GUANLIN G4 filter combination set, staged pre-filter bundle for HVAC and spray booth air handling.

Staging filtration is not complicated, but it is easy to get wrong when the stages are bought separately from different suppliers. Efficiency mismatches, depth mismatches and pressure drop mismatches all show up as short filter life or fan overload. Supplying the stages as a set removes the guesswork — the combination has been selected to work together in the rack.

Why Choose GUANLIN G4 Combination Sets

1. Matched stages — efficiencies selected to complement.
2. Correct depth sequence — fits standard racks.
3. Balanced pressure drop — no fan overload.
4. Single supply — consistent frames and quality.
5. Simplified procurement — one order, one delivery.
6. Predictable performance — the combination is tested together.

Application Scenarios

Commercial HVAC
Staged air handling filtration.

Spray booth intake
Pre-filter ahead of ceiling filters.

Cleanroom pre-stages
Protecting medium and HEPA filters.

Industrial ventilation
Two-stage supply air cleaning.

Painting and coating lines
Staged air supply protection.

Building retrofit
Upgrading existing racks to staged filtration.

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. Can I choose different efficiencies?
Yes, the combination is configurable.

Q2. Are the stages sold separately?
Yes, but sets simplify correct staging.

Q3. What change interval?
Pre-filter monthly to quarterly; medium stage on pressure drop.

Q4. MOQ and lead time?
50 sets, 10–20 days.

• Configuration: G4 pre-filter + medium stage
• Efficiency: G4 primary
• Application: HVAC, spray booth
• MOQ: 50 sets