Choose anti-dust mite devices when the question fits its direct job: it target dust-mite allergen reservoirs using mattress and pillow encasements, humidity control, hot washing, high-efficiency vacuum containment, or other defined methods rather than directly treating asthma or allergy; allergen reducer devices instead reduce exposure to a defined allergen through filtration, cleaning, containment, humidity control, washing, or another device-specific pathway.
The word instead makes this a use-case decision, not a contest over secondary capabilities. A situation favors anti-dust mite devices when the required job is to target dust-mite allergen reservoirs using mattress and pillow encasements. A situation favors allergen reducer devices when the required job is to reduce exposure to a defined allergen through filtration.