​​​​​​​​​Whole house air purifiers - FAQ

​Do you offer after-sales service?

Yes. Sanctuary Air provides phone assistance and on location service in SA and VIC. We also provide an annual filter change service for those who prefer not to change filters themselves. Phone assistance and advice is available Australia wide. We are dedicated to keep your system running.

Each system comes with a 3-year parts and labour warranty however, to date we have not had one purifier break down. This is because our purifiers are constructed from the most reliable components we could find anywhere, flagship components from the worlds most trusted manufacturers, so we don't expect any issues. The whole house air purifier is by design reliable and requires very little maintenance.

How do I know when to replace a filter?

Pre-filters should be replaced every 6 to 12 months depending on air quality in your location. In many cases the interval is 12 months. We can supply a box of low-cost pre-filters at the time of installation for DIY replacement. Alternatively we can come and do it for you. We recommend that the first filter change is done by us, this way we assess the rate of dust loading and determine the most economical filter replacement schedule going forward.

HEPA filters should be changed every 3 to 5 years. When we replace your first pre-filter we run a HEPA test to measure dust loading from which we can predict the most economical replacement interval for your location. We recommend HEPA replacement is done by us to ensure the filter is not damaged and that the seals are perfectly intact.

Where do I purchase replacement filters

Contact Sanctuary Air for all replacement filters.

There is also the option of purchasing from alternative suppliers because our purifiers accept off-the-shelf professional filters, available in most capital cities; Contact us for advice when purchasing from other suppliers.

What filters do your air purifiers use?

Sanctuary Air Purifiers use purely "mechanical" methods to remove air pollutants.  Mechanical filters are low in maintenance and are proven reliable, the reason they are used in critical air quality applications such as hospital operating theaters. With mechanical filters, air pollutants are physically captured and remain trapped in the filter.

We did research electronic filters and photo-catalytic converters as lower cost alternative methods. Electronic filters do need regular maintenance and due to the way they work, can deposit grime on walls and furnishings. Further, as these products do produce ozone and chemical by-products, they are inferior to mechanical filters. So we offer the "Rolls Royce" solution, a mechanical filter set; reliable, effective and low in maintenance.

A mechanical filter set consists of three parts

  1. Pre-filter to collect medium and coarse particles down to about 2 microns. It prolongs the life of the HEPA filter.
  2. Medical grade HEPA filter to capture fine and ultra-fine particles, removing harmful PM1 particles and any smoke.​ 
  3. Molecular filter containing broad spectrum activated carbon and other selected adsorbents to capture odours and hundreds of volatile organic compounds (VOCs). 

Sanctuary Air filters are large in size for low maintenance and to reduce ownership costs. Large filters are also energy efficient, providing electricity cost savings. For more information about our filters please link to our Replacement Filters page.

What is PM1?

PM1 refers to sub-micron particles, the most harmful particles of all - small enough to by-pass the defense of our lungs & alveoli, they can damage cardiovascular tissue and the inner walls of arteries. Once in our blood stream, PM1 can migrate into other organs including the heart and brain. PM1 is largely present in road traffic exhaust, and smoke from industrial processes, wood and tobacco. A genuine HEPA filter is necessary to efficiently capture PM1.

Why include outdoor air in the purifier's air intake?

Modern air tight buildings suffer from inadequate ventilation especially during calm weather. Stagnant indoor air is concentrated in synthetic chemicals and particles from carpets, glues, paints, cleaning fluids, sprays etc. and trapped moisture can lead to potentially lethal mould problems.

Air purifiers are very efficient at reducing airborne pollutants, such as fine particulates, VOCs and odours. On the other hand, air purifiers can not replenish Oxygen and can not remove trapped indoor moisture, exhaled CO2 or CO from gas appliances. A total clean air solution must include sufficient ventilation. There is no alternative.

How does cleaner air improve cognitive skills and increase productivity in study and work ?

Indoor air is polluted with hundreds of volatile organic compounds (VOCs) from construction materials, furnishings, office equipment, cleaning products, carpets etc. Indoor air is also polluted with excess CO2 and CO from human respiration and from indoor combustion, for example from gas appliances. It turns out that even at commonly experienced levels, VOCs and CO2 have a very significant affect on cognitive functions.

A 2015 double-blind study[1] measuring nine cognitive domains, found that people who work in offices with reduced levels of indoor VOCs and CO2 on average score double those who work in offices with typical pollutant levels. Crucially, participants scored 131%, 288% and 299% higher respectively in the key areas of crisis response, strategy and information usage. Usha Satish, professor, SUNY Upstate University states  "these are critical decision making parameters linked to optimal and productive functioning". Joseph Allen, assistant professor, director of the Healthy Buildings Program at the Harvard Center for Health and the Global Environment, states “These results suggest that even modest improvements to indoor environmental quality may have a profound impact on the decision-making performance of workers.”

The concentration of VOCs and CO2 does not have to be abnormally high; even modest levels affect our cognitive skills. Today, buildings with reduced VOCs and CO2 levels, known as High IEQ (Indoor Environment Quality) buildings are highly sought after and attract premium rent from business.

A good room air purifier with a large carbon filter can address VOCs in one room but if you want to address both VOCs and CO2 (and in every living space), you'll need a whole house air purifier with a ventilation intake.

Why do some salesmen claim whole house air purifiers don't work?

It's because they don't sell whole-house systems and they want you to buy their portable unit. The claim is complete nonsense and isn't supported by evidence. There is nothing better than a HEPA grade whole house air purifier - easily demonstrated with air quality measurements from a laser particle counter. ​​ 

What is the CADR rating system and why is it used to compare the performance of portable air purifiers and not whole house air purifiers?

CADR (Clean Air Delivery Rate) is a way of comparing the effectiveness of different air purifiers. It is determined by a standardised test that calculates the maximum room size in which a portable room air purifier (on maximum fan speed) can achieve 80% reduction of airborne particles. The 80% target requires the room air purifier to deliver the equivalent of 5 clean air changes per hour in that room size.​ The equivalent CADR of a portable air purifier is always less than the purifier's actual air delivery rate owing to the purifier's air flow pattern and filter quality. The CADR test doesn't apply to whole-house systems because:

1) Whole house systems have a more effective air flow pattern. In the case of portable purifiers, air flows in a shorter circuit because the inlet and outlet are in close proximity and within the same room; some already clean air is drawn back to the purifier before completely mixing with room air, meaning the purifier has to move more air to remove contaminants. In contrast, a ducted system has multiple outlets that are well separated from the air intake and are in separate rooms. Air is well mixed by time it reaches the air intake, meaning a ducted system will collect more contaminants per unit volume of air moved. 

2) Portable purifiers need to overcome a higher pollutant load per room due to airborne particles that infiltrate from adjacent rooms, whereas with a multi-room ducted system the adjacent rooms are also being cleaned, so the pollutant load to clean, per room, is reduced.

3) A whole house system has the option of adding ventilation air to the air intake. Doing so introduces positive pressure and a powerful performance boost.

4) Every Home is different.

In essence, a whole house purifier with a genuine medical grade HEPA filter will have distinct advantages over portable air purifiers, advantages that can be verified with laser particle counter measurements. Add ventilation to the purifier's air intake, and the resulting positive pressure takes air quality to a level that can only be achieved with a whole house ducted air purifier. 


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“We are very pleased with the air purifying systems and everything involved with the installation. Heart-felt thank you.” Steve & Lisa, Bordertown SA:

“There has been a massive improvement in Monty's health,  particularly his coughs and constant sneezing so it's a win all round!” Dan, Maidstone VIC :

''Since having our air purification system installed our house has a cleaner feel. The air is always fresh and there are no stale or mouldy smells. Most importantly, our son has ceased his incessant sneezing and coughing caused by allergies all together and we couldn't be happier about this. The system is discrete looking and silent too, a massive bonus! We are really pleased about the health benefits of this air purifier” Laura, VIC:

How to choose an air purifier

Indoor Air Pollution Fact Checks

​​Sanctuary Air SA-250 Series

A system that pays for itself...

Reduced cleaning time and cost, reduced usage and wear and tear on cleaning tools (e.g. vacuum cleaner), less damage to polished floors from dust abrasion, fewer sick days, save heating and cooling costs and much more - a Whole House Air Purifier from Sanctuary Air should be on the top of any home renovation and/or new home construction list. 

We spend 90% of our time indoors so clean indoor air is one of the best health investments we can make. 

For more information about our product, contact us using the contact information below. 

purely for your health

2) Ventilation

Ventilation is perhaps the single most important element in a healthy home. Ignore it and we risk serious health issues and costly mould problems. Poor ventilation can become dangerous when a home experiences negative pressure and the rooms adjacent to outdoor gas appliances draw in combustion CO. 

Air filters remove fine particles and odours, but the only way to remove CO from gas appliances, exhaled CO2, or excess dampness is with ventilation air. There is no alternative. A healthy home therefore must include sufficient ventilation. 

Our air purifiers include a ventilation air intake that you control, and the ventilation air is sourced from a location that avoids chimneys and flues.

Whole House Air Purifier Benefits...

  • solve smoke and dust problems
  • reduce cleaning time and cost
  • relieve asthma and allergy symptoms
  • move air from warm rooms to cold rooms
  • prevent damp and mould
  • cooling on summer nights
  • access free heat from your roof cavity during cold weather
  • improve sleep, health and cognitive skills [1]
  • reduce cardiovascular and respiratory health risks

Phone 03 8560 2111

The introduction of ventilation air into the whole house air purifier is highly advantageous because

  • Ventilation air can be supplied at the required rate for the number of people in your home
  • Ventilation air is cleaned before it enters, removing smoke, smog, dust and allergens. Far superior than cleaning ventilation air after it enters.
  • Positive pressure is generated indoors which helps prevent CO, dust, smoke and smog entering through cracks in door and window seals.

The result is truly outstanding indoor air quality and a home/office that requires less cleaning.​

​​The SANCTUARYAIR  difference

5 Reasons to choose a Whole House Air Purifier

3) Better Sleep 

Who doesn't want better sleep? With a whole house air purifier you finally get to block out noise by closing doors and windows. It won't cause stuffy air because clean ventilation air is quietly supplied all night. Of course you also breathe easy because the system replenishes oxygen, removes exhaled CO2, VOCs, and removes the microscopic dust clouds released from blankets.

How do I install a 

Whole House Air Purifier?

  1. Contact us to arrange a FREE in-house assessment and quote.  
  2. To proceed,  we set a date for our installers to visit at your convenience. It takes a single working day to install your system.
  3. Post installation, we verify your system's  effectiveness with a sub-micron laser particle counter.

(03) 8560 2111

for a FREE in-house assessment



 Phone    03 8560 2111

Manufacturer of premium quality ducted air purifiers

  Purely for health

5) Bonus Heat Transfer Options 

  • Access the free heat in your roof cavity during winter
  • Access cool night air during summer
  • Transfer heat from warm rooms to cold rooms
  • Connect to existing duct outlets or to new outlets
  • Duct to any room
  • Option to upgrade later
  • Operates independently

Three year parts & labour warranty


for more information and a free quote

​​Sanctuary Air SA-250 Series

Disclaimer    Copyright © Sanctuary Air Victoria 2015

Manufacturer of premium quality central air purifiers


4) Low Running Cost, 24/7 operation

​Many air purifiers have electricity and replacement filter costs that exceed the initial price of the unit in just 2 -3 years!  This is never the case with Sanctuary Air products.

When we combine a giant, long life medical grade HEPA filter with the most energy efficient fan and power supply we could find anywhere, the result is class leading energy efficiency. 

​Electricity cost, to serve your entire home, is less than that of a typical one-room portable purifier. 

   there's no better way to create a healthy home

​Indoor Air Pollution Fact Checks

Medical Grade HEPA

Made in Australia for Aussie Homes & Businesses
Low running cost        Low maintenance        ISO 9001        AS/NZS1668.2         AS/NZS 60335.1          RoHS Compliant         MEPS

How to choose an air purifier

1) Noise Free HEPA Grade Air Quality

HEPA filters capture more than 99.97% of airborne particles but to meaningfully improve room air quality, you'll need to turn up the purifier's fan speed and that will create a noise problem.

In contrast, whole house air purifiers are quiet, even on maximum speed because the fan is well separated from living spaces. With silent full speed operation you get the most from your air purifier and can expect a massive improvement in air quality - in every room - illustrated with laser particle counter measurements.