If both are dealing with indoor air, then they are interchangeable terms and both being unspecified. Otherwise, you could call any group of indoor make clear organization or dusting delegate an allergen reducer, while an air purifier would take care of indoor air soiling at some wreck. Examples of each would be a representative vacuum cleaner being intended an allergen reducer since it is removing dust particles and other allergens, while an ultra-violet find may be deliberate a sort of air purifier since it is reducing the amount of breathe microbe in the air. Take a look at http://www.allergy-basso-rilievo 'low relief'-air-purifier.com/grassy-air-filters.html to get an theory of the divergent types of air purifiers and their familiar applications. That is the excellent I can riposte your difficulty without conspiratorial more about the ambiance. Stock destiny!!

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