Three-quarter view of a medium-efficiency pleated panel air filter

Air Filters and Chemical Filtration

Medium-Efficiency Pleated Panel Filter

A deeper mechanical-media panel that raises fine-particle capture above a coarse prefilter while retaining a standard HVAC filter footprint.

Mechanical Synthetic Media
MERV 11-13 Range
Corrosion-Resistant Wire Backing
Sealed Rigid Frame

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Product Introduction

The medium-efficiency pleated panel filter uses a fine synthetic mechanical medium formed into uniform radial pleats and bonded to a downstream support grid. Higher fiber density and increased pleat count improve capture of smaller airborne particles compared with a coarse panel, while the expanded surface keeps resistance manageable. The enclosing frame includes diagonal stabilizers and a continuous media bond to prevent bypass. One-, two- and four-inch nominal depths allow the filter to serve as an intermediate stage or as a compact final filter in non-critical ventilation.

Key Features

Mechanical synthetic fibers maintain efficiency without relying solely on an electrostatic charge.

Uniform pleat spacing balances media area with open airflow channels.

A downstream wire backing controls media movement through fan cycling and variable airflow.

Continuous bonding between media and frame closes edge bypass around the pleated pack.

Customer Product Concerns

A medium-efficiency panel must provide sustained particle capture without excessive pleat crowding or edge leakage.

Charged media loses part of its efficiency as the electrostatic effect dissipates.A mechanical fiber blend provides stable capture through the normal loading cycle.

Adding finer media causes an unacceptable increase in fan pressure demand.The deeper pleated geometry expands media area and lowers the velocity through each square metre.

Pleats flutter and release retained dust during variable-air-volume operation.Bonded wire support and diagonal frame members keep the pack stable as airflow changes.

Air leaks around the panel because the rack face is uneven.A square rigid frame with optional perimeter gasket provides a continuous compression surface.

Typical Applications

Second-stage commercial HVAC filtrationCleanroom make-up-air pre-filtrationHospital and laboratory support areasRooftop and packaged unitsProtection for compact and HEPA final filters

Technical Parameters

Typical construction ranges for a medium-efficiency pleated panel filter are shown below.

Core Material	Fine synthetic mechanical media bonded to a corrosion-resistant expanded-wire support
Panel Thickness	22, 45 or 95 mm actual depth
Effective Width	289-610 mm standard face width
Maximum Length	Up to 610 mm standard face length
Steel Facing Thickness	0.30-0.45 mm corrosion-resistant expanded-wire backing
Core Density	Approximately 40-80 kg/m³ nominal fine-media bulk density
Thermal Conductivity	Approximately 0.035-0.045 W/(m·K) for the dry synthetic media
Surface Finish	White mechanical media with galvanized support and moisture-resistant board or metal frame
Joint Type	Radially pleated media bonded to a support grid and continuously sealed into a rigid panel frame
Customization	Available based on the intended application and operating environment.

Available Options

MERV 11, MERV 13 or comparable ISO 16890 grade22 mm compact, 45 mm standard or 95 mm high-capacity pleat packBoard, molded plastic or galvanized perimeter frameUpstream or downstream compression gasket

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