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Frequently Asked Questions

Below you will find some of the most common questions we receive from customers. If you have a question that you do not see listed, please do not hesitate to ask us here and we will post an answer as soon as possible!


What is an Air Purifier?

An air purifier is a device which removes impurities and contaminants from the air we breath. This would include things like dust, pollen, mold spores, allergens, smoke, chemicals, and odors. Air purifiers can be beneficial to anyone who wants to live or work in a healthier environment, and especially to people who suffer from allergies and conditions such as asthma and MCS.

What are VOC's?

The term VOC stands for volatile organic compound. A VOC is a chemical which easily evaporates into the air at room temperature and is noticeable to us as an odour. Many VOC's are known to be toxic, and we should limit our exposure to them as much as possible. The best defence against VOC's are specialized carbon filters which are available on many of our products.

What is a HEPA Filter?

A HEPA filter is a term which refers to a High Particulate Efficiency Air Filter. HEPA filters must meet strict standards and filter at least 99.97% of all particles 0.3 microns in size out of the air. Particles this size are about 300 times smaller than the diameter of a human hair, and up to 50 times smaller than we can see! HEPA filters are the best defences against particle pollution and are featured on most of our air purifiers.

Why is 0.3 microns used as a benchmark for HEPA efficiency?

Filter efficiency studies have shown that particles 0.3 microns in size are very close to what is known as the "Most Penetrating Particle Size (MPPS)" for HEPA filter media. Efficiency is typically greater than 99.97% against larger or smaller particle sizes. Particles larger than 0.3 microns are more easily trapped, or intercepted, by the media. Smaller particles often lack sufficient mass to penetrate the media.

Will a HEPA filter remove particles smaller then 0.3 microns?

Yes, not only do HEPA filters remove particles smaller then 0.3 microns, the filter efficiency generally increases as particle size gets smaller or larger then 0.3 microns.

Will a HEPA filter become less efficient after its been used for a while?

No, unlike electrostatically-charged air filters and other technologies that experience substantial loss of efficiency as they become dirty, HEPA filters generally become more efficient with use.

What is a Micron?

A micron is a unit of measurement commonly used to describe the size of airborne particles. One micron is equal to 1/25000 of an inch, and a human hair is typically 50-150 microns. True HEPA filters are 99.97% effective at removing particles 0.3 microns in size.

What is Activated Carbon?

Activated carbon is used in air filters for the absorption of chemicals, gases and odors. It is a form of charcoal which has been processed to open up millions of tiny microscopic pores in order to greatly increase its surface area. When certain chemicals come in contact with the carbons surface a small reaction takes place bonding them together. This causes the chemical to be trapped, or absorbed. This process happens over and over again until all of the carbons surface has been used up. Typically, 1 pound of carbon has a surface area of 125 acres.

Where should I place my AirFree Air Sterilizer?

Place your Airfree unit on a flat surface not exceeding 75 cm (3’) from the floor. Do not place it under furniture, shelves, or behind curtains as this will reduce the airflow and its efficiency at reducing microorganisms. Also try and avoid placing the Airfree unit near windows or doors as this could allow sterilized air to escape the room. It's best to use one Airfree air sterilizer per room, and leave it running 24 hours a day.

How does the Airfree air sterilizer destroy dust mites?

Mould reduction in the environment causes a reduction in the mould dependant dust mite population. Airfree units also destroy the harmful toxins and fungus freed into the air by dust mite feces and skeletons that trigger respiratory allergies and asthma.

Do your air purifiers have a trial period?

Currently we can only offer a trial period on air purifiers from Austin Air. This trial period is 30 days and only covers regular household use.