GUANLIN primary paper frame filter, G3 G4 pleated panel for HVAC pre-filtration and equipment protection.

The cheapest filter in the building is the one that saves the most money. A G3/G4 primary panel catches the coarse dust that would otherwise load the coil, the medium efficiency stage and the HEPA filter behind it. Every kilogram of dust it holds is a kilogram that does not shorten the life of a filter costing ten times as much.

Why Choose GUANLIN Primary Paper Frame Filters

1. G3 / G4 efficiency — correct coarse dust capture.
2. High dust holding — long service intervals.
3. Low pressure drop — minimal fan energy penalty.
4. Light weight — easy single-person changeout.
5. Standard sizes — fits existing filter racks.
6. Disposable — simple, clean replacement.

Application Scenarios

HVAC air handling units
First stage protection for coils.

Cleanroom pre-filtration
Protecting medium and HEPA stages.

Industrial ventilation
Coarse dust removal from supply air.

Spray booth intake
Pre-filtration ahead of fine stages.

Data centre cooling
Coil and server protection.

General building ventilation
Basic air cleaning.

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.

Product Specifications

FAQ

Q1. How often should it be changed?
Typically monthly to quarterly depending on dust load.

Q2. Can it be washed?
Not recommended; it is a disposable panel.

Q3. Are custom sizes available?
Yes, produced to your dimensions.

Q4. MOQ and lead time?
100 pcs, 10–20 days.

• Efficiency: G3 / G4
• Frame: cardboard paper frame
• Media: pleated synthetic
• MOQ: 100 pcs