Cleanroom Air Distribution Systems

Phenolic Pre-Insulated Air Duct

A rigid aluminum-faced phenolic foam duct system that combines a low-conductivity insulation core, vapor barrier and air passage in one lightweight panel assembly.

Low-Conductivity Phenolic Core
Continuous Foil Vapor Barrier
Lightweight Rigid Construction
Compact Insulated Wall

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Product Introduction

Phenolic pre-insulated ductwork is fabricated from rigid closed-cell phenolic foam panels laminated with aluminum foil on both faces. The relatively low thermal conductivity provides useful insulation in a thin wall, leaving more service space around the finished duct. Sections are produced by grooving, folding and sealing the panel, then connected using aluminum or polymer profiles with foil tape and vapor-compatible sealant. The system is intended for dry HVAC air distribution and benefits projects that need low installed mass and a clean external finish.

Key Features

Closed-cell phenolic foam limits heat transfer and moisture migration through a compact panel thickness.

Aluminum foil laminates protect both panel faces and form the visible air and vapor barriers.

Low panel mass simplifies lifting through congested plant rooms and above cleanroom ceilings.

Purpose-made connection profiles protect foam edges and transfer loads across section joints.

Customer Product Concerns

Phenolic duct performance depends on preserving the foil skins and sealing every groove, corner and transverse connection without crushing the foam core.

Limited ceiling depth leaves little room for bulky external duct insulation.A thin phenolic wall integrates insulation directly into the duct envelope.

Unprotected foam edges release particles during handling.Edge channels, foil tape and sealant enclose every cut face before installation.

Vapor leakage at panel corners produces hidden condensation.Continuous external foil tape bridges the corner and connects the facing into one vapor barrier.

Point loads from hangers crush the lightweight panel.Wide support saddles distribute the duct weight across reinforced outer surfaces.

Typical Applications

Cleanroom supply-air distributionConditioned return-air branchesHealthcare ventilationCommercial laboratory HVACLightweight modular plant rooms

Technical Parameters

Typical data for aluminum-faced phenolic pre-insulated duct panels are presented below.

Core Material	Closed-cell rigid phenolic foam
Panel Thickness	22–30 mm
Effective Width	1200 mm standard panel width
Maximum Length	2950–3930 mm standard panel length
Steel Facing Thickness	0.04–0.20 mm aluminum foil laminate on each face
Core Density	55–60 kg/m³
Thermal Conductivity	Approximately 0.022 W/(m·K) at 10°C mean temperature
Surface Finish	Embossed aluminum foil on both internal and external faces
Joint Type	Profiled panel connection sealed with compatible adhesive, foil tape and vapor sealant
Customization	Available based on the intended application and operating environment.

Available Options

22 mm or 30 mm panel thicknessReinforced aluminum outer skinFlanged terminal and equipment adaptersFactory-cut elbows, reducers and branches

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