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How Often Should You Change Your Indoor Air Purifier Filter?

February 5th, 2021

Air purifier service
Air purifier service

Air purifiers improve the quality of air inside your home by trapping dirt, eliminating germs and neutralizing foul odours, smoke, and chemical fumes. They are especially beneficial for those who suffer from asthma and allergies. But what happens to those trapped particles over time?

The debris is stored in the filter, which highlights the importance of regular cleaning or replacing your air purifier filters. How often you should change your indoor air purifier filter depends on a number of factors that we list in this article.

Air purifier filters
Air purifier filters

Different Air Purifier Filter Types Require Different Replacement Schedules

Your air purifier will typically come with a manual that will tell you the recommended replacement schedule specific to the manufacturer. There are different types of air purifier filters and each type has its own advantages. Below is a list of common filter types and their recommended replacement frequency.

  • HEPA Filters – 12 to 18 months
  • Carbon Filters – 3 to 6 months
  • Pre-Filters – Cleaned every 30 days and replaced when worn out
  • Permanent Filters – Cleaned every 3 months and replaced when damaged

Other Telltale Signs To Watch For

The frequency in which you should replace your air purifier filter will also depend on the frequency of use, if you smoke or burn candles in your home, and if you have any pets. A filter with significant build-up will restrict performance and your air purifier won’t run as effectively.

Regardless of the recommended replacement schedule, it’s always best to replace your filter if you notice the following:

  • Your home is dustier than usual
  • You or other residents in your home are experiencing more asthma or allergy symptoms
  • An increase in odour
  • An increase in the amount of pet dander circulating

The Bottom Line

When an air purifier filter is packed with pollutants, it loses effectiveness and runs out of space for newly-trapped particles to go. Over time, the air quality of your home decreases. For an air purifier to run in its optimal state, regularly replacing your filter is a must.

If you’re unsure of the replacement schedule for the specific model of your air purifier or are concerned with its performance, always consult with a professional technician or schedule an air purifier service.

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