The types of filters used by air purifiers

Your air purifier most likely has two of these filters: a prefilter for big particles like pet hair and a primary filter for lesser pollutants.

The most common sort of maintenance required for air purifiers is the replacement of air filters. How frequently should you change them?

• HEPA Filters: Depending on usage, HEPA filters last roughly a year.
  
• Carbon Filters: Activated carbon filters typically have a lifespan of 6 months.
• Pre-filters: Pre-filters typically last three months, however, some are washable for long-term filtering.

Other types of air purifiers filter the air and remove bacteria and allergens by using heat or UV light. For your convenience, these models never require filter refills.