Purifying devices are equipped with super fine filter systems and react automatically to the degree of pollution if the unit has an integrated sensor. They remove pollutants such as household dust, mites, bacteria, germs, gas, but also all other particles that could potentially cause discomfort. Air purifiers also neutralise odours such as persistent cigarette smoke.

Originally, filter systems were used in the fields of aerospace, medicine, research and every place with special requirements for clean air. They delivered outstanding results and have been used in residential areas ever since. It does not take long before the effect of an air purifier becomes noticeable, users begin to feel better soon after setting the device up which shows you just how polluted the air surrounding us really is.

The "Clean Air Delivery Rate" CADR rating for dust, pollen and smoke refers to the cleaning capacity of the appliance. The three values are stated individually because these particles vary in size. This gives you the chance to compare units with each other. Find out more about the CADR rating in our guide.

Vornado:

The carbon filter for the Vornado air purifiers have a recommended replacement cycle of once a year because it traps odour, fine dust, hair, lint, etc., therefore its absorbing power decreases over the course of time. Essentially, it is the same principle as an old toothbrush: You could continue to use it but it just would not deliver good results. The activated carbon filters are budget-priced and exchanged within a matter of minutes – Try not to postpone the change unnecessarily.

Behind the activated carbon filter the Vornado True HEPA filter for the AC300 catches microscopic particles (0.3 µm and bigger) like mould spores and even bacteria. This filter is also replaced every year. Two individual displays give you information about the replacement of the HEPA and carbon filter.

Particle removal efficiency CADR: dust 152, pollen 170, smoke 142

Stadler Form:

The light-coloured prefilter of the Stadler Form Viktor air purifier protects the device against coarse particles and optimises functionality of the sensitive inner parts. This robust filter should be replaced every 6 months and can be cleaned with a hoover in between replacements.
 

The activated carbon filter cannot be cleaned or washed. Once it has reached its capacity limit it needs to be removed. Usually it is enough to replace it every 6 months. This filter comes with a little note to mark down the date for the replacement. We offer the original Viktor filters in our shop. If you notice that unpleasant odours are not absorbed sufficiently anymore, it might be necessary to replace the filter sooner than 6 months.

The HPP filter traps germs and bacteria. The manufacturer recommends washing the system every two months with cold water. After the specified drying time it can be put back into the device.

Each instruction manual will give you a detailed description of the replacement process. Replacing the filter is really easy and done within a matter of minutes.

The Stadler Form air washer Robert operates by using a different technique: The air is sucked into a water quench (“washed“) that contains ionic silver. The silver removes tiny particles and kills bacteria. The water is disposed of after every cleaning cycle.