Knowing when to replace your HEPA filter is crucial for maintaining clean, healthy air in your home or workspace. However, there is no one-size-fits-all answer - several factors affect the lifespan of a HEPA filter, including humidity levels, location of the filter, daily usage, air quality, and the level of filtration required.
As a general rule, HEPA filters should be replaced every 3 to 6 months. This timeframe is only a guideline, as performance depends heavily on the conditions in which the filter operates. If the air entering the HEPA unit contains high amounts of dust, allergens, or smoke, the filter will naturally reach its capacity faster.
Over time, your HEPA filter's efficiency decreases as it traps more and more airborne particles like dust, pollen, mould spores, and other pollutants. When the filter becomes saturated, it cannot clean the air as effectively.
For example, a HEPA filter operating at only 50% efficiency will take twice as long to purify the same space as a new, fully effective filter. This reduced performance directly impacts indoor air quality and may put more strain on your air purifier or HVAC system.
Regularly monitoring your filter’s condition is essential—especially if you notice reduced airflow, increased dust build-up, or more allergy symptoms. These signs indicate it may be time to replace the filter, even if it hasn’t yet reached the 3-month mark.
If you need help choosing the right replacement filter or setting up a maintenance schedule that works for you - contact our team for expert advice and support.