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2026,08,14

Kinmar Composite Ductwork
Fabrication Manual

Technical manual for air duct construction — pre-insulated ductwork for air distribution

Version V1.0 ｜ August 14, 2026 ｜ With illustrations

Contents

Board	Facing	Core	Typical thickness	Recommended application
Steel-faced Magnesium Oxide Board (flat, double-color)	Color steel, both faces	Inorganic MgO core	14 mm	Fire smoke exhaust; medium/high-pressure ducts; excellent fire resistance
Double aluminum-faced polyurethane board	Aluminum foil, both faces	Rigid PU foam	20 mm (custom)	Central air conditioning; high-insulation ducts
Steel-faced phenolic foam board	Color steel, both faces	Phenolic foam	20 mm (custom)	Hospitals, malls; high fire performance, low smoke

Insulation corePU foam / phenolic foam / MgO coreFacing (steel / aluminum)Facing (steel / aluminum)thickness 14–30 mm, tolerance ±0.7 mm

Fig. 1 — Panel cross-section: facings on both sides of the insulation core

WhiteLight greyDark greySea blueScarlet redCream yellowStandard colors — custom colors available on request

Fig. 2 — Standard color steel colors

Single color: color steel on one face only | Double color: on both faces (recommended)
Surface: smooth / embossed (optional); antimicrobial coating for clean rooms (to be confirmed)
Standard width 1200 mm; length 2000–4000 mm; thickness tolerance ±0.7 mm

RectangularRoundFlat-oval

Fig. 3 — Rectangular, round and flat-oval duct sections

Components: straight ducts, elbows, reducers, offsets, take-offs, branches, end caps, flexible connections, access doors, outlets and damper connections
Elbow: radius elbow (low resistance) / square elbow (space-saving, requires turning vanes)
Reducer: concentric / eccentric | Offset: bypass obstacles or misaligned ducts
Take-off: static (side branch) / dynamic (same section, diverts flow)

w+ turning vanes

Kinmar Composite Ductwork Fabrication Manual — Version V1.0, Aug 14, 2026

Author:

Ms. jiangsu golden horse ventilation company

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