KNOKOO Middle Filter Oil Suction Filter For FES350PRO Laser Fume Extractor

1. Identifying When to Replace
To keep the device running efficiently, check the filter regularly for these signs:
（1）Dust Accumulation: If over 70% of the surface is covered with dust.
（2）Decreased Absorption: If odor removal weakens significantly, even after cleaning.
When these issues arise, replace the filter promptly to prevent performance decline or damage.

2. Suggested Replacement Interval
（1）Change the filter every 3-6 months, depending on air quality and usage conditions.
（2）Replacing the pre-filter regularly helps extend the lifespan of the main filter.
（3）Highly polluted environments may require more frequent changes—adjust accordingly for best results.

3. Maintenance Guidelines
（1）Use Genuine Filters: Always opt for original replacements to maintain filtration efficiency and extend device lifespan.
（2）Perform Regular Checks: Inspect the filter periodically to ensure it’s working effectively.
（3）Pre-Filter Maintenance: Clean or replace the pre-filter frequently, as it helps trap larger particles before they reach the main filter.