EN
GUANLIN G4 combination filter set, primary efficiency panel with matched holding frame and gaskets for AHU pre-filtration.
Complete G4 primary stage sets pairing the pleated panel with a matched holding frame and gaskets, eliminating the edge bypass that old distorted frames cause in AHU pre-filtration.
Description
G4 combination filter sets bundle the primary panel filter with its matching holding frame and gaskets, so a maintenance team can replace a complete stage instead of chasing individual components. Supplying the set together removes the most common installation fault in pre-filtration: a panel that does not seat squarely in an old, distorted frame and bypasses air around its edges.
Why Choose GUANLIN G4 Combination Sets
- Complete stage in one box — panel filter, holding frame and gaskets supplied together.
- No edge bypass — the frame is matched to the panel so the seal is uniform.
- G4 primary efficiency — captures coarse dust and lint to EN 779 G4.
- Fast changeout — the whole stage swaps in one operation.
- Standard and custom sizes — matched to your AHU opening.
- Extends downstream filter life — keeps medium and HEPA stages clean.
Application Scenarios
AHU and HVAC first stage
Replacing panel and frame together restores the seal that a distorted old frame can no longer provide.
Cleanroom pre-filtration
A complete matched stage protects terminal HEPA filters and stabilises cleanroom class.
Spray booth intake and exhaust
Overspray and lint are captured before the more expensive stages.
Pharmaceutical and food production
Hygienic changeout of the whole stage simplifies validation records.
Data centre air handling
Complete stage replacement keeps coil faces clean with minimal downtime.
Industrial make-up air units
Coarse dust control at low fan energy penalty.
Our Factory
GUANLIN has manufactured filtration products in Dongguan since 2003, operating a 6,000 m² plant with automated filter bag sewing lines, automated singeing equipment, cage welding systems and pleated filter production lines. Products are exported to Singapore, Vietnam, Malaysia and other markets, with ISO 9001 and ISO 14001 certified quality management.
Applicable Working Conditions
- Ambient air, non-condensing
- AHU, HVAC, cleanroom and spray booth pre-filtration
- Standard and custom frame sizes
Product Specifications
| Item | Specification |
| Set Contents | G4 panel filter + holding frame + gaskets |
| Efficiency | G4 (EN 779) |
| Media | Synthetic fibre pleated media |
| Frame | Galvanised or aluminium holding frame |
| Sizes | Standard and custom to AHU opening |
| MOQ | 20 sets |
FAQ
Q1. Why buy the frame with the filter?
Old frames distort and cause edge bypass; a matched set restores the seal.
Q2. What efficiency is G4?
Coarse primary efficiency to EN 779, typically 90% of synthetic dust.
Q3. Can you match my AHU opening?
Yes, any dimension to your drawing.
Q4. MOQ and lead time?
20 sets, 10–20 days.
Key Specifications
- Set: G4 panel + holding frame + gaskets
- Efficiency: G4 (EN 779)
- Sizes: standard and custom
- MOQ: 20 sets
