Summary and product recommendation
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To capture pollutants in your home and make your air healthier to breathe be sure to choose an air purifier that is powerful enough to drag all of the air in the room through the filter a minimum of 2.5 times an hour (ACH) for it to be genuinely effective. To get around 2.5 air changes per hour in your room measuring between 41 and 50 m2 you need an air purifier with a clean air delivery rate (CADR) in the range of 300-399 m3/h. CADR rating indicates how fast an air purifier can clean the air within a particular size room. It provides a way to compare air purifiers taking into account both airflow and a filter's efficiency.
An air purifier with a HEPA type (H10-12) filter is sufficient for regular air cleaning as it captures up to 95% of airborne particles greater than 0.3 microns. An air purifier with a True HEPA H13 filter can capture up to 99.97% of airborne particles greater than 0.3 microns.
Most common pollutants like pollen, mould spores, pet dander and dust range from about 100 microns down to around 0.3 microns and so are easily filtered out by a HEPA air purifier.
For a bedroom or baby room, you may want to use a quieter air purifier that comes with "night" mode. Air purifiers with "night" mode run quietly in the background allowing you to enjoy clean air while you sleep.
This tool is for guidance only and does not replace professional advice on product selection.