Filter Types
Paint booths use two main filter categories:
- Intake Filters: Clean incoming air to prevent contamination
- Exhaust Filters: Capture overspray before it enters ductwork
Each category includes multiple filter types with different characteristics.
Intake Filters
Common intake filter types:
- Polyester Ceiling Filters: Standard for downdraft booths. Various efficiencies available.
- Fiberglass Panels: Economical option for wall intake in crossdraft booths.
- HEPA Filters: Used in aerospace and other ultra-clean applications.
Higher efficiency filters capture more contamination but create more airflow resistance.
Exhaust Filters
Common exhaust filter types:
- Paint Arrestor: Fiberglass or synthetic media that captures wet overspray. The most common type.
- Cardboard Baffle: Economical option with lower efficiency.
- Multi-Stage: Multiple filter layers for higher efficiency and longer life.
Exhaust filters fill with paint and must be changed regularly.
Selection Criteria
Consider these factors when selecting filters:
- Efficiency: Higher efficiency = cleaner air but more resistance
- Capacity: Holding capacity affects change frequency
- Resistance: Initial and loaded pressure drop
- Cost: Balance initial cost vs. performance and life
- Fit: Must match your booth's filter frames
Filter Maintenance
Proper filter maintenance includes:
- Visual Inspection: Check filters weekly for loading and damage
- Pressure Monitoring: Track pressure drop to optimize change intervals
- Proper Installation: Ensure complete seal with no bypass
- Timely Changes: Don't let filters overload
- Documentation: Record changes for compliance
Track Filter Performance
Install pressure gauges before and after filter banks. Record readings weekly. You'll learn how quickly filters load in your operation and can predict optimal change intervals.