Based on the automatic double-door cargo shower room conditions you have been asking about, here is the most practical and industry-standard lifespan conclusion for you:
1. General usage environment (most factories)
Electronic, food, ordinary clean workshops, little dust
Used for 8 to 12 hours per day, normal maintenance
Efficient filter lifespan: 1 to 2 years
2. High dust, high usage frequency environment
Raw material workshop, packaging workshop, large dust, frequent transfer
24-hour operation or extremely high usage frequency
Lifespan: 6 to 12 months
3. Pharmaceutical / GMP sterile clean area
Strict compliance requirements, not just about whether it is blocked
Suggested lifespan: No more than 12 to 18 months for mandatory assessment and replacement
4. What truly determines whether to replace or not is not the time
As long as any of the following occurs, even if only used for 1 month, it should be replaced:
Pressure difference exceeds the initial pressure difference by more than 1.5 times
PAO leak detection or particle scanning shows leakage
The air outlet of the shower room has significantly reduced wind speed
Filter material is damaged, damp, or moldy
5. Remember in one sentence
Maintain well, less dust: 1 to 2 years
High dust, frequent use: Half a year to 1 year
Pharmaceutical GMP requires strictness: Must replace within a maximum of 1.5 years