China EN779 G4 Washable Panel Pre-Air Filter - Aluminum Frame Suppliers & Factory

The filter media is the part that actually performs the filtration. Common types include:

Metal Mesh

Characteristics: Typically aluminum or stainless steel mesh; washable, reusable, with good durability.

Used in situations requiring higher standards and reusable, but the cost is higher than that of paper media.

Synthetic Fiber

Characteristics: This is currently the most mainstream and common filter media. It is usually a non-woven fabric made from polyester fiber.

Advantages: The fibers are fluffy with uniform gaps, providing high dust-holding capacity; relatively low resistance; possesses a certain stiffness, allowing it to be self-supporting (used with a cross-sectional design, see the structure section below).

Form: The surface is usually pleated to create an uneven texture, increasing the filtration area and reducing resistance.

Glass Fiber

Characteristics: Now less commonly used in primary filters and more frequently used in medium-efficiency filters. It offers stable performance but is relatively brittle.

• 1
  Removal: Turn off the system and carefully remove the filter.
• 2
  Pre-cleaning: Use a vacuum cleaner to remove heavy surface dust from both sides of the filter media.
• 3
  Rinsing: Use a low-pressure water stream (e.g., from a shower head) to rinse from the clean side (usually the air intake side) towards the dirty side (air outlet side). Always follow this direction to prevent driving dirt deeper into the fibers. Keep the water stream gentle and perpendicular; do not rinse at an angle.
• 4
  Inspection & Drying: After rinsing, check for any remaining visible stains. If dirt is deeply embedded and difficult to wash out, it indicates the end of its usable life, and replacement should be considered. Thoroughly shake off excess water and let the filter dry completely in a cool, well-ventilated area. Never expose to direct sunlight or use heat to dry, as this can deform the frame.
• 5
  Re-installation: Ensure the filter is completely dry before reinstalling. Installing it damp can promote mold growth and damage the system.

• Cannot filter fine particles: Largely ineffective against PM2.5, smoke, bacteria, viruses, etc.
• Slight efficiency drop after cleaning: With repeated cleanings, some fiber structure may alter, leading to a slight reduction in filtration efficiency.
• Requires patient maintenance: The cleaning and lengthy drying process takes time.
• Not suitable for damp or oily environments: Oily particles will adhere to the media and cannot be washed out with water.