The normal service life of paper-frame high-efficiency filters is mostly between 6 and 12 months. In reality, there will be significant differences depending on the dirtiness of the usage environment. Here is a practical and commonly used reference range for you:
1. General service life reference
Clean rooms, electronics factories, operating rooms, and pharmaceutical workshops have relatively clean environments and are protected by primary and intermediate filters → 6 to 12 months
Spray workshops, woodworking workshops, cement plants, garbage stations, etc., with large amounts of dust and heavy oil stains → 3 to 6 months, or even shorter
Office buildings, shopping malls, and ordinary central air conditioning environments have medium levels of dust → 9 to 12 months
Home / commercial air purifiers → 8 to 12 months
2. Criteria for determining when to replace (more accurate than time)
Generally, we do not strictly adhere to a fixed time. Look at these two points:
The final resistance reaches about twice the initial resistance (usually when it reaches 400 to 450 Pa, it must be replaced)
The air volume becomes significantly smaller, the air outlet is weak, or the cleanliness does not meet the standard
Paper-frame high-efficiency filters cannot be cleaned or reused. If clogged, it can only be replaced with a new one directly.
3. Key to extending the service life
The primary and intermediate filters must be equipped for protection
The primary filter is replaced every 1 to 3 months, and the intermediate filter every 3 to 6 months
Avoid high humidity, high temperature, and environments with water splashing, otherwise the paper frame will deform and leak air.