It is hard to know if an air purifier is working and cleaning your air effectively until you go to swap out your air purifiers filter and see how dirty it has gotten. Even at this point you will not be able to truly know how well your air purifier is working because all of the microscopic particles are too small to see. Some indications showing your air purifier is working are: less dust on your house contents such as on furniture, you’ll notice a ‘cleaner’ smell to your room air (particularly noticeable if you have an air purifier with an ionizer) and you’ll see a decrease in allergens around your home.

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