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HEPA air purifiers provide the ultimate levels of protection for your home, school or business – removing 99.7% of airborne particle matter.
HEPA filters are high-efficiency air purifiers that remove viruses, bacteria, mould spores, allergens, pollen, and dust mites from indoor spaces by trapping small harmful particles. They are a trusted standard for improving air quality.
HEPA is an acronym for ‘high efficieny particular air (filter)’. Air purifiers featuring a HEPA filter can theoretically remove 99.97% of all airborne particles to a minimum size of 0.3 microns. For context, 0.3 microns is 0.0003 millimetres!
HEPA filters are typically made from extremely fine strands of plastic or fibreglass woven together. The openings between these strands are less than 0.5 microns in size – large enough to allow air to pass through whilst capturing all airborne contaminants via direct impaction, diffusion and interception.
HEPA filtration can be incorporated into air purifiers with other types of filters including charcoal, UV filters, carbon and ionisation to provide maximum removal of and protection from microscopic allergen, smoke, bacteria, viral and other particles.
View our full air purifier range.
HEPA filters are made from a dense web of fibres, often composed of fibreglass or other similar materials. These fibres are arranged in a maze-like pattern, allowing air to pass through while trapping particles. The effectiveness of a HEPA filter lies in its ability to capture a wide range of particle sizes. Larger particles like dust and pollen are captured as they hit the fibres, while smaller particles are trapped through a process called diffusion, where they collide with gas molecules and are drawn into the fibres.
HEPA filters are especially effective at capturing ultra-fine particles, such as those that can carry bacteria and viruses. This makes HEPA air purifiers a crucial tool for maintaining a healthy home, particularly for people with respiratory conditions like asthma or for those living in areas with poor air quality due to pollution or wildfires.
For people with allergies, the presence of pollen, dust, pet dander, and other allergens in the air can be a constant source of discomfort. HEPA air purifiers are specifically designed to capture these allergens, reducing their presence in the air and helping to alleviate symptoms like sneezing, coughing, and itchy eyes. By trapping allergens before they can settle on surfaces or be inhaled, a HEPA air purifier can make a noticeable difference in your overall comfort.
Even if you don’t suffer from allergies, improving the quality of the air you breathe can have significant health benefits. HEPA air purifiers remove pollutants such as smoke, mould spores, and fine dust particles from the air, creating a cleaner and more pleasant environment. This is especially important in urban areas or regions affected by bushfires, where air quality can be compromised.
One of the most impressive features of HEPA filters is their ability to trap ultra-fine particles that other types of filters might miss. Particles as small as 0.3 microns are no match for a HEPA filter, which means that your purifier is capturing even the smallest pollutants, including some bacteria and viruses. This makes HEPA air purifiers a valuable tool for protecting your health, particularly during cold and flu season.
While HEPA filters are primarily designed to capture particles, many HEPA air purifiers also include additional filters, such as activated carbon filters, to help remove smells / odours. Whether you’re dealing with lingering cooking smells, pet odours, or smoke, a HEPA air purifier can help neutralise unpleasant scents, leaving your home smelling fresher and cleaner.
Modern HEPA air purifiers are designed to be energy efficient, meaning you can leave them running throughout the day without worrying about a spike in your electricity bill. Many models feature energy-saving modes that adjust the fan speed based on the air quality, ensuring that the purifier only works as hard as it needs to.
Any of the HEPA Air Purifiers featured at the top of this page will be suitable for any Australians wanting cleaner, fresher air in their home – however, with so many variables at play such as room size, existing air quality, the number of people in the room and more – it’s not possible to give a one size fits all recommendation. Here’s what we recommend you look out for when choosing between the HEPA air purifiers listed on this page.
When shopping for a HEPA air purifier, it’s important to consider a few key factors to ensure you choose the right model for your needs.
The size of the room where you plan to use the purifier is one of the most important considerations. Air purifiers are rated for specific room sizes, so be sure to choose one that is capable of handling the square meterage of your space. If you’re using the purifier in a large living room or open-plan area, you’ll need a more powerful model. For smaller bedrooms or home offices, a compact purifier will do the job.
If you suffer from allergies, asthma, or other respiratory conditions, you’ll want to choose a purifier that offers advanced filtration capabilities. Look for models with HEPA filters designed to capture allergens and other fine particles. Some models also feature additional filtration layers, such as antimicrobial filters or UV-C light, which can help eliminate bacteria and viruses.
Many modern HEPA air purifiers come with extra features that can enhance their functionality. For example, some models include air quality sensors that automatically adjust the purifier’s settings based on the current air quality. Others offer smart connectivity, allowing you to control the purifier remotely via a smartphone app. If you’re concerned about odours, look for a model with an activated carbon filter to help neutralise smells.
If you’re planning to use the air purifier in an office, bedroom or living room, it’s important to choose a model with a low noise level. Many air purifiers feature multiple fan speeds, allowing you to select a quieter setting for nighttime use. Be sure to check the decibel rating of the purifier before purchasing to ensure it won’t be too loud for your space.
Some concerns have been raised about possible shedding of microscopic fibres from HEPA air purifiers filters into the air that we breathe. However, an in-depth scientific study found that whilst a miniscule amount of particles can be shed from HEPA air purifier filters, this was at an amount 35 times less than the air we breathe everyday.
The lifespan of your HEPA filter will depend on a number of factors including usage amount and air pollution levels. Most manufacturers will provide recommended lifespans for their HEPA filters based on their own testing.
HEPA air purifiers have been shown to be effective in removing 99% of aerosols from a single room of a hospital ward within 5.5 minutes. Beyond respiratory aerosols and bacteria, HEPA air purifiers are also considered to be effective for the removal of dust, pollens, mould spores, smoke and other allergens.
Typically, mould spores are 3 to 40 mircons in size (0.003 to 0.04 millimetres) – HEPA air purifiers are effective in capturing particles down to 0.3 microns – meaning they are able to remove airborne mould spores.
HEPA air purifiers alone aren’t effective in removing odours, gases or chemicals from the air.