and larger particles to protect your AC system.
Things to Consider
⚠ Needs regular cleaning – Must be washed every few weeks to maintain efficiency.
⚠ Not the best for allergies – Less effective at trapping fine particles like pollen and pet dander.
⚠ May impact airflow – If not cleaned properly, dirt buildup can restrict airflow and strain your AC unit.
If you’re looking for a low-maintenance, reusable option, washable filters could be a great fit.
Breathe Cleaner Air
Choosing the right air conditioner filter is key to maintaining clean indoor air and keeping your AC system running efficiently. With so many options available – fibreglass, pleated, HEPA, electrostatic, activated carbon, UV light and washable filters – it’s important to consider your specific needs.
If you’re looking for a budget-friendly option, fibreglass filters are a good start, while pleated filters offer better dust and allergen control. HEPA and activated carbon filters are ideal for those who want the highest level of air purification, especially for allergies or odours.
UV light filters add an extra layer of protection by neutralising bacteria and viruses, while washable filters provide a reusable, eco-friendly solution.
Regular filter maintenance and timely replacements will keep your air conditioner working efficiently. By choosing the right filter, you can enjoy cleaner, healthier air in your home all year round.
Please note: This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.
Do you have any questions about AC filters?
Frequently asked questions about AC filters
It depends on the type of filter and your household conditions. Basic fibreglass filters should be replaced every 30 days, while pleated filters can last up to three months. If you have pets, allergies or live in a dusty area, you may need to change filters more frequently. Washable filters should be cleaned every two to four weeks for the best performance.
If you suffer from allergies, a HEPA filter is the best choice because it captures 99.97% of allergens, including pollen, pet dander, and dust mites. Electrostatic filters and pleated filters with high MERV ratings are also good options. For added protection, activated carbon filters help remove allergens and odours from the air.
Yes, it can. A clogged filter restricts airflow, making your AC work harder, which can increase energy bills and lead to system breakdowns. Dirty filters can also reduce indoor air quality, causing dust buildup and potential respiratory issues. Replacing or cleaning your filter regularly keeps your AC running efficiently and your air clean.
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