What are dust mites?
In one line: dust mites are microscopic bugs that live in bedding, carpets and soft furnishings and feed on shed skin flakes. Their droppings are one of the most common allergy triggers — and because that allergen mostly settles rather than floats, an air purifier helps but can't do the job alone.
What they are
Dust mites are tiny relatives of spiders, too small to see, thriving in warm, humid homes — especially mattresses, pillows, bedding, upholstery and carpet. They don't bite; the problem is their droppings and body fragments, which contain proteins many people are allergic to, causing sneezing, a runny or blocked nose, itchy eyes and worsened asthma.
Can an air purifier help?
Partly. The key thing: dust-mite allergen is relatively heavy, so it tends to settle into bedding and carpet and only becomes airborne briefly when you disturb it (making the bed, sitting down, vacuuming). A HEPA purifier captures that allergen while it's floating, which lowers what you breathe — most useful in the bedroom, running continuously. But it can't pull allergen out of the mattress itself.
What else to do
- Wash bedding hot (60°C) weekly to kill mites and remove allergen.
- Allergen-proof covers on mattress and pillows.
- Lower humidity — mites struggle below ~50% RH; ventilate, and a dehumidifier helps.
- Vacuum with a HEPA vacuum and reduce carpets/soft furnishings where you can.
- Run a HEPA purifier to catch what goes airborne (see do they help with dust).
Next step
Reducing airborne allergen in the bedroom? Browse HEPA units in the CleanAirKits store.
FAQ
Do air purifiers kill dust mites? No — they don't kill mites or remove allergen from bedding. They capture the allergen while it's airborne, which helps alongside hot washing, covers and lower humidity.
Where should I put a purifier for dust-mite allergy? The bedroom, running continuously — that's where you're exposed longest and where bedding disturbs allergen.